Club
Certificate
2023

Boat

MO GRINS

USA 208

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles42.0°38.8°38.2°38.4°38.8°39.4°40.5°
Beat VMG3.634.174.334.394.404.414.38
52°5.456.036.286.436.536.596.60
60°5.686.336.666.877.037.147.15
75°5.836.697.277.677.968.228.52
90°5.756.707.728.408.909.289.82
110°5.906.867.578.359.5210.3311.41
120°5.796.977.958.749.4910.1812.10
135°5.306.437.849.2310.3211.2612.98
150°4.485.606.567.959.4010.9213.93
Run VMG3.884.855.686.898.149.4612.07
Gybe Angles143.3°148.9°140.6°142.0°144.1°146.0°150.3°

APH: 546.2

CDL: 6.300

GPH: 610.8

CertNo: USA208

BOAT
ClassViper 640DesignerBrian BennettBuilderRondar RaceboatsAge date01/2012Series date01/1996Offset fileViper640.offData fileUSA 208
HULL
Length Overall6.467 mMaximum Beam2.420 mDraft1.399 mDisplacement319 kgDLR1.8071IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight270 kgMinimum weight185 kg * when appliedNon Manual PowerNoCrew Arm ExtensionLoose or no lifelines
SAIL AREAS (m²)
MeasuredRatedMainsail15.3115.90Headsail Luffed7.867.86Headsail FlyingSymmetricAsymmetric39.8639.86 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail4.05Storm Jib2.49Heavy Weather Jib6.71
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
friessaildesign@gmail.com
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  04560002OQSIssued on 20/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

MO GRINS

USA 208

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG990.7862.6830.8820.6818.0817.1821.7
52°660.5597.2572.8559.5551.4546.3545.4
60°634.3569.0540.8524.0512.4504.1503.4
75°617.5538.3495.1469.6452.0438.2422.8
90°626.4537.5466.4428.7404.7387.8366.6
110°610.4524.4475.7431.0378.1348.5315.6
120°622.0516.7453.1411.8379.4353.7297.5
135°679.5560.1459.0390.0348.8319.8277.4
150°802.9643.2549.1452.8383.0329.6258.4
Run VMG927.1742.7634.1522.8442.3380.6298.2
Selected Courses
Windward / Leeward958.9802.7732.4671.7630.1598.9560.0
All purpose747.7635.6576.5532.2500.5477.9449.6
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward690.10.8694
All purpose546.21.0984
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7045
Downwind "popa"1.0639
70% up, 30% down "Ilhabela"0.7840
30% up, 70% down "Ilhabela-inverso"0.9227
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Predominantly Upwind623.20.9628
Predominantly Downwind520.81.1521
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low691.60.8675
Triple Number All Purpose Medium547.61.0956
Triple Number All Purpose High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Predominantly Upwind623.20.9628
Predominantly Downwind520.81.1521
Predominantly Upwind Low776.30.7729
Predominantly Upwind Medium667.70.8987
Predominantly Upwind High642.60.9338
Predominantly Downwind Low742.80.8078
Predominantly Downwind Medium504.61.1890
Predominantly Downwind High369.51.6240
Chicago-Mac Upwind0.9468
Chicago-Mac All Purpose1.0293
Chicago-Mac Downwind1.1232
Bayview-Mac Cove Island0.9645
Bayview-Mac Shore0.9639
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching502.11.1949
Predominantly Reaching Low629.30.9535
Predominantly Reaching Medium496.61.2083
Predominantly Reaching High415.11.4454
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low946.90.6337
5-Band Low / Medium821.10.7307
5-Band Medium679.90.8825
5-Band Medium / High603.70.9938
5-Band High566.71.0588
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance596.9
Triple Number Coastal/Long Distance Low691.6
Triple Number Coastal/Long Distance Medium547.6
Triple Number Coastal/Long Distance High472.9
Triple Number Windward/Leeward Low880.8
Triple Number Windward/Leeward Medium692.4
Triple Number Windward/Leeward High592.1
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8675
Triple Number Coastal/Long Distance Medium1.0956
Triple Number Coastal/Long Distance High1.2687
Triple Number Windward/Leeward Low0.6812
Triple Number Windward/Leeward Medium0.8665
Triple Number Windward/Leeward High1.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low691.6
Triple Number Coastal/Long Distance Medium547.6
Triple Number Coastal/Long Distance High472.9
Triple Number Windward/Leeward Low880.8
Triple Number Windward/Leeward Medium692.4
Triple Number Windward/Leeward High592.1
Predominantly Upwind623.2
Predominantly Downwind520.8
Predominantly Reaching504.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8675
Triple Number Coastal/Long Distance Medium1.0956
Triple Number Coastal/Long Distance High1.2687
Triple Number Windward/Leeward Low0.6812
Triple Number Windward/Leeward Medium0.8665
Triple Number Windward/Leeward High1.0134
Coastal/Long Distance1.0052
Predominantly Upwind0.9628
Predominantly Downwind1.1521
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8675
Tretall Distanseseilas Mellomvind1.0956
Tretall Distanseseilas Mye vind1.2687
Tretall Pølsebane Lite vind0.6812
Tretall Pølsebane Mellomvind0.8665
Tretall Pølsebane Mye vind1.0134
Distanseseilas ett tall (OSN 8-16kn)1.0052
Distanseseilas ett tall (APH 6-20kn)1.0984
Enkeltall Motvind0.9628
Enkeltall Medvind1.1521
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Coastal/Long Distance596.91.0052
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind623.20.9628
Predominantly Downwind520.81.1521
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore571.61.0496
Cape Doctor Coastal458.11.3098
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8675
Triple Number Coastal/Long Distance Medium1.0956
Triple Number Coastal/Long Distance High1.2687
Triple Number Windward/Leeward Low0.6812
Triple Number Windward/Leeward Medium0.8665
Triple Number Windward/Leeward High1.0134
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8675
Triple Number Coastal/Long Distance Medium1.0956
Triple Number Coastal/Long Distance High1.2687
Triple Number Windward/Leeward Low0.6812
Triple Number Windward/Leeward Medium0.8665
Triple Number Windward/Leeward High1.0134
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Predominantly Upwind623.20.9628
Predominantly Downwind520.81.1521
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance596.91.0052
Triple Number Coastal/Long Distance Low691.60.8675
Triple Number Coastal/Long Distance Medium547.61.0956
Triple Number Coastal/Long Distance High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance955.7755.5654.4575.7523.9480.7411.4
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low691.60.8675
Triple Number All Purpose Medium547.61.0956
Triple Number All Purpose High472.91.2687
Triple Number Windward/Leeward Low880.80.6812
Triple Number Windward/Leeward Medium692.40.8665
Triple Number Windward/Leeward High592.11.0134
Predominantly Upwind623.20.9628
Predominantly Downwind520.81.1521
Predominantly Upwind Low776.30.7729
Predominantly Upwind Medium667.70.8987
Predominantly Upwind High642.60.9338
Predominantly Downwind Low742.80.8078
Predominantly Downwind Medium504.61.1890
Predominantly Downwind High369.51.6240
Chicago-Mac Upwind0.9468
Chicago-Mac All Purpose1.0293
Chicago-Mac Downwind1.1232
Bayview-Mac Cove Island0.9645
Bayview-Mac Shore0.9639
Harvest Moon Regatta428.31.4009
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy584.51.0264
San Francisco Bay Medium678.90.8837
Predominantly Reaching502.11.1949
Predominantly Reaching Low629.30.9535
Predominantly Reaching Medium496.61.2083
Predominantly Reaching High415.11.4454
Windward/Leeward 60-40 Low890.00.6742
Windward/Leeward 60-40 Medium738.10.8129
Windward/Leeward 60-40 High669.30.8965
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low946.90.6337
5-Band Low / Medium821.10.7307
5-Band Medium679.90.8825
5-Band Medium / High603.70.9938
5-Band High566.71.0588
ORC Ref  04560002OQSIssued on 20/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

MO GRINS

USA 208

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassViper 640MeasurementHINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA6.467Max. Beam2.420Draft1.399Displacement319Wetted area5.96IMS L5.977LSM05.608Acc. length6.467Sink (kg/mm) 4.94
VCGD-0.500VCGM-0.424RM Rated (kg·m) 9.0Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
PIPA0.0000
RIG
Forestay tensionFixedInner stayNone FittedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders1Rotating mastNo
P7.830IG7.048ISP7.840MDT10.060MDL10.080MDT20.055MDL20.060TL1.200MW0.080GO0.080
E2.950J2.400BAS0.796FSDNo FoilSFJSPLWPLTPS4.200BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.500Flotation Date09/03/2021MeasurerComment
SFFP0.011FFMFF0.505LCFcl3.624SG
SAFP6.467FAMFA0.105LCFsh3.780HBI0.600
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04560002OQSIssued on 20/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

MO GRINS

USA 208

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMain0.310.921.412.112.6415.3110/06/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJib0.050.350.641.151.682.206.87YesNo 7.8610/06/2023
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentspi9.727.608.665.505.6298%39.8610/06/2023
ORC Ref  04560002OQSIssued on 20/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org