Club
Certificate
2022

Boat

Blackwatch

USA71

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 Angles45.4°43.5°43.6°43.2°42.4°41.8°39.9°
Beat VMG3.934.695.205.575.836.016.25
52°6.107.187.998.438.688.839.00
60°6.487.648.428.799.009.139.28
75°6.818.018.709.059.299.469.64
90°6.818.008.799.189.469.7010.02
110°6.537.958.869.289.499.6610.04
120°6.427.828.789.279.629.8810.26
135°5.867.178.328.999.399.7510.49
150°4.986.147.258.248.879.269.92
Run VMG4.325.316.287.137.798.339.17
Gybe Angles143.9°146.9°144.8°150.5°155.9°162.8°177.2°

APH: 477.3

CDL: 12.805

GPH: 535.8

CertNo: USA71

BOAT
ClassCustomDesignerS&SBuilderNevinsAge date05/1938Series date05/1938Offset fileUS19840.OFFData fileUSA71
HULL
Length Overall20.684 mMaximum Beam4.432 mDraft2.839 mDisplacement33,138 kgDLR10.9498IMS DivisionCruiser/RacerDynamic Allowance0.343%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.610m
CREW
Maximum weight1,330 kgMinimum weight998 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail106.17108.11Headsail Luffed151.01151.01Headsail FlyingSymmetric300.25300.25Asymmetric301.31301.31 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail32.91Storm Jib28.10Heavy Weather Jib75.86
SAIL LIMITS
Headsails7  Spinnakers5 * Asymmetric may be tacked on the pole
STABILITY
Righting Moment687.4 kg·mStability IndexN/A
COMMENTS
New rig 2019
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  04560002326Issued on 20/05/2022Valid until 31/01/2023
VPP ver: 2022 1.02 | © ORC | www.orc.org

Club
Certificate
2022

Boat

Blackwatch

USA71

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 VMG915.8767.7692.8646.3617.4598.8575.8
52°590.2501.2450.4426.8414.8407.8400.2
60°555.5471.5427.6409.6400.2394.4387.9
75°528.7449.7414.0397.8387.4380.5373.6
90°528.7449.8409.7392.0380.5371.2359.4
110°551.0452.8406.5387.9379.5372.7358.7
120°560.4460.6410.0388.5374.2364.3351.0
135°614.1502.1432.5400.6383.4369.4343.1
150°722.3586.7496.3437.1405.9388.7362.8
Run VMG834.1677.5573.1504.7462.1432.4392.6
Selected Courses
Windward / Leeward874.9722.6632.9575.5539.7515.6484.2
All purpose671.8558.4495.2460.3439.3425.4406.6
Single Number Scoring Options
CourseTime On DistanceTime On Time
Windward / Leeward599.01.0017
All purpose477.31.2571
 
Custom scoring options for Australia
Single NumberTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Custom scoring options for Austria
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Brazil
Single NumberTime On Time
Upwind "bolina"0.8723
Downwind "popa"1.0835
70% up, 30% down "Ilhabela"0.9265
30% up, 70% down "Ilhabela-inverso"1.0101
Custom scoring options for Bulgaria
Single NumberTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Predominantly Upwind519.91.1541
Predominantly Downwind482.71.2429
Custom scoring options for Canada
Single NumberTime On DistanceTime On Time
Triple Number All Purpose Low615.10.9754
Triple Number All Purpose Medium474.91.2635
Triple Number All Purpose High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Predominantly Upwind519.91.1541
Predominantly Downwind482.71.2429
Predominantly Upwind Low694.00.8645
Predominantly Upwind Medium542.11.1069
Predominantly Upwind High491.11.2217
Predominantly Downwind Low666.20.9007
Predominantly Downwind Medium476.91.2582
Predominantly Downwind High401.91.4931
Chicago-Mac Upwind1.1313
Chicago-Mac All Purpose1.1729
Chicago-Mac Downwind1.2220
Bayview-Mac Cove Island1.0924
Bayview-Mac Shore1.1001
Victoria-Maui1.3027
Custom scoring options for Cyprus
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Denmark
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Spain
Single NumberTime On Distance
Coastal/Long Distance523.4
Triple Number Coastal/Long Distance Low615.1
Triple Number Coastal/Long Distance Medium474.9
Triple Number Coastal/Long Distance High421.8
Triple Number Windward/Leeward Low798.7
Triple Number Windward/Leeward Medium598.0
Triple Number Windward/Leeward High509.9
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Estonia
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Finland
Single NumberTime On DistanceTime On Time
FinRating (Coastal/Long Distance)523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for France
Single NumberTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Custom scoring options for Germany
Single NumberTime On Time
Triple Number Coastal/Long Distance Low0.9754
Triple Number Coastal/Long Distance Medium1.2635
Triple Number Coastal/Long Distance High1.4224
Triple Number Windward/Leeward Low0.7512
Triple Number Windward/Leeward Medium1.0034
Triple Number Windward/Leeward High1.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Greece
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Hungary
Single NumberTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Custom scoring options for Israel
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Italy
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Japan
Single NumberTime On DistanceTime On Time
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Korea
Single NumberTime On Distance
Triple Number Coastal/Long Distance Low615.1
Triple Number Coastal/Long Distance Medium474.9
Triple Number Coastal/Long Distance High421.8
Triple Number Windward/Leeward Low798.7
Triple Number Windward/Leeward Medium598.0
Triple Number Windward/Leeward High509.9
Predominantly Upwind519.9
Predominantly Downwind482.7
Predominantly Reaching459.9
Custom scoring options for Lithuania
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Netherlands
Single NumberTime On Time
Triple Number Coastal/Long Distance Low0.9754
Triple Number Coastal/Long Distance Medium1.2635
Triple Number Coastal/Long Distance High1.4224
Triple Number Windward/Leeward Low0.7512
Triple Number Windward/Leeward Medium1.0034
Triple Number Windward/Leeward High1.1768
Coastal/Long Distance1.1465
Predominantly Upwind1.1541
Predominantly Downwind1.2429
Custom scoring options for Norway
Single NumberTime On Time
Distanseseilas (NOR-rating ett tall)1.1465
Tretall Distanseseilas Lite vind0.9754
Tretall Distanseseilas Mellomvind1.2635
Tretall Distanseseilas Mye vind1.4224
Tretall Pølsebane Lite vind0.7512
Tretall Pølsebane Mellomvind1.0034
Tretall Pølsebane Mye vind1.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Distanseseilas870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Portugal
Single NumberTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Coastal/Long Distance523.41.1465
Custom scoring options for Russia
Single NumberTime On DistanceTime On Time
Predominantly Upwind519.91.1541
Predominantly Downwind482.71.2429
Custom scoring options for South Africa
Single NumberTime On DistanceTime On Time
Cape Doctor Inshore493.61.2155
Cape Doctor Coastal412.21.4555
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Custom scoring options for Slovenia
Single NumberTime On Time
Triple Number Coastal/Long Distance Low0.9754
Triple Number Coastal/Long Distance Medium1.2635
Triple Number Coastal/Long Distance High1.4224
Triple Number Windward/Leeward Low0.7512
Triple Number Windward/Leeward Medium1.0034
Triple Number Windward/Leeward High1.1768
Custom scoring options for Switzerland
Single NumberTime On Time
Triple Number Coastal/Long Distance Low0.9754
Triple Number Coastal/Long Distance Medium1.2635
Triple Number Coastal/Long Distance High1.4224
Triple Number Windward/Leeward Low0.7512
Triple Number Windward/Leeward Medium1.0034
Triple Number Windward/Leeward High1.1768
Custom scoring options for Sweden
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Predominantly Upwind519.91.1541
Predominantly Downwind482.71.2429
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for Ukraine
Single NumberTime On DistanceTime On Time
Coastal/Long Distance523.41.1465
Triple Number Coastal/Long Distance Low615.10.9754
Triple Number Coastal/Long Distance Medium474.91.2635
Triple Number Coastal/Long Distance High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance870.8676.5564.2494.1456.1428.7389.7
Custom scoring options for United States of America
Single NumberTime On DistanceTime On Time
Triple Number All Purpose Low615.10.9754
Triple Number All Purpose Medium474.91.2635
Triple Number All Purpose High421.81.4224
Triple Number Windward/Leeward Low798.70.7512
Triple Number Windward/Leeward Medium598.01.0034
Triple Number Windward/Leeward High509.91.1768
Predominantly Upwind519.91.1541
Predominantly Downwind482.71.2429
Predominantly Upwind Low694.00.8645
Predominantly Upwind Medium542.11.1069
Predominantly Upwind High491.11.2217
Predominantly Downwind Low666.20.9007
Predominantly Downwind Medium476.91.2582
Predominantly Downwind High401.91.4931
Chicago-Mac Upwind1.1313
Chicago-Mac All Purpose1.1729
Chicago-Mac Downwind1.2220
Bayview-Mac Cove Island1.0924
Bayview-Mac Shore1.1001
Harvest Moon Regatta415.01.4457
Victoria-Maui1.3027
5-Band
Windward/Leeward		Time On DistanceTime On Time
5-Band Low863.20.6951
5-Band Low / Medium735.00.8163
5-Band Medium586.41.0232
5-Band Medium / High519.41.1551
5-Band High489.61.2254
ORC Ref  04560002326Issued on 20/05/2022Valid until 31/01/2023
VPP ver: 2022 1.02 | © ORC | www.orc.org

Club
Certificate
2022

Boat

Blackwatch

USA71

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassCustomMeasurement06/05/2022HINPlan reviewHull constructionSolidAramid Hull CoreNoCarbon RudderNoLight stanchionsNoTrim tabNo
LOA20.684Max. Beam4.432Draft2.839Displacement33,138Wetted area72.86IMS L14.935LSM014.463Acc. length14.403Sink (kg/mm) 42.65
VCGD-0.624VCGM-0.581RM Measured (kg·m) 687.4RM Default (kg·m) 667.6Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.610PBW0.158PIPA0.0055
PSD0.037PHD0.079PHL0.116
PSA8.0°ESL0.991
ST10.027ST20.198ST30.290
ST40.070ST50.259
RIG
Forestay tensionFixedInner stayFixedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays1Spreaders2
P21.865IG23.585ISP23.845MDT10.245MDL10.382MDT20.184MDL20.251TL11.750MW0.251GO0.291
E8.600J8.005BAS1.690FSD0.012SFJ0.000SPL8.250WPLTPSBD0.211MWT933.70MCG6.801
PY9.930MDT1Y0.137MDL1Y0.162MDT2Y0.082MDL2Y0.098TLY5.593BASY1.480EY3.917BDY0.132IYEB9.710
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date06/05/2022MeasurerComment
SFFP1.423FFMFF1.683LCFcl10.909SG1.0230
SAFP18.898FAMFA1.073LCFsh11.140HBI1.373
W1249.0W2249.0W3249.0W4249.0
PD1515.9PD2515.9PD3515.9PD4515.9
WD18.085PLM9000.00GSA1.0RSA1.0
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG1Fuel Rigid Al. Cockpit CL0.900024624616.750.15Total deductible22116.750.15
Total deductible
ORC Ref  04560002326Issued on 20/05/2022Valid until 31/01/2023
VPP ver: 2022 1.02 | © ORC | www.orc.org

Club
Certificate
2022

Boat

Blackwatch

USA71

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateMakerMaterialComment853060.191.632.965.146.90106.1720/05/2019DoyleUnknown
MIZZEN
IdMHBMUWMTWMHWMQWAreaMeas.DateMakerMaterialComment813550.070.801.482.483.2122.7817/05/2016DoyleUnknown
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateMakerMaterialCommentLT#10.081.603.176.349.5412.6823.77NoNo 151.0117/05/2016DoyleUnknown
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateMakerMaterialCommentSym24.0224.0224.0215.2014.20300.2517/11/2009NorthUnknown
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateMakerMaterialCommentA225.5322.9924.2615.2313.60112%301.3115/07/2020Unknown
MIZZEN STAYSAIL
IdYSHFYSHWYSFLAreaMeas.DateMakerMaterialComment813536.689.6911.0650.8317/05/2019DoyleUnknown
ORC Ref  04560002326Issued on 20/05/2022Valid until 31/01/2023
VPP ver: 2022 1.02 | © ORC | www.orc.org