Club
Certificate
Non Spinnaker
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°4.555.425.956.256.416.506.57
60°4.795.646.126.396.566.686.77
75°4.925.786.266.536.736.897.09
90°4.825.706.246.556.786.987.31
110°4.325.316.036.466.757.017.49
120°4.095.095.866.346.666.927.44
135°3.614.615.416.036.436.717.22
150°3.104.064.885.576.116.466.98
Run VMG2.693.534.304.995.606.096.70
Gybe Angles150.2°155.0°164.0°170.3°174.8°179.0°179.0°

APH: 660.9

CDL: 7.253

GPH: 748.7

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 kgDLR7.9151IMS DivisionCruiser/RacerDynamic Allowance0.320%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 FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail5.41Storm Jib6.97Heavy Weather Jib18.80
SAIL LIMITS
Headsails5  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.
ORC Ref  03440002SI0Issued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
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 VMG1210.4993.6878.8815.9787.0774.6769.9
52°791.1664.6605.1576.5561.3553.5548.1
60°751.9638.0588.1563.3548.6539.3532.0
75°731.5622.8575.4551.4535.0522.5507.6
90°747.1631.1576.6549.5531.0515.9492.6
110°833.0677.7596.9557.4533.2513.5480.8
120°879.6707.3614.6567.6540.8519.9484.2
135°997.7781.4665.0596.8559.9536.3498.6
150°1161.2887.0738.2646.1589.6557.0515.9
Run VMG1340.51019.6837.9722.1642.9591.1537.2
Selected Courses
Windward / Leeward1275.51006.6858.3769.0715.0682.9653.6
All purpose977.2787.9688.5632.5599.9579.8556.3
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward810.80.7401
All purpose660.90.9079
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6741
Downwind "popa"0.7380
70% up, 30% down "Ilhabela"0.6921
30% up, 70% down "Ilhabela-inverso"0.7176
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Predominantly Upwind701.40.8554
Predominantly Downwind689.80.8699
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low882.60.6798
Triple Number All Purpose Medium656.00.9147
Triple Number All Purpose High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Predominantly Upwind701.40.8554
Predominantly Downwind689.80.8699
Predominantly Upwind Low951.50.6306
Predominantly Upwind Medium712.10.8426
Predominantly Upwind High654.60.9166
Predominantly Downwind Low1002.70.5984
Predominantly Downwind Medium690.90.8684
Predominantly Downwind High560.61.0703
Chicago-Mac Upwind0.8384
Chicago-Mac All Purpose0.8434
Chicago-Mac Downwind0.8515
Bayview-Mac Cove Island0.7798
Bayview-Mac Shore0.7955
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching630.20.9521
Predominantly Reaching Low803.90.7464
Predominantly Reaching Medium628.30.9549
Predominantly Reaching High545.21.1005
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1254.70.4782
5-Band Low / Medium1032.10.5813
5-Band Medium787.40.7620
5-Band Medium / High690.60.8688
5-Band High658.60.9110
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance721.1
Triple Number Coastal/Long Distance Low882.6
Triple Number Coastal/Long Distance Medium656.0
Triple Number Coastal/Long Distance High576.0
Triple Number Windward/Leeward Low1140.9
Triple Number Windward/Leeward Medium805.0
Triple Number Windward/Leeward High679.9
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6798
Triple Number Coastal/Long Distance Medium0.9147
Triple Number Coastal/Long Distance High1.0416
Triple Number Windward/Leeward Low0.5259
Triple Number Windward/Leeward Medium0.7453
Triple Number Windward/Leeward High0.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low882.6
Triple Number Coastal/Long Distance Medium656.0
Triple Number Coastal/Long Distance High576.0
Triple Number Windward/Leeward Low1140.9
Triple Number Windward/Leeward Medium805.0
Triple Number Windward/Leeward High679.9
Predominantly Upwind701.4
Predominantly Downwind689.8
Predominantly Reaching653.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6798
Triple Number Coastal/Long Distance Medium0.9147
Triple Number Coastal/Long Distance High1.0416
Triple Number Windward/Leeward Low0.5259
Triple Number Windward/Leeward Medium0.7453
Triple Number Windward/Leeward High0.8825
Coastal/Long Distance0.8321
Predominantly Upwind0.8554
Predominantly Downwind0.8699
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.6798
Tretall Distanseseilas Mellomvind0.9147
Tretall Distanseseilas Mye vind1.0416
Tretall Pølsebane Lite vind0.5259
Tretall Pølsebane Mellomvind0.7453
Tretall Pølsebane Mye vind0.8825
Distanseseilas ett tall (OSN 8-16kn)0.8321
Distanseseilas ett tall (APH 6-20kn)0.9079
Enkeltall Motvind0.8554
Enkeltall Medvind0.8699
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Coastal/Long Distance721.10.8321
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind701.40.8554
Predominantly Downwind689.80.8699
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore662.40.9059
Cape Doctor Coastal563.41.0650
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6798
Triple Number Coastal/Long Distance Medium0.9147
Triple Number Coastal/Long Distance High1.0416
Triple Number Windward/Leeward Low0.5259
Triple Number Windward/Leeward Medium0.7453
Triple Number Windward/Leeward High0.8825
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6798
Triple Number Coastal/Long Distance Medium0.9147
Triple Number Coastal/Long Distance High1.0416
Triple Number Windward/Leeward Low0.5259
Triple Number Windward/Leeward Medium0.7453
Triple Number Windward/Leeward High0.8825
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Predominantly Upwind701.40.8554
Predominantly Downwind689.80.8699
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance721.10.8321
Triple Number Coastal/Long Distance Low882.60.6798
Triple Number Coastal/Long Distance Medium656.00.9147
Triple Number Coastal/Long Distance High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1282.0948.4775.3674.6622.6586.8534.9
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low882.60.6798
Triple Number All Purpose Medium656.00.9147
Triple Number All Purpose High576.01.0416
Triple Number Windward/Leeward Low1140.90.5259
Triple Number Windward/Leeward Medium805.00.7453
Triple Number Windward/Leeward High679.90.8825
Predominantly Upwind701.40.8554
Predominantly Downwind689.80.8699
Predominantly Upwind Low951.50.6306
Predominantly Upwind Medium712.10.8426
Predominantly Upwind High654.60.9166
Predominantly Downwind Low1002.70.5984
Predominantly Downwind Medium690.90.8684
Predominantly Downwind High560.61.0703
Chicago-Mac Upwind0.8384
Chicago-Mac All Purpose0.8434
Chicago-Mac Downwind0.8515
Bayview-Mac Cove Island0.7798
Bayview-Mac Shore0.7955
Harvest Moon Regatta575.61.0423
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy671.40.8937
San Francisco Bay Medium801.60.7485
Predominantly Reaching630.20.9521
Predominantly Reaching Low803.90.7464
Predominantly Reaching Medium628.30.9549
Predominantly Reaching High545.21.1005
Windward/Leeward 60-40 Low1133.20.5295
Windward/Leeward 60-40 Medium818.50.7330
Windward/Leeward 60-40 High712.60.8420
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1254.70.4782
5-Band Low / Medium1032.10.5813
5-Band Medium787.40.7620
5-Band Medium / High690.60.8688
5-Band High658.60.9110
ORC Ref  03440002SI0Issued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
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 L7.807LSM07.618Acc. 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  03440002SI0Issued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
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
ORC Ref  03440002SI0Issued on 19/09/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org