Double HandedClub 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 Angles43.7°43.7°41.6°40.8°40.1°39.7°39.7°40.1°41.9°
Beat VMG2.383.314.044.504.734.844.894.914.75
52°3.735.076.046.606.887.007.077.127.07
60°3.995.366.316.847.107.237.307.377.35
75°4.185.586.527.047.337.507.627.757.79
90°4.245.726.737.237.447.647.838.108.25
110°4.305.836.917.467.818.098.298.638.82
120°4.155.686.807.407.818.188.539.079.52
135°3.615.086.287.087.577.988.399.3410.90
150°2.974.265.406.377.067.507.878.629.59
Run VMG2.583.694.685.516.136.607.007.668.34
Gybe Angles142.3°142.3°146.7°149.6°152.3°157.6°162.4°163.5°158.3°
APH ToD:567.6CDL: 8.776APH ToT: 1.0572CertNo: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 weight170 kg(default)Minimum weight120 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.
Double HandedClub 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 VMG1511.01087.8891.3800.5760.5744.2735.8733.6757.8
52°965.7710.3595.9545.0523.6514.6509.3505.3509.4
60°903.2671.6570.2526.0506.8497.8492.9488.2489.6
75°860.5644.9552.0511.1491.2479.7472.4464.4462.2
90°849.5629.9534.5498.2484.1471.4459.8444.2436.4
110°837.8617.5521.1482.9460.9444.8434.3417.1408.0
120°867.3633.8529.6486.4460.9440.2422.3397.0378.0
135°996.7709.0573.5508.6475.8451.2428.9385.4330.4
150°1210.6846.0666.9565.5510.2480.0457.6417.6375.5
Run VMG1398.0976.8770.1653.0587.1545.5514.2470.0431.7
Selected Courses
Windward / Leeward1454.21032.3830.7726.7673.8644.9625.0601.8594.7
All purpose1096.2791.2649.6581.9548.6528.9515.0496.2486.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward703.70.8526
All purpose567.61.0572
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7300
Downwind "popa"0.9299
70% up, 30% down "Ilhabela"0.7803
30% up, 70% down "Ilhabela-inverso"0.8593
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Predominantly Upwind620.10.9675
Predominantly Downwind567.51.0572
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low720.40.8329
Triple Number AP Medium563.21.0653
Triple Number AP High511.41.1732
Triple Number Windward/Leeward Low973.40.6164
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Single Number Predominant Upwind646.70.9278
Single Number Predominant Reaching560.71.0701
Single Number Predominant Downwind592.51.0126
Predominant Upwind - Low883.50.6791
Predominant Upwind - Low/Med675.70.8880
Predominant Upwind - Medium601.70.9972
Predominant Upwind - Med/High568.01.0564
Predominant Upwind - High555.21.0807
Predominant Downwind Low856.40.7006
Predominant Downwind Low/Med636.40.9428
Predominant Downwind Medium548.91.0931
Predominant Downwind Med/High496.21.2091
Predominant Downwind High462.71.2967
Predominant Reaching Low768.50.7807
Predominant Reaching Low/Med589.71.0174
Predominant Reaching Medium524.91.1430
Predominant Reaching Med/High487.91.2296
Predominant Reaching High464.61.2914
SA/DSPL Upwind20.14SA/DSPL Downwind40.60
Scoring OptionTODTOT
5-Band Windward/Leeward Low1087.50.5517
5-Band Windward/Leeward Low/Med800.60.7495
5-Band Windward/Leeward Medium686.70.8737
5-Band Windward/Leeward Med/High628.50.9546
5-Band Windward/Leeward High604.60.9924
Windward/Leeward 60-40 Low1098.90.5460
Windward/Leeward 60-40 Low/Med814.20.7369
Windward/Leeward 60-40 Medium704.00.8522
Windward/Leeward 60-40 Med/High650.60.9222
Windward/Leeward 60-40 High631.30.9504
5-Band AP Low791.50.7580
5-Band AP Low/Med631.70.9499
5-Band AP Medium556.41.0784
5-Band AP Med/High517.01.1606
5-Band AP High497.71.2056
5-Band SF Bay Tour - Low938.40.6394
5-Band SF Bay Tour - Low/Med766.50.7828
5-Band SF Bay Tour - Medium663.00.9049
5-Band SF Bay Tour - Med/High611.30.9815
5-Band SF Bay Tour - High589.21.0183
Chicago-Mac Upwind0.9015
Chicago-Mac All Purpose0.9420
Chicago-Mac Downwind0.9785
Bayview-Mac Cove Island0.6917
Bayview-Mac Shore0.6962
Harvest Moon Regatta490.11.2242
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance617.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating617.90.9711
FinRating, kevyt tuuli1064.90.9390
FinRating, kova tuuli501.10.9978
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9711
Triple Number Coastal/Long Distance Low0.8329
Triple Number Coastal/Long Distance Medium1.0654
Triple Number Coastal/Long Distance High1.1732
Triple Number Windward/Leeward Low0.6441
Triple Number Windward/Leeward Medium0.8605
Triple Number Windward/Leeward High0.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
For information
General Purpose Handicap (GPH)635.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low720.4
Triple Number Coastal/Long Distance Medium563.2
Triple Number Coastal/Long Distance High511.4
Triple Number Windward/Leeward Low931.5
Triple Number Windward/Leeward Medium697.3
Triple Number Windward/Leeward High621.2
Predominantly Upwind620.1
Predominantly Downwind567.5
Predominantly Reaching545.9
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8329
Triple Number Coastal/Long Distance Medium1.0654
Triple Number Coastal/Long Distance High1.1732
Triple Number Windward/Leeward Low0.6441
Triple Number Windward/Leeward Medium0.8605
Triple Number Windward/Leeward High0.9658
Coastal/Long Distance0.9711
Predominantly Upwind0.9675
Predominantly Downwind1.0572
For information
General Purpose Handicap (GPH)635.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0572
Distanseseilas Trippeltall svak vind0.8329
Distanseseilas Trippeltall mellomvind1.0654
Distanseseilas Trippeltall sterk vind1.1732
Pølsebane Trippeltall svak vind0.6441
Pølsebane Trippeltall mellomvind0.8605
Pølsebane Trippeltall sterk vind0.9658
Motvind Singeltall0.9675
Medvind Singeltall1.0572
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Coastal/Long Distance617.90.9711
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind620.10.9675
Predominantly Downwind567.51.0572
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore596.91.0053
Cape Doctor Coastal489.01.2269
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8329
Triple Number Coastal/Long Distance Medium1.0654
Triple Number Coastal/Long Distance High1.1732
Triple Number Windward/Leeward Low0.6441
Triple Number Windward/Leeward Medium0.8605
Triple Number Windward/Leeward High0.9658
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8329
Triple Number Coastal/Long Distance Medium1.0654
Triple Number Coastal/Long Distance High1.1732
Triple Number Windward/Leeward Low0.6441
Triple Number Windward/Leeward Medium0.8605
Triple Number Windward/Leeward High0.9658
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Predominantly Upwind620.10.9675
Predominantly Downwind567.51.0572
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance617.90.9711
Triple Number Coastal/Long Distance Low720.40.8329
Triple Number Coastal/Long Distance Medium563.21.0654
Triple Number Coastal/Long Distance High511.41.1732
Triple Number Windward/Leeward Low931.50.6441
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1537.21026.8779.6654.9586.3549.3519.2472.3460.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low720.40.8329
Triple Number AP Medium563.21.0653
Triple Number AP High511.41.1732
Triple Number Windward/Leeward Low973.40.6164
Triple Number Windward/Leeward Medium697.30.8605
Triple Number Windward/Leeward High621.20.9658
Single Number Predominant Upwind646.70.9278
Single Number Predominant Reaching560.71.0701
Single Number Predominant Downwind592.51.0126
Predominant Upwind - Low883.50.6791
Predominant Upwind - Low/Med675.70.8880
Predominant Upwind - Medium601.70.9972
Predominant Upwind - Med/High568.01.0564
Predominant Upwind - High555.21.0807
Predominant Downwind Low856.40.7006
Predominant Downwind Low/Med636.40.9428
Predominant Downwind Medium548.91.0931
Predominant Downwind Med/High496.21.2091
Predominant Downwind High462.71.2967
Predominant Reaching Low768.50.7807
Predominant Reaching Low/Med589.71.0174
Predominant Reaching Medium524.91.1430
Predominant Reaching Med/High487.91.2296
Predominant Reaching High464.61.2914
SA/DSPL Upwind20.14SA/DSPL Downwind40.60
Scoring OptionTODTOT
5-Band Windward/Leeward Low1087.50.5517
5-Band Windward/Leeward Low/Med800.60.7495
5-Band Windward/Leeward Medium686.70.8737
5-Band Windward/Leeward Med/High628.50.9546
5-Band Windward/Leeward High604.60.9924
Windward/Leeward 60-40 Low1098.90.5460
Windward/Leeward 60-40 Low/Med814.20.7369
Windward/Leeward 60-40 Medium704.00.8522
Windward/Leeward 60-40 Med/High650.60.9222
Windward/Leeward 60-40 High631.30.9504
5-Band AP Low791.50.7580
5-Band AP Low/Med631.70.9499
5-Band AP Medium556.41.0784
5-Band AP Med/High517.01.1606
5-Band AP High497.71.2056
5-Band SF Bay Tour - Low938.40.6394
5-Band SF Bay Tour - Low/Med766.50.7828
5-Band SF Bay Tour - Medium663.00.9049
5-Band SF Bay Tour - Med/High611.30.9815
5-Band SF Bay Tour - High589.21.0183
Chicago-Mac Upwind0.9015
Chicago-Mac All Purpose0.9420
Chicago-Mac Downwind0.9785
Bayview-Mac Cove Island0.6917
Bayview-Mac Shore0.6962
Harvest Moon Regatta490.11.2242
Double HandedClub 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 L9.841LSM09.744Acc. length11.716Sink (kg/mm) 19.25
VCGD-0.029VCGM0.017RM Rated (kg·m) 123.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared 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
Double HandedClub 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.