International Certificate2026
VARUNAUSA 4777
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
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 Angles45.8°42.1°40.4°38.2°37.1°36.6°36.0°35.6°36.3°
Beat VMG3.785.166.126.576.816.967.087.257.23
52°5.947.838.959.379.659.8710.0310.3310.41
60°6.458.329.309.7910.1010.3510.5310.9011.04
75°6.948.749.6710.3110.7111.0411.3311.8212.12
90°6.908.689.6310.5611.3011.8112.2713.0613.71
110°6.047.999.2410.3111.3012.0413.1214.5715.85
120°5.397.639.1410.3211.3412.4013.4115.0716.74
135°4.776.938.619.6810.8712.3513.8116.2719.14
150°3.975.807.348.539.4810.4611.7915.1919.44
Run VMG3.445.026.367.398.229.0610.2113.1516.83
Gybe Angles139.9°141.0°142.6°148.0°151.7°147.1°142.1°143.1°148.1°
APH ToD:393.6CDL: 15.165APH ToT: 1.5245CertNo:US4777
BOAT
ClassCookson 50 cantDesignerFarrBuilderCooksonAge date10/2004Series date01/2004Offset fileCOOKSON50-USA4777.offData fileUSA 4777
HULL
Length Overall15.214 mMaximum Beam4.274 mDraft3.486 mDisplacement7,401 kgDLR2.6530IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.650%RS Assessment-0.229%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.457m
CREW
Maximum weight875 kg(declared)Minimum weight744 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail92.1794.14Headsail Luffed69.1869.18Headsail Flying65.3598.07SymmetricAsymmetric263.26263.26 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS Maximum (m²)
Trysail25.41Storm Jib21.17Heavy Weather Jib57.15
SAIL LIMITS
Headsails8Spinnakers6
STABILITY
Righting Moment 316.0 kg·m Stability Index 115.8
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  04560004T3W Issued on 12/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
International Certificate2026
VARUNAUSA 4777
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
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 VMG951.8697.6587.9547.9528.4517.2508.2496.7498.0
52°605.8460.1402.2384.2373.0364.8358.9348.4345.9
60°558.5432.9387.1367.9356.3347.9341.8330.3326.0
75°518.8411.8372.4349.2336.0326.2317.9304.7297.0
90°521.4414.7373.7340.8318.7304.9293.5275.6262.7
110°595.7450.7389.5349.2318.6298.9274.3247.1227.1
120°667.4471.9393.8348.9317.5290.2268.5238.9215.0
135°754.3519.7418.1372.1331.2291.6260.7221.3188.1
150°906.0620.8490.1421.9379.9344.1305.4237.0185.2
Run VMG1046.2716.8566.0487.2438.2397.3352.7273.7213.9
Selected Courses
Windward / Leeward999.0707.2576.9517.6483.3457.3430.5385.2355.9
All purpose744.0540.8453.9411.9385.2364.7345.3315.2295.5
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward495.31.2114
All purpose393.61.5245
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"1.0814
Downwind "popa"1.2996
70% up, 30% down "Ilhabela"1.1387
30% up, 70% down "Ilhabela-inverso"1.2254
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Predominantly Upwind428.41.4005
Predominantly Downwind397.51.5093
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP404.81.4823 Predom. Rc High292.42.0523 5B SF Bay L/M533.11.1254 TriNum AP Low497.41.2063 Predom. Dn Low608.10.9868 5B SF Bay Med467.71.2830 TriNum AP Med394.71.5201 Predom. Dn L/M455.21.3182 5B SF Bay M/H416.61.4402 TriNum AP High338.81.7708 Predom. Dn Med387.11.5499 5B SF Bay High378.81.5838 TriNum W/L Low671.80.8931 Predom. Dn M/H328.01.8294 5B AP Low547.51.0958 TriNum W/L Med496.01.2097 Predom. Dn High284.12.1119 5B AP L/M441.81.3582 TriNum W/L Hig420.21.4279 ChiMac Up Low523.91.1452 5B AP Med388.61.5441 Predom. Upwind441.41.3594 ChiMac Up Med478.61.2536 5B AP M/H346.91.7298 Predom. Reaching381.01.5748 ChiMac Up High423.51.4167 5B AP High317.01.8928 Predom. Downwind412.21.4557 ChiMac Off Low526.11.1404 5B W/L Low747.60.8026 Predom. Up Low585.11.0255 ChiMac Off Med463.21.2954 5B W/L L/M561.41.0688 Predom. Up L/M463.81.2937 ChiMac Off High384.01.5626 5B W/L Med488.01.2295 Predom. Up Med418.41.4340 ChiMac AP Low521.41.1507 5B W/L M/H431.81.3894 Predom. Up M/H386.91.5508 ChiMac AP Med468.21.2816 5B W/L High388.01.5465 Predom. Up High366.71.6363 ChiMac AP High402.01.4925 W/L 60-40 Low744.80.8056 Predom. Rc Low525.01.1428 BayMac Cove Island598.01.0033 W/L 60-40 L/M565.31.0613 Predom. Rc L/M411.81.4571 BayMac Shore591.91.0137 W/L 60-40 Med497.01.2072 Predom. Rc Med361.31.6608 Harvest Moon331.91.8080 W/L 60-40 M/H447.41.3412 Predom. Rc M/H319.91.8753 5B SF Bay Low631.40.9503 W/L 60-40 High410.21.4628      SA/DSPL Up42.20SA/DSPL Dn92.97
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance430.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating430.21.3946
FinRating, kevyt tuuli734.01.3625
FinRating, kova tuuli317.41.5753
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.3946
Triple Number Coastal/Long Distance Low1.2063
Triple Number Coastal/Long Distance Medium1.5202
Triple Number Coastal/Long Distance High1.7708
Triple Number Windward/Leeward Low0.9345
Triple Number Windward/Leeward Medium1.2097
Triple Number Windward/Leeward High1.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
For information
General Purpose Handicap (GPH)440.0
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Saronikos S All Purpose437.81.3704
Saronikos S Upwind495.61.2107
Saronikos S Downwind368.21.6296
Saronikos N All Purpose465.01.2904
Saronikos N Upwind509.71.1772
Saronikos N Downwind418.21.4347
Saronikos SW All Purpose435.01.3792
Saronikos SW Upwind499.81.2006
Saronikos SW Downwind375.71.5969
Saronikos NE All Purpose479.21.2520
Saronikos NE Upwind472.91.2687
Saronikos NE Downwind470.11.2762
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose404.81.4823
5-Band All Purpose Low592.31.0131
5-Band All Purpose L/M457.41.3119
5-Band All Purpose Med401.21.4955
5-Band All Purpose M/H356.51.6828
5-Band All Purpose High324.91.8467
Single Number Predominant Upwind426.91.4054
Single Number Predominant Reaching370.41.6199
Single Number Predominant Downwind398.81.5044
5-Band 50-50 Windward/Leeward Low747.60.8026
5-Band 50-50 Windward/Leeward L/M561.41.0688
5-Band 50-50 Windward/Leeward Med488.01.2295
5-Band 50-50 Windward/Leeward M/H431.81.3894
5-Band 50-50 Windward/Leeward High388.01.5465
5-Band 60-40 Windward/Leeward Low744.80.8056
5-Band 60-40 Windward/Leeward L/M565.31.0613
5-Band 60-40 Windward/Leeward Med497.01.2072
5-Band 60-40 Windward/Leeward M/H447.41.3412
5-Band 60-40 Windward/Leeward High410.21.4628
Triple Number 50-50 Windward/Leeward Low671.80.8931
Triple Number 50-50 Windward/Leeward Med496.11.2096
Triple Number 50-50 Windward/Leeward High420.21.4279
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward504.41.1895
Triple Number 60-40 Windward/Leeward Low671.40.8937
Triple Number 60-40 Windward/Leeward Med504.31.1899
Triple Number 60-40 Windward/Leeward High437.41.3718
Triple Number All-Purpose Low537.41.1165
Triple Number All-Purpose Med407.71.4715
Triple Number All-Purpose High348.01.7241
Triple Number Predominant Upwind Low539.81.1116
Triple Number Predominant Upwind Med425.21.4113
Triple Number Predominant Upwind High387.01.5504
Triple Number Predominant Reaching Low482.41.2437
Triple Number Predominant Reaching Med375.21.5992
Triple Number Predominant Reaching High305.11.9663
Triple Number Predominant Downwind Low545.01.1010
Triple Number Predominant Downwind Med396.31.5140
Triple Number Predominant Downwind High307.81.9495
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low497.4
Triple Number Coastal/Long Distance Medium394.7
Triple Number Coastal/Long Distance High338.8
Triple Number Windward/Leeward Low642.1
Triple Number Windward/Leeward Medium496.0
Triple Number Windward/Leeward High420.2
Predominantly Upwind428.4
Predominantly Downwind397.5
Predominantly Reaching376.7
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.2063
Triple Number Coastal/Long Distance Medium1.5202
Triple Number Coastal/Long Distance High1.7708
Triple Number Windward/Leeward Low0.9345
Triple Number Windward/Leeward Medium1.2097
Triple Number Windward/Leeward High1.4279
Coastal/Long Distance1.3946
Predominantly Upwind1.4005
Predominantly Downwind1.5093
For information
General Purpose Handicap (GPH)440.0
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.5245
Distanseseilas Trippeltall svak vind1.2063
Distanseseilas Trippeltall mellomvind1.5202
Distanseseilas Trippeltall sterk vind1.7708
Pølsebane Trippeltall svak vind0.9345
Pølsebane Trippeltall mellomvind1.2097
Pølsebane Trippeltall sterk vind1.4279
Motvind Singeltall1.4005
Medvind Singeltall1.5093
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Coastal/Long Distance430.21.3946
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind428.41.4005
Predominantly Downwind397.51.5093
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore364.71.6451
Cape Doctor Coastal301.41.9908
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.2063
Triple Number Coastal/Long Distance Medium1.5202
Triple Number Coastal/Long Distance High1.7708
Triple Number Windward/Leeward Low0.9345
Triple Number Windward/Leeward Medium1.2097
Triple Number Windward/Leeward High1.4279
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.2063
Triple Number Coastal/Long Distance Medium1.5202
Triple Number Coastal/Long Distance High1.7708
Triple Number Windward/Leeward Low0.9345
Triple Number Windward/Leeward Medium1.2097
Triple Number Windward/Leeward High1.4279
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Predominantly Upwind428.41.4005
Predominantly Downwind397.51.5093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance430.21.3946
Triple Number Coastal/Long Distance Low497.41.2063
Triple Number Coastal/Long Distance Medium394.71.5202
Triple Number Coastal/Long Distance High338.81.7708
Triple Number Windward/Leeward Low642.10.9345
Triple Number Windward/Leeward Medium496.01.2097
Triple Number Windward/Leeward High420.21.4279
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1003.7708.2543.8465.2414.2380.3348.8298.2277.5
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP404.81.4823 Predom. Dn High284.12.1119 5B AP M/H346.91.7298 TriNum AP Low497.41.2063 Predom. Rc Low525.01.1428 5B AP High317.01.8928 TriNum AP Med394.71.5201 Predom. Rc L/M411.81.4571 5B SF Bay Low631.40.9503 TriNum AP High338.81.7708 Predom. Rc Med361.31.6608 5B SF Bay L/M533.11.1254 TriNum W/L Low671.80.8931 Predom. Rc M/H319.91.8753 5B SF Bay Med467.71.2830 TriNum W/L Med496.01.2097 Predom. Rc High292.42.0523 5B SF Bay M/H416.61.4402 TriNum W/L Hig420.21.4279 5B W/L Low747.60.8026 5B SF Bay High378.81.5838 Predom. Upwind441.41.3594 5B W/L L/M561.41.0688 ChiMac Up Low523.91.1452 Predom. Reaching381.01.5748 5B W/L Med488.01.2295 ChiMac Up Med478.61.2536 Predom. Downwind412.21.4557 5B W/L M/H431.81.3894 ChiMac Up High423.51.4167 Predom. Up Low585.11.0255 5B W/L High388.01.5465 ChiMac Off Low526.11.1404 Predom. Up L/M463.81.2937 W/L 60-40 Low744.80.8056 ChiMac Off Med463.21.2954 Predom. Up Med418.41.4340 W/L 60-40 L/M565.31.0613 ChiMac Off High384.01.5626 Predom. Up M/H386.91.5508 W/L 60-40 Med497.01.2072 ChiMac AP Low521.41.1507 Predom. Up High366.71.6363 W/L 60-40 M/H447.41.3412 ChiMac AP Med468.21.2816 Predom. Dn Low608.10.9868 W/L 60-40 High410.21.4628 ChiMac AP High402.01.4925 Predom. Dn L/M455.21.3182 5B AP Low547.51.0958 BayMac Cove Island598.01.0033 Predom. Dn Med387.11.5499 5B AP L/M441.81.3582 BayMac Shore591.91.0137 Predom. Dn M/H328.01.8294 5B AP Med388.61.5441 Harvest Moon331.91.8080      SA/DSPL Up42.20SA/DSPL Dn92.97
ORC Ref  04560004T3W Issued on 12/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
International Certificate2026
VARUNAUSA 4777
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassCookson 50 cantMeasurement29/03/2023HINPlan reviewHull constructionCarbonCarbon rudderYesLight stanchionsNoTrim tabNo
Length overall15.214Maximum beam4.274Draft3.486Displacement7,401Wetted area38.63IMS L14.355LSM014.076Accomod. length13.890Sink (kg/mm) 30.74
VCGD-0.480VCGM-0.495 RM Rated (kg·m) 316.0Limit of positive stability(°) 116.3 Stability Index 115.8 BLR index 1.0484Default crew weight1,121 Declared crew weight 875
Centerboard weightList angle17.5Canting keel angle38.0
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.457PBW0.115PIPA0.0039
EDL2.240ST10.048ST20.180
ST30.180ST40.112ST50.280
RIG
BackstayAdjustableForestayFixedInner forestayNot installedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingYesBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders2Rotating mastNo
P20.800IG20.575ISP22.755MDT10.140MDL10.287MDT20.140MDL20.220TL1.930MW0.287GO0.287
E6.980J6.130BAS1.975FSD0.050SFJ0.000SPLWPLTPS8.620BD0.300MWT266.00MCG7.630
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS122.7558.620
FLOTATION AND STABILITY
Calculation methodBoom incliningFlotation Date24/05/2023MeasurerFIV-164
SFFP0.932FFM1.569FF1.570LCFcl8.368SG1.0200
SAFP15.048FAM1.183FA1.186LCFsh8.623HBI1.364
W1147.0W2147.0W3147.0W4147.0LCFD8.970
PD1258.5PD2257.1PD3257.6PD4255.4
WD6.960PLM9000.00GSA1.0RSA1.0RM313.3
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCGAneoprene stbdWater240011.20BpvcFuel1302011.20Total deductible1711.20
OTHER ITEMSIdKindDescriptionWeightLCGVCGCMiscellaneouswatermaker6.02ABattery50 Ah7.62BBattery230 Ah7.15DEngine (IC)Yanmar 54 hpTotal deductible
ORC Ref  04560004T3W Issued on 12/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
International Certificate2026
VARUNAUSA 4777
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMO-261.532.233.134.595.8092.1720/05/2026
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJ10.141.081.963.494.936.4320.35YesNo 69.1803/04/2025OTI 107862-001J20.141.031.853.354.856.4120.32YesNo 67.5103/10/2025OTI 107862-002A0.131.001.873.374.776.1720.32YesNo 66.4413/05/2019Jib top0.100.831.583.184.906.6720.00YesYes065.3503/04/2025OTI 107862-004SS0.090.831.603.104.515.9919.30NoInner 58.9421/01/2017GS0.110.551.142.243.364.8214.57NoInner 33.5621/07/2017
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA2.5-2625.2821.7323.5113.4013.6099%263.2620/05/2026A2 (E)25.0521.0523.0512.9012.80101%247.4019/03/2018A2 (A)25.0621.0723.0712.8712.77101%246.9923/07/2019A2A0 (F)23.2120.9922.108.1610.7076%159.6429/03/2023A0
NON MANUAL POWER CONTROLS (NMP)
SheetsYesMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
ORC Ref  04560004T3W Issued on 12/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org