Non Spin/HSFClub Certificate2025
VellamoNOR 5477
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 Angles44.0°44.0°42.1°40.5°39.1°38.6°38.2°38.3°39.3°
Beat VMG2.183.003.664.124.424.564.634.674.61
52°3.414.615.485.996.276.426.496.566.56
60°3.644.875.716.176.426.586.676.766.78
75°3.775.035.876.316.576.766.907.077.15
90°3.674.935.806.316.596.847.047.317.50
110°3.254.495.476.156.546.837.097.588.07
120°3.034.245.235.976.426.726.997.528.09
135°2.583.714.725.526.126.496.777.297.85
150°2.153.184.154.975.676.196.537.057.56
Run VMG1.862.753.614.405.115.736.206.807.30
Gybe Angles149.4°149.4°155.0°172.1°173.2°174.8°176.6°177.7°177.5°
APH ToD:653.9CDL: 7.267APH ToT: 0.9176CertNo:4790
BOAT
ClassMAMBA 311DesignerBengtKarlssonBuilderBK Marin AbAge date01/1983Series date01/1983Offset fileScale_Mamba31.offData file4790
HULL
Length Overall9.350 mMaximum Beam3.082 mDraft1.613 mDisplacement3,502 kgDLR7.9165IMS DivisionCruiser/RacerDynamic Allowance0.330%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight467 kg(default)Minimum weight337 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail25.0425.41Headsail Luffed21.6921.69Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail7.43Storm Jib5.16Heavy Weather Jib13.91
SAIL LIMITS
Headsails1
✱ One set on the forestay
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
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.
Non Spin/HSFClub Certificate2025
VellamoNOR 5477
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 VMG1654.51198.4984.8873.7815.4789.7777.3771.3781.5
52°1055.6780.3657.4600.7574.2560.9554.4548.6548.4
60°990.1738.8630.0583.3560.4547.3539.7532.7530.8
75°954.7715.2613.0570.4548.0532.6521.5509.1503.3
90°979.8729.8620.3570.9545.9526.4511.3492.6480.2
110°1108.9801.8658.0585.6550.5527.4507.9475.0445.9
120°1187.4849.8688.5602.8560.6535.3514.7478.9444.8
135°1393.0969.5763.4651.9588.4554.3531.4493.5458.5
150°1675.41132.7867.3723.7634.8581.8551.4510.7476.4
Run VMG1936.71307.9996.7818.5704.8628.4580.4529.5493.3
Selected Courses
Windward / Leeward1792.21253.1990.8846.1760.1709.0678.9650.4637.4
All purpose1340.4956.6774.3679.5626.9596.3577.1554.2539.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward801.20.7489
All purpose653.90.9176
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6763
Downwind "popa"0.7545
70% up, 30% down "Ilhabela"0.6980
30% up, 70% down "Ilhabela-inverso"0.7292
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Predominantly Upwind696.00.8620
Predominantly Downwind679.10.8836
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low865.40.6933
Triple Number AP Medium649.10.9243
Triple Number AP High573.31.0465
Triple Number Windward/Leeward Low1174.80.5107
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Single Number Predominant Upwind725.30.8273
Single Number Predominant Reaching656.10.9145
Single Number Predominant Downwind715.00.8391
Predominant Upwind - Low1019.50.5885
Predominant Upwind - Low/Med769.70.7796
Predominant Upwind - Medium670.70.8945
Predominant Upwind - Med/High622.20.9643
Predominant Upwind - High605.50.9909
Predominant Downwind Low1097.50.5467
Predominant Downwind Low/Med785.60.7638
Predominant Downwind Medium650.10.9230
Predominant Downwind Med/High571.11.0506
Predominant Downwind High534.71.1222
Predominant Reaching Low936.40.6408
Predominant Reaching Low/Med702.00.8548
Predominant Reaching Medium607.10.9883
Predominant Reaching Med/High554.51.0821
Predominant Reaching High529.41.1335
SA/DSPL Upwind20.18SA/DSPL Downwind20.18
Scoring OptionTODTOT
5-Band Windward/Leeward Low1323.20.4535
5-Band Windward/Leeward Low/Med944.40.6353
5-Band Windward/Leeward Medium778.30.7709
5-Band Windward/Leeward Med/High686.00.8747
5-Band Windward/Leeward High653.10.9187
Windward/Leeward 60-40 Low1310.30.4579
Windward/Leeward 60-40 Low/Med945.90.6343
Windward/Leeward 60-40 Medium789.00.7605
Windward/Leeward 60-40 Med/High705.10.8510
Windward/Leeward 60-40 High677.30.8859
5-Band AP Low971.60.6175
5-Band AP Low/Med746.00.8043
5-Band AP Medium638.60.9395
5-Band AP Med/High580.71.0333
5-Band AP High555.61.0798
5-Band SF Bay Tour - Low1129.90.5310
5-Band SF Bay Tour - Low/Med902.00.6652
5-Band SF Bay Tour - Medium753.30.7965
5-Band SF Bay Tour - Med/High673.90.8904
5-Band SF Bay Tour - High645.00.9302
Chicago-Mac Upwind0.8001
Chicago-Mac All Purpose0.8071
Chicago-Mac Downwind0.8053
Bayview-Mac Cove Island0.5758
Bayview-Mac Shore0.5822
Harvest Moon Regatta569.71.0531
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance713.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating704.00.8523
FinRating, kevyt tuuli1303.20.7673
FinRating, kova tuuli560.00.8928
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8411
Triple Number Coastal/Long Distance Low0.6933
Triple Number Coastal/Long Distance Medium0.9244
Triple Number Coastal/Long Distance High1.0465
Triple Number Windward/Leeward Low0.5348
Triple Number Windward/Leeward Medium0.7545
Triple Number Windward/Leeward High0.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
For information
General Purpose Handicap (GPH)739.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low865.4
Triple Number Coastal/Long Distance Medium649.1
Triple Number Coastal/Long Distance High573.3
Triple Number Windward/Leeward Low1121.9
Triple Number Windward/Leeward Medium795.2
Triple Number Windward/Leeward High675.8
Predominantly Upwind696.0
Predominantly Downwind679.1
Predominantly Reaching644.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6933
Triple Number Coastal/Long Distance Medium0.9244
Triple Number Coastal/Long Distance High1.0465
Triple Number Windward/Leeward Low0.5348
Triple Number Windward/Leeward Medium0.7545
Triple Number Windward/Leeward High0.8879
Coastal/Long Distance0.8411
Predominantly Upwind0.8620
Predominantly Downwind0.8836
For information
General Purpose Handicap (GPH)739.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9176
Distanseseilas Trippeltall svak vind0.6933
Distanseseilas Trippeltall mellomvind0.9244
Distanseseilas Trippeltall sterk vind1.0465
Pølsebane Trippeltall svak vind0.5348
Pølsebane Trippeltall mellomvind0.7545
Pølsebane Trippeltall sterk vind0.8879
Motvind Singeltall0.8620
Medvind Singeltall0.8836
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Coastal/Long Distance713.30.8411
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind696.00.8620
Predominantly Downwind679.10.8836
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore641.30.9356
Cape Doctor Coastal543.91.1031
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6933
Triple Number Coastal/Long Distance Medium0.9244
Triple Number Coastal/Long Distance High1.0465
Triple Number Windward/Leeward Low0.5348
Triple Number Windward/Leeward Medium0.7545
Triple Number Windward/Leeward High0.8879
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6933
Triple Number Coastal/Long Distance Medium0.9244
Triple Number Coastal/Long Distance High1.0465
Triple Number Windward/Leeward Low0.5348
Triple Number Windward/Leeward Medium0.7545
Triple Number Windward/Leeward High0.8879
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Predominantly Upwind696.00.8620
Predominantly Downwind679.10.8836
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance713.30.8411
Triple Number Coastal/Long Distance Low865.40.6933
Triple Number Coastal/Long Distance Medium649.10.9244
Triple Number Coastal/Long Distance High573.31.0465
Triple Number Windward/Leeward Low1121.90.5348
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1931.81258.6932.9764.7668.3618.5583.8532.6515.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low865.40.6933
Triple Number AP Medium649.10.9243
Triple Number AP High573.31.0465
Triple Number Windward/Leeward Low1174.80.5107
Triple Number Windward/Leeward Medium795.20.7545
Triple Number Windward/Leeward High675.80.8879
Single Number Predominant Upwind725.30.8273
Single Number Predominant Reaching656.10.9145
Single Number Predominant Downwind715.00.8391
Predominant Upwind - Low1019.50.5885
Predominant Upwind - Low/Med769.70.7796
Predominant Upwind - Medium670.70.8945
Predominant Upwind - Med/High622.20.9643
Predominant Upwind - High605.50.9909
Predominant Downwind Low1097.50.5467
Predominant Downwind Low/Med785.60.7638
Predominant Downwind Medium650.10.9230
Predominant Downwind Med/High571.11.0506
Predominant Downwind High534.71.1222
Predominant Reaching Low936.40.6408
Predominant Reaching Low/Med702.00.8548
Predominant Reaching Medium607.10.9883
Predominant Reaching Med/High554.51.0821
Predominant Reaching High529.41.1335
SA/DSPL Upwind20.18SA/DSPL Downwind20.18
Scoring OptionTODTOT
5-Band Windward/Leeward Low1323.20.4535
5-Band Windward/Leeward Low/Med944.40.6353
5-Band Windward/Leeward Medium778.30.7709
5-Band Windward/Leeward Med/High686.00.8747
5-Band Windward/Leeward High653.10.9187
Windward/Leeward 60-40 Low1310.30.4579
Windward/Leeward 60-40 Low/Med945.90.6343
Windward/Leeward 60-40 Medium789.00.7605
Windward/Leeward 60-40 Med/High705.10.8510
Windward/Leeward 60-40 High677.30.8859
5-Band AP Low971.60.6175
5-Band AP Low/Med746.00.8043
5-Band AP Medium638.60.9395
5-Band AP Med/High580.71.0333
5-Band AP High555.61.0798
5-Band SF Bay Tour - Low1129.90.5310
5-Band SF Bay Tour - Low/Med902.00.6652
5-Band SF Bay Tour - Medium753.30.7965
5-Band SF Bay Tour - Med/High673.90.8904
5-Band SF Bay Tour - High645.00.9302
Chicago-Mac Upwind0.8001
Chicago-Mac All Purpose0.8071
Chicago-Mac Downwind0.8053
Bayview-Mac Cove Island0.5758
Bayview-Mac Shore0.5822
Harvest Moon Regatta569.71.0531
Non Spin/HSFClub Certificate2025
VellamoNOR 5477
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMAMBA 311MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.350Max. Beam3.082Draft1.613Displacement3,502Wetted area17.61IMS L7.825LSM07.619Acc. length9.325Sink (kg/mm) 12.73
VCGD-0.050VCGM-0.049RM Rated (kg·m) 60.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight467Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0033
EDL1.600ST10.050ST20.170
ST30.170ST40.100ST50.300
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P11.780IG10.150ISP10.260MDT10.117MDL10.170MDT20.000MDL20.000TLNo TaperMW0.000GO0.000
E3.600J3.430BAS1.360FSDFoilSFJ0.310SPL3.610WPLTPS0.000BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.050Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
VellamoNOR 5477
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment235-2023090809180.130.731.342.312.9925.0408/09/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment235-2023032810120.070.490.951.953.004.1110.84NoNo 21.6928/03/2023
CRUISER/RACER REQUIREMENTS*
Accommodation length9.3 mTable area0.44 m²Headroom1.65 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity66 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity36 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.