approval and certification of the software of loading
Contents
1. 3 2 3 3 3 4 35 The software shall be able to operate in two modes a sur veillance mode which reflects the actual situation of the ship and a simulation mode where the operator can simu late corrective actions The two modes shall be clearly marked on the computer screen so that there is no doubt about in which mode the computer is operated In both modes it must be clearly indicated whether the stability margins are adeguate for both the actual condition and the simulated condition The software should enable continuously monitoring of the flooding situation and record or plot those compart ments where a change in content is registered after the flooding The software shall give a clear warning in case there is a discrepancy between calculated draughts and the remote draught readings It should be possible to give manually input for compart ment fillings in those cases where it becomes evident that a failure has occurred influencing the accuracy of one or more sensors It should be possible to manually enter an estimated value for permeability for any compartment assumed to be re flecting the actual situation in lieu of those set forth by the rules Those compartments which permeability has been altered should be clearly indicated on the computer screen The software should provide the possibility of graphical presentation of the loading condition in order to verify in put of loads The integration and interpolati2. Page 14 To be ticked off X No Software Description Yes No N A Ref Page ff 3 4 Control of stillwater bending moment against limit values 3 5 Control of stillwater stresses including torsion 4 Local Strength 4 1 Limits for maximum mass in any hold as a function of draft Limits for maximum mass in any two adjacent holds as a 4 2 function of draft 4 3 Limits to mass in holds as a function of varying angle of repose 4 4 Limits to filling heights in tanks as a function of cargo density 4 5 Limits to distributed loads on decks 4 6 Control of container lashing 5 Intact Stability 5 1 Free surface effect as correction to initial GM is included 3 2 Free surface effect as correction to GZ values is included 5 3 Calculation of GZ curves included 5 4 Calculation with respect to intact stability criteria is included If calculation and evaluation of severe wind and rolling criteria 5 5 are included both the hull above the water line the structure on deck and all deck cargo are included in the windage area 56 If relevant calculation of other external heeling moments is in cluded and presented eee eee eect eee ee S Graphical presentation of GZ curve is included 6 Grain Stability 6 1 Effect of vertical shift of grain is included 62 If untrimmed ends are included this can only be calculated for 100 filled holds 7 Damage Stability 7 1 Damage stability calculation is based on lost buoyancy method 7 2 Damage stability calc
3. 2 14 LCS DC The software is able to operate in two modes surveillance and simulation mode 2 15 LCS DC Continuous monitoring of the flooding situation 2 16 LCS DC Clear warning in case of discrepancies between calculated draughts and re mote draught readings 2 17 LCS DC Manual input for compartment fillings possible in surveillance mode if failure of one or more sensors 2 18 LCS DC Manual input for permeability possible 2 18 1 Compartments with altered permeability clearly indicated on the screen 3 Longitudinal strength 3 1 Control of stillwater shear forces against limit values 3 2 Correction of shear forces for bulk carriers 3 3 Correction of shear forces for tankers 3 4 Control of stillwater bending moment against limit values 3 5 Control of stillwater stresses including torsion 4 Local Strength 4 1 Limits for maximum mass in any hold as a function of draft 4 2 Limits for maximum mass in any two adjacent holds as a function of draft 4 3 Limits to mass in holds as a function of varying angle of repose 4 4 Limits to filling heights in tanks as a function of cargo density 4 5 Limits to distributed loads on decks 4 6 Control of container lashing 5 Stability 5 1 Free surface correction to initial GM is included 5 2 Free surface effect as correction to GZ values is included 5 3 Calculation of GZ included 5 4 Calculation with respect to intact stability criteria included DET NORSKE VERITAS Classification Notes
4. No 21 1 October 2009 Page 9 To be ticked off X No Software Description Yes No N A If calculation and evaluation of severe wind and rolling criteria are included both the 5 5 hull above the water line the structure on deck and all deck cargo are included in the windage area 56 If relevant calculation of other external heeling moments is included and presented 5 7 Graphical presentation of GZ curve is included 6 Grain Stability 6 1 Effect of vertical shift of grain is included 6 2 If untrimmed ends are included this can only be calculated for 100 filled holds 7 Damage Stabilitv 7 5 A default list of damage cases is included 7 7 Calculation of equilibrium position after damage is included draft trim and heel 7 8 Calculation of GZ curve is included 7 9 Unprotected openings are included and taken into account in the program 7 10 Weathertight openings are included and taken it account in the program 7 12 Evaluation with respect to all actual damage stability criteria is included 7 14 Calculation of intermediate stages of flooding 7 15 Graphical presentation of equilibrium position and GZ residual curve 8 Documentation to submit 8 1 User Manual 8 3 Test Conditions 8 3 1 Light ship condition 8 3 2 Light ship condition 8 3 3 Fully loaded condition 8 3 4 Extreme condition anticipated worst condition for strength a
5. The Society reserves the exclusive right to interpret decide equivalence or make exemptions to this Classification Note Amendments and Corrections This document is valid until superseded by a new revision or withdrawn Minor amendments and corrections will be published in a separate document normally updated twice per year April and October For a complete listing of the changes see the Amendments and Corrections document located at http webshop dnv com global under category Guidelines and Classification Notes The electronic web versions of the DNV Classification Notes will be regularly updated to include these amendments and corrections Main changes This document replaces the January 2004 edition The main changes are Additional items have been included reflecting the DNV class notation LCS DC Pt 6 Ch 9 Sec 4 Comments may be sent by e mail to rules amp dnv com For subscription orders or information about subscription terms please use distribution dnv com Comprehensive information about DNV and the Society s services is found at the Web site http www dnv com Det Norske Veritas Computer Typesetting Adobe FrameMaker by Det Norske Veritas Printed in Norway If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas then Det Norske Veritas shall pay compensation to such person for his proved direct loss or damage However the compen
6. Type Approval Expiring Date Responsible for invoice It should be noted that not all items in the form are require ments Some of the items are meant for information while some other items may not be applicable to the software or the ship in question Reference is made to the Rules for Classifica tion of Ships Pt 6 Ch 9 Sec 1 A300 General software require ments To be ticked off X No Software Description Yes No N A 1 General Information LI The tvpe approval covers all the strength and stabilitv applications as calculated for l this actual vessel 1 5 The approval is with respect to strength 1 5 1 Provided that the strength limits are agreed upon 1 6 Approval is with respect to stabilitv limit curves 1 6 The limit curves cover the following stabilitv regulations 17 Approval is with respect to intact stabilitv calculation including evaluation of criteria against GZ curve 1 7 1 Intact stability regulations 0 nana nara nn nannti 18 Approval is with respect to damage stability calculation including evaluation of cri teria against GZ curve 1 8 1 Damage stability regulations seen nn nnnnnna 1 9 Approval is with respect to grain stabilitv 1 9 1 Grain stabilitv for untrimmed ends 1 9 2 Maximum grain heeling moment 1 9 3 Evaluation of GZ curves 1 10 Approval is with respect to other applications and regulations 1 11
7. When the submitted data has been checked and found in order type approval will be given Type approval certifi cate will be issued Limitations The type approval is valid only for the calculation results Le the type approval is a confirmation that the software is able to give correct results provided that the stored characteristic data DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 6 of the vessel and the user s input is correct Renewal The type approval is valid only for an identified specific ver sion of the software Whenever the software is revised the type approval is no longer valid In order to get a renewal of the type approval the manufacturer has to submit the details of the re vision and DNV will decide the extent of testing required The Type Approval Certificate will remain valid for a period of four years The Certificate will be renewed upon confirma tion from the manufacturers of the calculation program that the calculation algorithms remain unchanged DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 7 Appendix A Approval Request Form for Type Approved Loading Computer Software To be filled in Ship Name and DNV ID No Name of Ship Yard Ship Yard Building No Software Producer Name and Address Software Name Software Version No Software Version Date Type Approval Certificate No
8. 2 1 volume together with capacitv tables sounding ullage tables if appropriate are protected i e can not be changed bv user 2 8 If included Limit curves KG GM are protected i e can not be changed by user Where relevant default group of damage cases are protected i 2 9 e can not be changed by user Safeguarding against erroneous input such as overfilling of 2 10 ey tanks filling same tanks twice etc 2 11 The following data are presented for each loading condition 2 11 1 Clear deadweight definition 211 2 Light ship data 2 11 3 Displacement and centre of gravity VCG LCG TCG 2 11 4 Draughts at the perpendiculars and at midship Forward midship and aft draughts at the actual position of the 2 11 5 gt ship s draught marks Provision made available for the introduction of a longitudinal 2 11 6 deflection 2 11 7 Trim clearly referring to a reference length 2 11 8 Transversal metacentric height KM 2 11 9 Initial metacentric height GM 2 11 10 Free surface moment from slack tanks 2 11 11 Free surface correction on the initial metacentric height 2 11 12 Free surface correction on the GZ curve 2 11 13 Flooding angle presented and included in the stability criteria control DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 13 To be ticked off X No Software Des
9. Normally a virtual increase of KG is assumed based on maximum moment of inertia of slack tanks or GZ is corrected based on the actual heeling moment due to shifting of liquid or GZ is corrected based on a heeling moment due to shifting of liquid calculated according to Appendix I of IMO Res olution A 167 ES IV The software should calculate the righting lever GZ curve in intact condition including correction for the free surface effect at intervals of heeling angles not exceeding 5 degrees up to at least 40 degrees The software should calculate intact stability based on the righting lever GZ curve including correction for the free surface effect such as area under GZ curve between 0 30 degrees 0 40 degrees 30 40 degrees angle of maximum GZ value of maximum GZ between 30 40 degrees or down flooding angle if this is less than 40 degrees as well as value of initial GM External heeling moments should be calculated as in on board stability booklet or according to applicable rules External moments may be moments due to wind passen ger heeling towing or others The software should provide for graphical presentation of GZ curve in intact condition Grain Stability To be same as in approved Grain Loading Manual DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 18 Damage Stability need only to answered if the soft 7 ware checks against damage stability limit curves on ly 7 1 It s
10. development and testing of the software for example ISO 9000 3 It is important that the software pro ducer has implemented a quality assurance system in con nection with the development and testing of the software Reference to approval given by authorities and other clas sification societies should be given SOFTWARE SPECIFICATIONS General Software Specifications On line user s task help means that the software system provides on line help for input output printing etc to per form these functions and evaluate the results Stored lightweight data must be reasonably protected from accidental alterations A special procedure should be established if alterations of these data are necessary Stored geometry characteristic data i e hull definition compartment definition openings and hydrostatic tables stability curves etc must be reasonably protected from ac cidental alterations A special procedure should be estab lished if alterations of these data are necessary A group of damage cases corresponding to the damage cases in the approved stability documentation Not to be changed after approval The software design should be such that it limits possible input errors by the user For example it should not be pos sible to input a volume in a tank that exceeds the tank s to tal volume or it should not be possible to change the position of the compartments when positioning solid weights related to a given compartments su
11. for those who are in volved in the approval and certification of a Loading Computer System for a specific ship Le the software manufacturer who wish to have his software approved for a specific ship or the yard which needs an approval and certification of the Loading Computer System installed on board a vessel they are about to deliver Requirements for Loading Computer Systems for specific ships are given in the Rules for Classification of Ships Pt 6 Ch 9 This Classification Note is also guidance for those manufactur ers Who wish to have their software type approved 2 Definitions 2 1 Loading Computer System A loading computer system is a computer based system for cal culation and control of loading conditions for compliance with the applicable stability longitudinal and local strength require ments The loading computer system consists of software cal culation program and the computer hardware on which it runs 2 2 Approval and certification for a specific vessel Approval of software means that DNV approves the software for a specific installation onboard a specific vessel The ap proval is based on a review and acceptance of design calcula tion method verification of stored data and test calculations for the specific vessel Approval of the software is to be carried out for each specific vessel where the software is to be installed Approval of the software results in approved test conditions If the softw
12. openings residual GM 7 8 The software should calculate the righting lever GZ curve in damaged condition including correction for the free surface effect at intervals of heeling angles not exceeding 5 degrees up to at least 50 degrees FAD The software should calculate damage stability results based on the righting lever GZ curve including correction for the free surface effect such as equilibrium position and value of residual GM as well as the area under GZ curve between equilibrium and 20 degrees value of max imum GZ between equilibrium and 20 degrees or down flooding angle if this is less 7 13 When applicable the software should calculate damage stability taking into account a defined external heeling moment such as passenger heeling moment wind heeling moment or launching of life boats 7 14 It should be stated whether the software can calculate in termediate stages of flooding and how such calculations are performed 7 16 The software should provide for graphical presentation of the equilibrium position after damage and GZ curve in damaged condition 8 Documentation to be submitted 8 1 8 2 To be in accordance with the Rules for Classification of Ships Pt 6 Ch 9 Sec 2 8 3 Stored data should be for the range for trim desired to cal culate If based on even keel data only the accuracy of the stability calculations will decrease with increasing trim DET NORSKE VERITAS
13. Approval includes requirements for class notation LCS DC 2 General Software Specifications 212 Loading limitations are included and the values are included in the stored character istic data 2 12 1 Minimum draft due to slamming DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 8 To be ticked off X No Software Description Yes No N A 2 12 2 Maximum draft load line draft 2 12 3 Maximum GM to limit sloshing in slack tanks 2 12 4 Maximum trim due to range of trim covered by stored hydrostatic data cross curves PST limit curves or others Cargo tanks and ballast filling strength stability for example when ballast tanks 2 12 5 surrounding empty cargo compartments are to be kept full etc 2 12 6 Cargo tank filling height as a function of cargo density strength 212 7 Cargo compatibility with respect to type of cargo in adjacent compartments 2 12 8 Limits to distribute loads on deck the weights on a given deck shall be limited by eee strength for which the deck is approved 2 12 9 For vessels with ice class a clear warning is given if the ice draughts UIWL and LIWL are included Clear warning is given if the loading limitations 1 6 1 7 1 8 1 9 and 2 12 are not 2 12 10 rhea fulfilled 2 13 Calculation of tank capacities and centre of gravity is included with trim correction
14. CLASSIFICATION NOTES No 21 1 APPROVAL AND CERTIFICATION OF THE SOFTWARE OF LOADING COMPUTER SYSTEMS OCTOBER 2009 DET NORSKE VERITAS Veritasveien 1 NO 1322 H vik Norway Tel 47 67 57 99 00 Fax 47 675799 11 FOREWORD DET NORSKE VERITAS DNV is an autonomous and independent foundation with the objectives of safeguarding life prop erty and the environment at sea and onshore DNV undertakes classification certification and other verification and consultancy services relating to quality of ships offshore units and installations and onshore industries worldwide and carries out research in relation to these functions Classification Notes Classification Notes are publications that give practical information on classification of ships and other objects Examples of de sign solutions calculation methods specifications of test procedures as well as acceptable repair methods for some components are given as interpretations of the more general rule requirements A list of Classification Notes is found in the latest edition of Pt 0 Ch 1 of the Rules for Classification of Ships and the Rules for Classification of High Speed Light Craft and Naval Surface Craft The list of Classification Notes is also included in the current Classification Services Publications issued by the Society which is available on request All publications may be ordered from the Society s Web site http webshop dnv com global
15. are is type approved the review and acceptance of design is not necessary for each specific vessel Only verifica tion of user s manual stored data and test calculations for the specific vessel will then be carried out Certification installation testing is carried out to ensure that the loading computer system works properly onboard the spe cific vessel and to ensure that the correct approved version of the software has been installed Certification is to be carried out for each vessel where a load ing computer system has been installed Loading Computer Certificate DNV Form No 60 00a is is sued 2 3 Class notation LCS DC This voluntary class notation applies to integrated systems de veloped to assist the master as a decision aid when the ship has been subjected to damage and consequent flooding Require ments are outlined in the Rules for Classification of Ships Pt 6 Ch 9 Sec 4 2 4 Type approval Type approval means that DNV has approved the design methods and specifications of the software in general The type approval is given based on a review and acceptance of design calculation methods and documented test results for at least two test vessels Type approval certificate is issued In the type approval certificate it will be stated what kind of calculations the type approval covers The type approval will be included in the DNV register of Type Approved Products file no 780 90 In connection with approval f
16. ch as stores or swimming pools Relevant data to be presented for each loading condition It should be described whether the software takes into ac count applicable loading limitations such as maximum draft not to exceed freeboard marks minimum draft due to strength considerations slam ming maximum trim in cases where limit curves are approved for specified limited trim minimum GM to satisfy the applicable stability require ments maximum GM to limit sloshing in slack tanks limits on cargo tanks or ballast tanks filling due to strength or stability considerations for example when bal last tanks surrounding empty cargo compartments are to be kept full etc maximum tank filling as a function of liquid cargo densi ty as approved with respect to strength and stability cargo compatibility with respect to types of cargo in ad jacent compartments limits to distributed loads on deck the weights on a given deck shall be limited by the strength for which the deck is approved A warning should be given if any loading limitation is ex ceeded It should be stated whether the software calculates liquid contents taking trim into account If not a note should be made in the user s manual to draw the attention to possible correction for loading conditions with significant trim DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 17 2 14 2 15 2 16 2 17 2 18 2 19 2 20 2 21 2 22
17. condition anticipated worst condition for strength as founded in the manual 8 3 5 5 test damage cases for LCS DC Not required in case damage stability calculations are included for rule check Y on 1 8 8 4 Stored Characteristic data 8 4 1 Hydrostatic data for range of trim en 8 4 2 Cross Curves KN data for range of trim 8 4 3 Tank data maximum volume max VCG TCG LCG and maxi mum free surface moment FSM 8 4 4 Weathertight amp unprotected openings margin line flooding an gle 8 4 5 List of limit values KG GM for range of trim 8 4 6 List of grain data table of volumetric heeling moment for partly filled holds tables pertaining to cargo holds filled with ends un trimmed tables of maximum permissible grain heeling moment 8 4 7 Groups of damage cases if damage included 8 4 8 Other data as container data timber loading data cross curves data for calculation of severe wind and rolling criteria 8 4 9 Associated limits to still water shear force bending moments and torque as applicable for seagoing harbour and flooded condi tions 8 5 The documentation is in accordance with the approved onboard Loading and Stability documentation N A Not Applicable No refers to Appendix C Guidance for filling in Approval Request Form for Loading Computer software Ref Page Answer to each question should be commented separately and enclosed alternatively reference could be made to act
18. cription Yes No N A Ref Page 21114 Listing of all relevant stabilitv criteria description of the criteria i the limit values and the obtained values 2 11 15 Where applicable effect of external heeling moments Shear forces bending moments torgue and local strength as well 2 11 16 EN as the limiting values for those parameters Loading condition results of strength and stability calculation are 2 11 17 included 2 11 18 Judgement of each loading condition with respect to all actual Get strength and stability criteria is clearly shown 2 11 19 Clear warning is given if any of the actual strength and or sta Peet bility criteria are not fulfilled en Loading limitations are included values to be included in stored 2 12 een characteristic data 2 12 1 Minimum draft due to slamming 2 12 2 Maximum draft load line draft 2 12 3 Maximum GM to limit sloshing in slack tanks 2 12 4 Minimum GM Maximum KG due to stability Maximum trim due to range of trim covered by stored hydrostat 2 12 5 mep ic data cross curves limit curves or others Cargo tanks and ballast filling strength stability e g when bal 2 12 6 last tanks surrounding empty cargo compartments are to be kept full etc Cargo tank filling height as a function of cargo density 2 12 7 strength 2128 Cargo compatibility with respect to type of cargo in adjacent nee compartments 2 12 9 For vessels with ice class a clear warning is given if the ice drau
19. eeded The software should be capable of including and storing approved limits to maximum filling height in any tank as a function of cargo density and show utilisation of limit values A warning should be given if limits are exceeded The software should be capable of including and storing approved limits to distributed loads on decks and show utilisation of limit values A warning should be given if limits are exceeded The software should be capable of controlling container and container lashing strength related to stack height weight and the ship s GM and selected lashing arrange ment Intact Stability The method by which initial GM is corrected for free sur face effect of slack tanks should be described The lower and upper limits of tank level for calculating the free sur face effect are to be given A correction based on a virtual increase of KG based on maximum moment of inertia of slack tanks may be accept ed The method by which initial GM is corrected for free sur face effect of 98 full tanks should be described A correction based on a virtual increase of KG based on moment of inertia at 98 tank level may be accepted or by applying the vertical centre gravity of full tank The latter method is not recommended for very wide tanks as the free surface effect can be under estimated The method for which GZ values in intact condition are corrected for free surface effect of slack tanks is to be de scribed
20. evaluate and judge with respect to should be listed for example IMO Resolution A 749 ES IV Chapter 3 1 1 8 Approval with respect to damage stability calculations in dicates that the software can perform damage stability cal culations evaluate and judge the results with respect to the applicable damage stability criteria 1 8 1 The damage stability rules regulations which the soft ware can evaluate and judge with respect to should be listed for example MARPOL 73 78 Regulation 25 1 9 Approval with respect to grain stability calculations indi cates the software can perform grain stability calculations to be compared with the applicable grain stability criteria 1 9 1 The software can take into account grain heeling moments from untrimmed ends 1 10 DNV towing criteria or others please specify 1 12 1 13 1 14 II 2 1 2 2 2 3 2 8 2 9 2 10 2 11 2 12 2 13 Class notation LCS DC applies to integrated systems de veloped to assist the Master as a decision aid when the ship has been subjected to damage and consequent flood ing The requirements are outlined in the Rules for Classi fication of Ships Pt 6 Ch 9 Sec 4 Some of the documentation must be provided by the yard and some by the software manufacturer This is in cases where on line remote reading of tank soundings or drafts can be entered automatically into the program It should be stated which quality assurance system has been used for
21. evant to be filled in if the approval request is in connection with general It should be noted that not all items in the form are require ments Some of the items are meant for information while some other items may not be applicable to the software or the ship in ques tion Reference is made to the Rules for Classification of Ships Pt 6 Ch 9 Sec 1 A300 General software requirements To be ticked off X No Software Description Yes No N A Ref Page 1 General Information 1 1 Approval is requested in connection with initial type approval 12 Approval is requested in connection with approval for a specific ship 1 3 Approval is requested for calculations for mono hull ships only 14 Approval is requested for calculations for arbitrary floating structures 1 5 The approval is with respect to strength 1 5 1 It is provided that the strength limits are agreed upon 1 6 Approval is with respect to stability limit curves 1 61 The limit curves cover the following stability regulations 17 Approval is with respect to intact stability calculation including evaluation of criteria against GZ curve 171 Intact stability regulations 1 8 Approval is with respect to damage stability calculation includ N ing evaluation of criteria against GZ curve 1 8 1 Damage stability regulations 1 9 Approval is with respect to grain stability 1 9 1 Grain stability for untrimmed ends 1 9 2 Appro
22. ghts UIWL and LIWL are included 2 12 10 Limits to distribute loads on deck the weights on a given deck Ja shall be limited by strength for which the deck is approved 2 12 11 Clear warning is given if the loading limitations in 1 6 1 7 1 8 m 1 9 and 2 12 are not fulfilled 2 13 Calculation of tank capacities and centre of gravity is included with trim correction 2 14 LCS DC The software is able to operate in two modes surveil lance and simulation mode 2 15 LCS DC Continuous monitoring of the flooding situation 2 16 LCS DC Clear warning in case of discrepancies between calcu lated draughts and remote draught readings 2 17 LCS DC Manual input for compartment fillings possible in sur veillance mode if failure of one or more sensors 2 18 LCS DC Manual input for permeability possible 2 18 1 Compartments with altered permeability clearly indicated on the screen 2 19 Graphical presentation of loading conditions is included 2 20 Integration and interpolation method and limitations 2 21 Iteration limits 0 0 0 a a nn 2 22 If on line interface possibility is provided for manual input 3 Longitudinal Strength 3 1 Control of stillwater shear force against limit values 3 2 Correction of shear forces for bulk carriers 3 3 Correction of shear forces for tankers DET NORSKE VERITAS Classification Notes No 21 1 October 2009
23. hould be stated whether the damage stability calcula tions are based on lost buoyancy method This method is preferable 7 2 It should be stated whether the damage stability calcula tions are based on added weight method 7 3 The method by which GZ values in damaged condition are corrected for free surface effect of slack tanks should be described Normally GZ is corrected based on the actual heeling mo ment due to shifting of liquid or GZ is corrected based on an assumed heeling moment due to shifting of liquid at 5 degrees MARPOL or a virtual increase of initial KG is assumed based on max imum moment of inertia of slack tanks 7 4 If damaged tanks contain liquids before the assumed dam age the software should take this into account bv assum ing such initial liquid contents flow out before filling the damaged compartment with sea water 7 5 For checking damage stabilitv of a planned loading condi tion a default list of damage cases should be stored so the user run damage stabilitv calculations applving these pre defined damage cases 7 6 For checking damage stabilitv of a current or planned loading condition the user mav define other certain dam age cases to run damage stabilitv calculations for those de fined damage cases TA Calculation of eguilibrium position after damage should include draft forward and aft and mean draft trim heel angle distance between eguilibrium water line and down flood ing
24. ng and harbour conditions as relevant and show the uti lisation of the limit values Reduced limits for bulk carriers in alternate loading conditions should be availa ble The control may be performed continuously along the ship s length or alternatively related to specified check points see 2 4 1 If specified check points are used the software should also control the bending moment maxima between the check points A warning should be given if the limit values are exceeded The software should have the possibility of controlling longitudinal stresses including torsion and show the utili sation of the allowable values A warning should be given if the limits are exceeded Local Strength 4 1 4 2 4 3 4 4 4 5 4 6 5 2 5 3 5 4 5 5 5 6 5 7 6 1 6 2 Where applicable the software should be capable of in cluding and storing approved limits for maximum mass in any hold as a function of draught and show utilisation of limit values A warning should be given if limits are ex ceeded The software should be capable of including and storing approved limits for maximum mass in any two adjacent holds as a function of draught and show utilisation of lim it values A warning should be given if limits are exceed ed The software should be capable of including and storing approved limits for mass in holds for varying angle of re pose and show utilisation of limit values A warning should be given if limits are exc
25. on method and limitations should be described The number of intervals should be sufficient to provide accurate integration and interpola tion The iteration out off limits should not exceed 1 of the reverting value for on board software These limits can be obtained by comparing results from the latest two itera tions The number of iterations should be limited to avoid infinite loops If the obtained results are not within the above limits a warning should be given For systems with on line interface it should also be possi ble to enter data manually for planning of load conditions In case of failure of an on line interface an error message should be given Longitudinal Strength The software shall be capable of comparing calculated corrected stillwater shear forces with limit values for sea going and harbour conditions as relevant and show the utilisation of the limit values This control may be per formed continuously along the ship s length or alternative ly related to specified check point A warning should be given if the limit values are exceeded For correction of shear forces for bulk carriers reference is made to the Rules for Classification of Ships Pt 3 Ch 1 Sec 5 D200 For correction of shear forces for tankers reference is made to the Rules for Classification of Ships Pt 3 Ch 1 Sec 5 D300 and D400 The software shall be capable of comparing calculated stillwater bending moments with limit values for seago i
26. or a specific ship with type ap proved software less documentation will be required and less fee will be charged 3 How to Obtain Approval and Certifica tion for a Specific Vessel The following stepwise procedure applies 1 The Approval request Form is to be submitted For type approved software use the form Approval Re quest Form for Type Approved Loading Computer Soft ware as given in Appendix A For not type approved software use the form Approval Request Form for Load ing Computer Software as given in Appendix B It must be clearly stated for what parts of the software the approv al is requested 2 Upon receipt of the filled in form DNV will indicate the fee for the approval and certification Fees of approval are dependent on the applications to be approved These fees are reduced for type approved software and they are re duced for sister vessels 3 Documentation as listed in the Rules for Classification of Ships Pt 6 Ch 9 Sec 2 is to be submitted for approval 4 When the submitted data has been checked and found in order the approved test conditions will be returned 5 When the software has been approved for the specific ves sel certification is to be carried out as described in the Rules for Classification of Ships Pt 6 Ch 9 Sec 3 6 Class Notation LCS DC additional documentation as list ed in the Rules for Classification of Ships Pt 6 Ch 9 Sec 4 is to be submitted for approval 4 H
27. ow to Obtain Type Approval The following stepwise procedure applies 1 The form Approval Request Form for Loading Computer Software as given in Appendix B is to be filled in and submitted to DNV It must be clearly stated for what parts of the software the type approval is requested 2 Upon receipt of the filled in form DNV will indicate the fee for type approval 3 Manufacturer and DNV are to agree on applicable test ves sels The test vessels can either be standard test vessels provided by DNV or other vessels preferred by the manu facturer The latter can be ships in operation or newbuild ings as suitable The test vessels must be for at least two different ship types For calculation programs based on the input of hull form data test data should be provided for three different ship types If the DNV standard test ships are applied the necessary ship data ship lines description of compartments light ship data etc will be supplied by DNV 4 For each of the test vessels documentation as required in above 3 3 is to be submitted Le documentation as for specific approval for each of the test vessels Often it is practical to combine the type approval with specific ap proval for each of the test vessels If the DNV standard test ships are applied the calculations required will be described in the data supplied by DNV definition of cargo and supplies in the test conditions if relevant damage cases etc 5
28. s founded in the manu al 8 3 5 5 test damage cases for LCS DC Not required in case damage stability calculations are included for rule check Y on 1 8 8 4 Stored Characteristic data 8 4 1 Hydrostatic data 8 4 2 Cross curves KN data 8 4 3 Tank data maximum volume max VCG TCG LCG and maximum free surface moment FSM 8 4 4 List of unprotected openings margin line flooding angle if installed in the program weathertight openings 8 4 5 List of limit values KG GM 8 4 6 List of grain data table of volumetric heeling moment for partly filled holds tables pertaining to cargo holds filled with ends untrimmed tables of maximum permissi ble grain heeling moment 8 4 7 Group of damage cases 8 4 8 Other data as container data timber loading data cross curves data for calculation of severe wind and rolling criteria 8 4 9 Associated limits to still water shear force bending moments and torque as applica ble for seagoing harbour and flooded conditions DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 10 To be ticked off X No Software Description Yes No N A 8 5 The documentation is in accordance with the approved onboard Loading and Stabil i ity documentation 9 Alterations to the Software 9 1 Are alterations affecting the results carried out N A Not Applicable No refers to Appendix C Guidance for filling in Approval Reque
29. sation shall not exceed an amount equal to ten times the fee charged for the service in question provided that the maximum compen sation shall never exceed USD 2 million n ths Provision Det Norske Veritas shall mean the Foundation Det Norske Veritas as well as all its subsidiaries directors officers employees agents and any other acting on behalf of Det orske Veritas Classification Notes No 21 1 October 2009 Page 3 CONTENTS 1 INTRODUCTION ssessesvevseveenennvenennennvnnennennveveneenennee 5 APPENDIX B 2 DEFINITIONS ssenenssnnnnesennzznsensssennesonnsoseennsenena 5 APPROVAL REQUEST FORM FOR LOADING 2 1 Loading Computer System sms nneeenennenn 5 COMPUTER SOFTWARE ceccoccccscocecccscscececececsescesecessecoece 11 2 2 Approval and certification for a specific vessel 5 2 3 Class notation LCS DC ooo ccc ese 5 APPENDIX C 24 Type pprovalssksssisrvsseiirietsidertis seie dreiv 5 3 HOW TO OBTAIN APPROVAL AND REQUEST FORM FOR LOADING COMPUTER CERTIFICATION FOR A SPECIFIC VESSE A Ste 5 SOFTWARE srsseesessevsvaveansensenseaneansensensensenseenennsensenseavsensene 16 4 HOW TO OBTAIN TYPE APPROVAL 5 APPENDIX A APPROVAL REQUEST FORM FOR TYPE APPROVED LOADING COMPUTER SOFTWARE 7 DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 4 DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 5 1 Introduction This Classification Note is a guidance
30. st Form for Loading Computer software A new version of the software should be given when significant software alterations affecting the results are carried out If changes affecting the results are made to the software description of the changes is to be submitted and the type approval might have to be renewed refers to Appendix C Guidance for filling in Approval Reguest Form for Loading Computer software Some items are left out because not applicable for type approved software To be filled in Place Date On behalf of Software Producer Name Position Signature DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 11 Appendix B Approval Request Form for Loading Computer Software when the software is not type approved It can also be used for application for type approval Reference is made to the Rules for Classification of Ships Pt 6 Ch 9 Sec 1 A300 General software requirements This approval request form is to be used for specific ships To be filled in Ship Name Name of Ship Yard Ship Yard No Software Producer Name and Address Software Name Software Version no Software Version date Data Operating System Requirements for hardware Responsible for invoice request for type approval To be filled in when the approval is for a specific ship usually not rel
31. tware alterations affecting the results are carried out Type approval of stability and longitudi nal strength software is rendered on a voluntary basis Such type approval will make the approval process for a specific ship easier and reduces cost Less documentation will be required and less fee will be charged 1 2 Software is to be approved for each ship where it is in stalled 1 3 The approval of the software is valid for mono hull ships only 1 4 If the approval is requested for arbitrary floating struc tures a special agreement on testing will have to be made The software must have possibility to calculate stability about any arbitrary axis 1 5 Approval with respect to longitudinal strength means that the software calculates the longitudinal strength of given loading conditions in terms of shear forces and bending moments and checks these against approved limit curves defined in the software 1 6 Approval with respect to stability limit curves means the software calculates the stability of given loading condi tions in terms of KG or GM and checks these against ap proved limit curves defined in the software 1 7 Approval with respect to intact stability calculations indi cates the software can perform intact stability calcula tions in terms of a GZ curve evaluate and judge the results with respect to the applicable intact stability crite ria 1 7 1 The intact stability rules regulations which the software can
32. ual pages in User s Manual or Program Description To be filled in Place Date On behalf of software producer Name Position Signature DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 16 Appendix C Guidance for Filling in Approval Request Form for Loading Computer Software It should be noted that not all items in the Form are require ments Some of the items are meant for information which may be used in connection with the software approval or the imple mentation to a specific ship Some other items may not be ap plicable to the software in question Reference is made to the Rules for Classification of Ships Pt 6 Ch 9 Sec 1 A300 Gen eral software requirements In the column Ref Page No reference to the description of how the particular item is handled by the software should be given The description may be given on a separate sheet or ref erence could be made to actual pages in User s Manual or Pro gram Description The following guidance should be used when filling in the Ap proval Request Form I SOFTWARE DESCRIPTION General Information 1 1 Initial type approval is applicable in connection with the first time DNV type approval of the software is applied for The type approval is valid for four years from the type approval date or to a new version of the software is produced A new version of the software should be given when significant sof
33. ulation is based on added weight method 7 3 Free surface effect as a correction to GZ values is included 7 4 Correction for initial contents of damaged tanks is included 7 5 A default list of damage cases is included 7 6 Possibilitv of defining damage cases is included 7 7 Calculation of equilibrium position after damage is included draft trim and heel 7 8 Calculation of GZ curve is included 7 9 Unprotected openings are included and taken into account in the i program 710 Weathertight openings are included and taken into account in the program If relevant internal openings openings between sections or 7 11 compartments inside the ship are included and taken into ac count in the program 7 12 Evaluation with respect to all actual damage stability criteria is included DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 15 To be ticked off X No Software Description Yes No N A Ref Page 7 13 Where relevant calculation of external heeling moments is in i cluded 7 14 Calculation of intermediate stages of flooding 7 15 Graphical presentation of equilibrium position and GZ residual curve 8 Documentation to Submit 8 1 User s Manual 8 2 Program Description 8 3 Test Conditions 8 3 1 Lightship condition 8 3 2 Ballast or partly loaded condition 8 3 3 Fully Loaded condition 8 3 4 Extreme
34. val is with respect to maximum grain heeling moment DET NORSKE VERITAS Classification Notes No 21 1 October 2009 Page 12 To be ticked off X No Software Description Yes No N A Ref Page ff 1 9 3 Approval is with respect to calculation of criteria directly on the GZ curves 1 10 Approval is with respect to other applications and regulations A vanne vaain nian ddan VEEN undies seeder ba 1 11 Approval includes requirements for class notation LCS DC 1 12 Approval includes on line interface 1 12 1 Readings used as on line input 1 13 Quality assurance system applied for development and test i IO radarene dreie soe TO YSS TON ed BE 1 14 Approval given by other authorities or classification socie EEE AE EEE evan 2 General Software Specifications 2 1 On line user s task help is provided Lightship weight and lightship weight distribution and associat 2 2 ed centres of gravity are protected i e can not be changed by user 23 The Society s imposed structural limitations are protected i e can not be changed by user 34 If included Geometric hull form data are protected i e can not a be changed by user 2 5 Hydrostatic data are protected i e can not be changed by user 2 6 If included Cross Curves are protected i e can not be changed by user Compartment definitions including frame spacing and centres of
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