Club
Certificate
2023

Boat

Vellamo

NOR 5477

Norges Seilforbund
Sognsveien 73
0854 OSLO
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles43.9°42.0°40.2°38.8°38.4°38.1°38.4°
Beat VMG2.973.624.104.414.574.654.68
52°4.555.415.956.246.416.506.57
60°4.795.646.126.396.566.686.77
75°4.925.786.266.536.736.897.09
90°4.935.896.406.676.826.987.31
110°5.026.026.536.867.147.377.70
120°4.875.896.476.837.157.438.01
135°4.425.456.196.616.957.277.97
150°3.764.805.656.266.646.957.56
Run VMG3.264.154.925.566.106.517.10
Gybe Angles146.0°150.5°153.8°161.0°174.5°179.0°179.0°

APH: 629.9

CDL: 7.253

GPH: 708.1

CertNo: 4790

BOAT
ClassMAMBA 311 MHDesignerBengt KarlssonBuilderBK Marin AbAge date01/1983Series date01/1983Offset fileScale_Mamba31.offData file4790
HULL
Length Overall9.350 mMaximum Beam3.082 mDraft1.612 mDisplacement3,500 kgDLR7.9145IMS DivisionCruiser/RacerDynamic Allowance0.270%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight467 kgMinimum weight350 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail21.1221.62Headsail Luffed21.7021.70Headsail FlyingSymmetric59.9459.94Asymmetric
STORM SAIL AREAS (m²)
Trysail5.41Storm Jib6.97Heavy Weather Jib18.80
SAIL LIMITS
Headsails5  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.
ORC Ref  03440002SJAIssued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Vellamo

NOR 5477

Norges Seilforbund
Sognsveien 73
0854 OSLO
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG1210.9993.9879.0816.0786.9774.5769.6
52°791.5664.8605.2576.5561.3553.5548.0
60°752.3638.2588.2563.4548.6539.3531.9
75°731.8623.0575.5551.4535.1522.6507.5
90°730.5611.1562.2539.8528.1516.0492.7
110°717.2598.4551.0524.5504.5488.7467.6
120°738.8611.1556.4527.0503.8484.2449.7
135°814.7660.2581.9544.3518.1495.0451.7
150°956.6750.6637.0575.2542.4518.1476.1
Run VMG1104.6866.5732.4647.7589.7553.3507.0
Selected Courses
Windward / Leeward1157.8930.2805.7731.9688.3663.9638.3
All purpose895.3732.8651.3606.6580.8564.0541.7
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward767.60.7817
All purpose629.90.9525
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6741
Downwind "popa"0.8398
70% up, 30% down "Ilhabela"0.7165
30% up, 70% down "Ilhabela-inverso"0.7821
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Predominantly Upwind683.60.8778
Predominantly Downwind635.30.9445
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low814.10.7370
Triple Number All Purpose Medium625.60.9591
Triple Number All Purpose High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Predominantly Upwind683.60.8778
Predominantly Downwind635.30.9445
Predominantly Upwind Low915.30.6556
Predominantly Upwind Medium706.90.8488
Predominantly Upwind High651.90.9204
Predominantly Downwind Low875.90.6850
Predominantly Downwind Medium625.40.9593
Predominantly Downwind High527.91.1365
Chicago-Mac Upwind0.8606
Chicago-Mac All Purpose0.8907
Chicago-Mac Downwind0.9283
Bayview-Mac Cove Island0.8246
Bayview-Mac Shore0.8301
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching600.01.0000
Predominantly Reaching Low736.10.8151
Predominantly Reaching Medium593.61.0109
Predominantly Reaching High527.91.1366
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1140.20.5262
5-Band Low / Medium952.30.6301
5-Band Medium747.70.8024
5-Band Medium / High669.40.8963
5-Band High642.70.9335
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance684.1
Triple Number Coastal/Long Distance Low814.1
Triple Number Coastal/Long Distance Medium625.6
Triple Number Coastal/Long Distance High559.8
Triple Number Windward/Leeward Low1044.0
Triple Number Windward/Leeward Medium762.1
Triple Number Windward/Leeward High660.4
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7370
Triple Number Coastal/Long Distance Medium0.9591
Triple Number Coastal/Long Distance High1.0718
Triple Number Windward/Leeward Low0.5747
Triple Number Windward/Leeward Medium0.7873
Triple Number Windward/Leeward High0.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low814.1
Triple Number Coastal/Long Distance Medium625.6
Triple Number Coastal/Long Distance High559.8
Triple Number Windward/Leeward Low1044.0
Triple Number Windward/Leeward Medium762.1
Triple Number Windward/Leeward High660.4
Predominantly Upwind683.6
Predominantly Downwind635.3
Predominantly Reaching612.8
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7370
Triple Number Coastal/Long Distance Medium0.9591
Triple Number Coastal/Long Distance High1.0718
Triple Number Windward/Leeward Low0.5747
Triple Number Windward/Leeward Medium0.7873
Triple Number Windward/Leeward High0.9085
Coastal/Long Distance0.8771
Predominantly Upwind0.8778
Predominantly Downwind0.9445
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7370
Tretall Distanseseilas Mellomvind0.9591
Tretall Distanseseilas Mye vind1.0718
Tretall Pølsebane Lite vind0.5747
Tretall Pølsebane Mellomvind0.7873
Tretall Pølsebane Mye vind0.9085
Distanseseilas ett tall (OSN 8-16kn)0.8771
Distanseseilas ett tall (APH 6-20kn)0.9525
Enkeltall Motvind0.8778
Enkeltall Medvind0.9445
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Coastal/Long Distance684.10.8771
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind683.60.8778
Predominantly Downwind635.30.9445
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore646.00.9288
Cape Doctor Coastal548.41.0941
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7370
Triple Number Coastal/Long Distance Medium0.9591
Triple Number Coastal/Long Distance High1.0718
Triple Number Windward/Leeward Low0.5747
Triple Number Windward/Leeward Medium0.7873
Triple Number Windward/Leeward High0.9085
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7370
Triple Number Coastal/Long Distance Medium0.9591
Triple Number Coastal/Long Distance High1.0718
Triple Number Windward/Leeward Low0.5747
Triple Number Windward/Leeward Medium0.7873
Triple Number Windward/Leeward High0.9085
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Predominantly Upwind683.60.8778
Predominantly Downwind635.30.9445
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance684.10.8771
Triple Number Coastal/Long Distance Low814.10.7370
Triple Number Coastal/Long Distance Medium625.60.9591
Triple Number Coastal/Long Distance High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1152.5874.7729.4645.8602.0570.0519.2
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low814.10.7370
Triple Number All Purpose Medium625.60.9591
Triple Number All Purpose High559.81.0718
Triple Number Windward/Leeward Low1044.00.5747
Triple Number Windward/Leeward Medium762.10.7873
Triple Number Windward/Leeward High660.40.9085
Predominantly Upwind683.60.8778
Predominantly Downwind635.30.9445
Predominantly Upwind Low915.30.6556
Predominantly Upwind Medium706.90.8488
Predominantly Upwind High651.90.9204
Predominantly Downwind Low875.90.6850
Predominantly Downwind Medium625.40.9593
Predominantly Downwind High527.91.1365
Chicago-Mac Upwind0.8606
Chicago-Mac All Purpose0.8907
Chicago-Mac Downwind0.9283
Bayview-Mac Cove Island0.8246
Bayview-Mac Shore0.8301
Harvest Moon Regatta550.11.0907
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy651.00.9217
San Francisco Bay Medium758.80.7907
Predominantly Reaching600.01.0000
Predominantly Reaching Low736.10.8151
Predominantly Reaching Medium593.61.0109
Predominantly Reaching High527.91.1366
Windward/Leeward 60-40 Low1055.70.5684
Windward/Leeward 60-40 Medium790.20.7593
Windward/Leeward 60-40 High699.70.8576
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1140.20.5262
5-Band Low / Medium952.30.6301
5-Band Medium747.70.8024
5-Band Medium / High669.40.8963
5-Band High642.70.9335
ORC Ref  03440002SJAIssued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Vellamo

NOR 5477

Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMAMBA 311 MHMeasurementHINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA9.350Max. Beam3.082Draft1.612Displacement3,500Wetted area17.61IMS L7.809LSM07.618Acc. length9.350Sink (kg/mm) 12.73
VCGD-0.050VCGM-0.049RM Rated (kg·m) 60.3Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0033
EDL1.600ST10.050ST20.170
ST30.170ST40.100ST50.300
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders1Rotating mastNo
P10.300IG11.800ISP11.880MDT10.110MDL10.140MDT20.000MDL20.000TLNo TaperMW0.000GO0.000
E3.000J3.530BAS1.360FSDFoilSFJ0.000SPL3.610WPLTPS0.000BDMWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.050Flotation Date01/01/2015MeasurerComment
SFFP0.551FFMFF0.950LCFcl5.398SG0.0000
SAFP8.777FAMFA0.940LCFsh5.606HBI0.900
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03440002SJAIssued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Vellamo

NOR 5477

Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment235-2023090809180.130.731.342.312.9921.1208/09/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment235-2023032810120.070.500.951.953.004.1110.84NoNo 21.7028/03/2023
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment4790-20040124120211.0711.0711.070.000.0059.9401/01/1753
ORC Ref  03440002SJAIssued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org