Club Certificate2025
Grandma BenNOR 15080
Norges Seilforbund
Sognsveien 73
0854 OSLO
Rated boat velocities in knots
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles44.5°44.5°42.2°40.4°39.2°38.5°38.1°38.0°38.8°
Beat VMG2.353.294.054.614.955.115.205.275.22
52°3.735.086.096.727.057.227.307.397.40
60°3.995.396.376.947.247.417.507.617.63
75°4.165.596.577.107.417.627.787.968.05
90°4.255.766.837.357.637.807.948.278.48
110°4.265.826.957.517.898.228.508.939.31
120°4.105.656.817.427.848.238.609.3710.06
135°3.585.036.237.067.547.958.369.3010.91
150°2.944.225.366.327.037.467.818.529.39
Run VMG2.553.654.645.486.116.576.977.608.22
Gybe Angles142.3°142.3°146.9°149.2°152.2°157.6°162.6°164.6°161.5°
APH ToD:558.7CDL: 9.211APH ToT: 1.0739CertNo:670591
BOAT
ClassScanner 391DesignerOLOFSSONBuilderScan YachtsAge dateSeries date01/1998Offset fileG1131.BOFData file670591
HULL
Length Overall11.720 mMaximum Beam3.618 mDraft1.899 mDisplacement5,787 kgDLR6.2530IMS DivisionCruiser/RacerDynamic Allowance0.210%Age Allowance0.487%
PROPELLER
InstallationIn ApertureTypeFolding 3 bladesDiameter0.400m
CREW
Maximum weight663 kg(default)Minimum weight533 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail39.2939.91Headsail Luffed26.0026.00Headsail FlyingSymmetricAsymmetric92.3492.34 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail11.85Storm Jib9.53Heavy Weather Jib25.71
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.
Club Certificate2025
Grandma BenNOR 15080
Norges Seilforbund
Sognsveien 73
0854 OSLO
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1532.01094.9887.8781.7727.3704.3692.4683.5689.9
52°966.1708.8591.6535.4510.5498.9493.2487.2486.5
60°901.5668.1565.0519.0497.4486.1480.0473.3471.7
75°865.6644.2547.9506.9485.9472.3462.8452.3447.3
90°847.9624.6526.9489.6471.7461.6453.4435.4424.3
110°844.9618.1518.1479.6456.3438.0423.3403.2386.7
120°877.8637.0528.9485.3459.4437.7418.4384.0357.7
135°1005.5715.3577.8510.2477.4452.9430.7387.2329.9
150°1223.0853.4672.0569.4512.4482.5460.9422.6383.6
Run VMG1412.2985.5776.0657.5589.7547.8516.4473.6438.0
Selected Courses
Windward / Leeward1471.81040.2831.9719.6658.5626.0604.4578.6563.9
All purpose1106.1794.4648.3576.1538.2516.6501.6480.2464.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward691.20.8680
All purpose558.71.0739
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7538
Downwind "popa"0.9238
70% up, 30% down "Ilhabela"0.7978
30% up, 70% down "Ilhabela-inverso"0.8652
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Predominantly Upwind607.10.9884
Predominantly Downwind565.01.0619
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low721.40.8318
Triple Number AP Medium554.71.0818
Triple Number AP High497.31.2065
Triple Number Windward/Leeward Low978.40.6132
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Single Number Predominant Upwind633.70.9469
Single Number Predominant Reaching554.21.0826
Single Number Predominant Downwind590.11.0168
Predominant Upwind - Low886.10.6771
Predominant Upwind - Low/Med669.00.8968
Predominant Upwind - Medium586.71.0227
Predominant Upwind - Med/High547.91.0951
Predominant Upwind - High531.31.1292
Predominant Downwind Low861.30.6966
Predominant Downwind Low/Med636.30.9430
Predominant Downwind Medium545.21.1006
Predominant Downwind Med/High491.21.2215
Predominant Downwind High456.91.3133
Predominant Reaching Low769.50.7797
Predominant Reaching Low/Med585.71.0245
Predominant Reaching Medium517.11.1603
Predominant Reaching Med/High479.31.2519
Predominant Reaching High454.41.3204
SA/DSPL Upwind20.14SA/DSPL Downwind40.60
Scoring OptionTODTOT
5-Band Windward/Leeward Low1096.10.5474
5-Band Windward/Leeward Low/Med797.40.7525
5-Band Windward/Leeward Medium673.20.8913
5-Band Windward/Leeward Med/High608.20.9864
5-Band Windward/Leeward High580.51.0336
Windward/Leeward 60-40 Low1107.40.5418
Windward/Leeward 60-40 Low/Med809.40.7413
Windward/Leeward 60-40 Medium687.10.8732
Windward/Leeward 60-40 Med/High625.80.9588
Windward/Leeward 60-40 High601.60.9973
5-Band AP Low794.20.7555
5-Band AP Low/Med628.10.9553
5-Band AP Medium547.01.0969
5-Band AP Med/High503.61.1915
5-Band AP High481.11.2472
5-Band SF Bay Tour - Low944.10.6355
5-Band SF Bay Tour - Low/Med762.70.7867
5-Band SF Bay Tour - Medium649.10.9244
5-Band SF Bay Tour - Med/High590.61.0158
5-Band SF Bay Tour - High564.41.0631
Chicago-Mac Upwind0.9172
Chicago-Mac All Purpose0.9521
Chicago-Mac Downwind0.9813
Bayview-Mac Cove Island0.6917
Bayview-Mac Shore0.6964
Harvest Moon Regatta485.21.2366
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance608.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating608.90.9854
FinRating, kevyt tuuli1073.10.9319
FinRating, kova tuuli484.11.0327
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9854
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0819
Triple Number Coastal/Long Distance High1.2065
Triple Number Windward/Leeward Low0.6410
Triple Number Windward/Leeward Medium0.8757
Triple Number Windward/Leeward High0.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
For information
General Purpose Handicap (GPH)627.9
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low721.3
Triple Number Coastal/Long Distance Medium554.6
Triple Number Coastal/Long Distance High497.3
Triple Number Windward/Leeward Low936.0
Triple Number Windward/Leeward Medium685.2
Triple Number Windward/Leeward High600.1
Predominantly Upwind607.1
Predominantly Downwind565.0
Predominantly Reaching541.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0819
Triple Number Coastal/Long Distance High1.2065
Triple Number Windward/Leeward Low0.6410
Triple Number Windward/Leeward Medium0.8757
Triple Number Windward/Leeward High0.9998
Coastal/Long Distance0.9854
Predominantly Upwind0.9884
Predominantly Downwind1.0619
For information
General Purpose Handicap (GPH)627.9
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0739
Distanseseilas Trippeltall svak vind0.8318
Distanseseilas Trippeltall mellomvind1.0819
Distanseseilas Trippeltall sterk vind1.2065
Pølsebane Trippeltall svak vind0.6410
Pølsebane Trippeltall mellomvind0.8757
Pølsebane Trippeltall sterk vind0.9998
Motvind Singeltall0.9884
Medvind Singeltall1.0619
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Coastal/Long Distance608.90.9854
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind607.10.9884
Predominantly Downwind565.01.0619
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore568.31.0557
Cape Doctor Coastal469.01.2794
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0819
Triple Number Coastal/Long Distance High1.2065
Triple Number Windward/Leeward Low0.6410
Triple Number Windward/Leeward Medium0.8757
Triple Number Windward/Leeward High0.9998
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0819
Triple Number Coastal/Long Distance High1.2065
Triple Number Windward/Leeward Low0.6410
Triple Number Windward/Leeward Medium0.8757
Triple Number Windward/Leeward High0.9998
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Predominantly Upwind607.10.9884
Predominantly Downwind565.01.0619
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance608.90.9854
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium554.61.0819
Triple Number Coastal/Long Distance High497.31.2065
Triple Number Windward/Leeward Low936.00.6410
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1558.81034.7780.2648.5574.2536.3507.0459.4443.4
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low721.40.8318
Triple Number AP Medium554.71.0818
Triple Number AP High497.31.2065
Triple Number Windward/Leeward Low978.40.6132
Triple Number Windward/Leeward Medium685.20.8757
Triple Number Windward/Leeward High600.10.9998
Single Number Predominant Upwind633.70.9469
Single Number Predominant Reaching554.21.0826
Single Number Predominant Downwind590.11.0168
Predominant Upwind - Low886.10.6771
Predominant Upwind - Low/Med669.00.8968
Predominant Upwind - Medium586.71.0227
Predominant Upwind - Med/High547.91.0951
Predominant Upwind - High531.31.1292
Predominant Downwind Low861.30.6966
Predominant Downwind Low/Med636.30.9430
Predominant Downwind Medium545.21.1006
Predominant Downwind Med/High491.21.2215
Predominant Downwind High456.91.3133
Predominant Reaching Low769.50.7797
Predominant Reaching Low/Med585.71.0245
Predominant Reaching Medium517.11.1603
Predominant Reaching Med/High479.31.2519
Predominant Reaching High454.41.3204
SA/DSPL Upwind20.14SA/DSPL Downwind40.60
Scoring OptionTODTOT
5-Band Windward/Leeward Low1096.10.5474
5-Band Windward/Leeward Low/Med797.40.7525
5-Band Windward/Leeward Medium673.20.8913
5-Band Windward/Leeward Med/High608.20.9864
5-Band Windward/Leeward High580.51.0336
Windward/Leeward 60-40 Low1107.40.5418
Windward/Leeward 60-40 Low/Med809.40.7413
Windward/Leeward 60-40 Medium687.10.8732
Windward/Leeward 60-40 Med/High625.80.9588
Windward/Leeward 60-40 High601.60.9973
5-Band AP Low794.20.7555
5-Band AP Low/Med628.10.9553
5-Band AP Medium547.01.0969
5-Band AP Med/High503.61.1915
5-Band AP High481.11.2472
5-Band SF Bay Tour - Low944.10.6355
5-Band SF Bay Tour - Low/Med762.70.7867
5-Band SF Bay Tour - Medium649.10.9244
5-Band SF Bay Tour - Med/High590.61.0158
5-Band SF Bay Tour - High564.41.0631
Chicago-Mac Upwind0.9172
Chicago-Mac All Purpose0.9521
Chicago-Mac Downwind0.9813
Bayview-Mac Cove Island0.6917
Bayview-Mac Shore0.6964
Harvest Moon Regatta485.21.2366
Club Certificate2025
Grandma BenNOR 15080
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassScanner 391MeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA11.720Max. Beam3.618Draft1.899Displacement5,787Wetted area25.81IMS L9.992LSM09.744Acc. length11.716Sink (kg/mm) 19.25
VCGD-0.029VCGM0.017RM Rated (kg·m) 123.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight663Declared crew weightN/A
PROPELLER
Propeller TypeFolding 3 blades
InstallationIn ApertureTwin screwNoHydro generatorNo
PRD0.400PBWPIPA0.0078
APH0.000APT0.000APB0.000
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P14.250IG13.800ISP13.920MDT10.124MDL10.215MDT20.000MDL20.000TLTaperMW0.000GO0.000
E4.750J4.200BAS1.601FSDFoilSFJ0.000SPL0.000WPLTPS4.700BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.029Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
Grandma BenNOR 15080
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment625-2024051411050.180.951.702.963.9039.2914/05/2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment625-2024051411110.060.561.122.032.883.6513.31YesNo 26.0014/05/2024
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment625-20240514111714.1712.1513.168.597.74111%92.3414/05/2024
CRUISER/RACER REQUIREMENTS*
Accommodation length11.7 mTable area0.55 m²Headroom1.80 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity142 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity84 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.