Club Certificate2026
INVISIBLE HANDUSA 28
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 Angles44.5°41.7°39.3°37.8°37.1°37.2°37.0°37.6°39.3°
Beat VMG2.813.954.674.975.135.225.295.295.16
52°4.375.936.767.067.227.337.427.497.43
60°4.676.216.987.297.487.627.747.867.83
75°4.886.417.147.617.918.128.308.518.61
90°4.746.317.117.678.208.588.879.319.61
110°4.756.537.417.948.408.839.2410.2411.14
120°4.586.457.458.218.779.319.8410.9111.98
135°4.095.807.087.948.869.8810.8412.4714.21
150°3.384.876.097.037.888.719.7812.8716.44
Run VMG2.934.225.286.096.837.548.4711.1414.31
Gybe Angles139.4°142.3°146.5°150.3°151.0°147.6°145.4°147.0°151.2°
APH ToD:511.3CDL: 9.086APH ToT: 1.1734CertNo:US28-30
BOAT
ClassC&C 30DesignerMARK MILLSBuilderUS WATERCRAFTAge date01/2014Series date01/2014Offset fileC&C30.offData fileUS28-30
HULL
Length Overall9.147 mMaximum Beam2.980 mDraft2.311 mDisplacement2,020 kgDLR3.0124IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.390%RS Assessment-0.229%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight569 kg(default)Minimum weight439 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail36.5937.57Headsail Luffed23.3423.34Headsail FlyingSymmetricAsymmetric119.12119.12 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS Maximum (m²)
Trysail9.50Storm Jib7.82Heavy Weather Jib21.10
SAIL LIMITS
Headsails5Spinnakers4
STABILITY
Righting Moment 54.0 kg·m Stability Index 113.3
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  04560004UCM Issued on 29/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
INVISIBLE HANDUSA 28
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 VMG1279.3911.0770.3723.8701.6689.1680.4680.5698.2
52°824.2607.4532.5510.3498.8491.1485.4480.6484.5
60°771.5579.7515.9493.7481.3472.2465.3458.1459.8
75°737.4561.5504.6473.1455.3443.1433.6422.9418.3
90°760.0570.8506.3469.1438.9419.5405.8386.8374.5
110°758.3551.1486.1453.6428.4407.5389.5351.5323.1
120°786.5558.0483.2438.3410.4386.7365.9330.1300.6
135°880.7620.7508.7453.4406.2364.3332.3288.6253.3
150°1064.0739.6590.9511.9456.9413.5368.1279.8218.9
Run VMG1228.6854.1682.3591.0527.2477.5425.1323.1251.5
Selected Courses
Windward / Leeward1253.9882.6726.3657.4614.4583.3552.7501.8474.9
All purpose954.5684.5579.7532.3501.0477.5456.9424.2406.0
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward629.60.9530
All purpose511.31.1734
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.8145
Downwind "popa"1.0824
70% up, 30% down "Ilhabela"0.8798
30% up, 70% down "Ilhabela-inverso"0.9852
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Predominantly Upwind563.01.0658
Predominantly Downwind500.91.1978
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP525.31.1421 Predom. Rc High396.41.5138 5B SF Bay L/M675.90.8877 TriNum AP Low632.10.9492 Predom. Dn Low751.60.7983 5B SF Bay Med598.31.0029 TriNum AP Med512.11.1715 Predom. Dn L/M569.01.0544 5B SF Bay M/H539.81.1114 TriNum AP High449.81.3339 Predom. Dn Med488.31.2287 5B SF Bay High499.71.2007 TriNum W/L Low842.50.7122 Predom. Dn M/H419.91.4288 5B AP Low694.50.8640 TriNum W/L Med630.30.9520 Predom. Dn High369.61.6234 5B AP L/M566.81.0586 TriNum W/L Hig541.31.1085 ChiMac Up Low685.00.8759 5B AP Med505.11.1878 Predom. Upwind582.41.0302 ChiMac Up Med628.60.9544 5B AP M/H458.61.3084 Predom. Reaching499.21.2020 ChiMac Up High560.11.0712 5B AP High426.71.4061 Predom. Downwind519.01.1562 ChiMac Off Low654.30.9170 5B W/L Low936.40.6408 Predom. Up Low763.30.7860 ChiMac Off Med579.61.0351 5B W/L L/M708.50.8469 Predom. Up L/M605.10.9915 ChiMac Off High485.61.2357 5B W/L Med620.50.9669 Predom. Up Med550.91.0891 ChiMac AP Low667.40.8990 5B W/L M/H554.51.0820 Predom. Up M/H516.51.1617 ChiMac AP Med602.50.9958 5B W/L High505.91.1859 Predom. Up High499.01.2024 ChiMac AP High521.91.1496 W/L 60-40 Low942.70.6365 Predom. Rc Low678.40.8844 BayMac Cove Island760.40.7890 W/L 60-40 L/M719.70.8337 Predom. Rc L/M533.51.1247 BayMac Shore755.30.7944 W/L 60-40 Med637.90.9407 Predom. Rc Med472.71.2693 Harvest Moon435.21.3787 W/L 60-40 M/H580.41.0338 Predom. Rc M/H425.51.4102 5B SF Bay Low793.30.7563 W/L 60-40 High541.51.1081      SA/DSPL Up37.42SA/DSPL Dn97.21
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance554.6
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating554.61.0819
FinRating, kevyt tuuli921.71.0849
FinRating, kova tuuli427.21.1704
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.0819
Triple Number Coastal/Long Distance Low0.9492
Triple Number Coastal/Long Distance Medium1.1716
Triple Number Coastal/Long Distance High1.3339
Triple Number Windward/Leeward Low0.7459
Triple Number Windward/Leeward Medium0.9520
Triple Number Windward/Leeward High1.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
For information
General Purpose Handicap (GPH)568.5
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Saronikos S All Purpose567.11.0580
Saronikos S Upwind661.20.9074
Saronikos S Downwind450.61.3316
Saronikos N All Purpose606.30.9896
Saronikos N Upwind685.40.8754
Saronikos N Downwind514.31.1667
Saronikos SW All Purpose566.11.0598
Saronikos SW Upwind668.40.8977
Saronikos SW Downwind466.71.2856
Saronikos NE All Purpose623.60.9621
Saronikos NE Upwind643.10.9330
Saronikos NE Downwind576.91.0400
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose525.31.1421
5-Band All Purpose Low755.00.7947
5-Band All Purpose L/M586.21.0235
5-Band All Purpose Med519.01.1560
5-Band All Purpose M/H468.01.2821
5-Band All Purpose High434.41.3812
Single Number Predominant Upwind561.11.0693
Single Number Predominant Reaching483.61.2406
Single Number Predominant Downwind502.41.1944
5-Band 50-50 Windward/Leeward Low936.40.6408
5-Band 50-50 Windward/Leeward L/M708.50.8469
5-Band 50-50 Windward/Leeward Med620.50.9669
5-Band 50-50 Windward/Leeward M/H554.51.0820
5-Band 50-50 Windward/Leeward High505.91.1859
5-Band 60-40 Windward/Leeward Low942.70.6365
5-Band 60-40 Windward/Leeward L/M719.70.8337
5-Band 60-40 Windward/Leeward Med637.90.9407
5-Band 60-40 Windward/Leeward M/H580.41.0338
5-Band 60-40 Windward/Leeward High541.51.1081
Triple Number 50-50 Windward/Leeward Low842.50.7122
Triple Number 50-50 Windward/Leeward Med630.30.9519
Triple Number 50-50 Windward/Leeward High541.31.1085
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward647.20.9271
Triple Number 60-40 Windward/Leeward Low850.00.7059
Triple Number 60-40 Windward/Leeward Med646.60.9280
Triple Number 60-40 Windward/Leeward High569.51.0535
Triple Number All-Purpose Low685.20.8757
Triple Number All-Purpose Med526.81.1390
Triple Number All-Purpose High458.71.3080
Triple Number Predominant Upwind Low702.30.8544
Triple Number Predominant Upwind Med558.71.0739
Triple Number Predominant Upwind High521.51.1506
Triple Number Predominant Reaching Low622.70.9636
Triple Number Predominant Reaching Med489.81.2250
Triple Number Predominant Reaching High409.01.4669
Triple Number Predominant Downwind Low676.90.8864
Triple Number Predominant Downwind Med497.61.2058
Triple Number Predominant Downwind High392.51.5285
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low632.1
Triple Number Coastal/Long Distance Medium512.1
Triple Number Coastal/Long Distance High449.8
Triple Number Windward/Leeward Low804.4
Triple Number Windward/Leeward Medium630.3
Triple Number Windward/Leeward High541.3
Predominantly Upwind563.0
Predominantly Downwind500.9
Predominantly Reaching485.7
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.9492
Triple Number Coastal/Long Distance Medium1.1716
Triple Number Coastal/Long Distance High1.3339
Triple Number Windward/Leeward Low0.7459
Triple Number Windward/Leeward Medium0.9520
Triple Number Windward/Leeward High1.1085
Coastal/Long Distance1.0819
Predominantly Upwind1.0658
Predominantly Downwind1.1978
For information
General Purpose Handicap (GPH)568.5
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.1734
Distanseseilas Trippeltall svak vind0.9492
Distanseseilas Trippeltall mellomvind1.1716
Distanseseilas Trippeltall sterk vind1.3339
Pølsebane Trippeltall svak vind0.7459
Pølsebane Trippeltall mellomvind0.9520
Pølsebane Trippeltall sterk vind1.1085
Motvind Singeltall1.0658
Medvind Singeltall1.1978
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Coastal/Long Distance554.61.0819
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind563.01.0658
Predominantly Downwind500.91.1978
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore482.91.2424
Cape Doctor Coastal411.51.4583
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.9492
Triple Number Coastal/Long Distance Medium1.1716
Triple Number Coastal/Long Distance High1.3339
Triple Number Windward/Leeward Low0.7459
Triple Number Windward/Leeward Medium0.9520
Triple Number Windward/Leeward High1.1085
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.9492
Triple Number Coastal/Long Distance Medium1.1716
Triple Number Coastal/Long Distance High1.3339
Triple Number Windward/Leeward Low0.7459
Triple Number Windward/Leeward Medium0.9520
Triple Number Windward/Leeward High1.1085
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Predominantly Upwind563.01.0658
Predominantly Downwind500.91.1978
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance554.61.0819
Triple Number Coastal/Long Distance Low632.10.9492
Triple Number Coastal/Long Distance Medium512.11.1716
Triple Number Coastal/Long Distance High449.81.3339
Triple Number Windward/Leeward Low804.40.7459
Triple Number Windward/Leeward Medium630.30.9520
Triple Number Windward/Leeward High541.31.1085
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1251.4879.7685.9595.4535.7496.7460.9402.7381.9
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP525.31.1421 Predom. Dn High369.61.6234 5B AP M/H458.61.3084 TriNum AP Low632.10.9492 Predom. Rc Low678.40.8844 5B AP High426.71.4061 TriNum AP Med512.11.1715 Predom. Rc L/M533.51.1247 5B SF Bay Low793.30.7563 TriNum AP High449.81.3339 Predom. Rc Med472.71.2693 5B SF Bay L/M675.90.8877 TriNum W/L Low842.50.7122 Predom. Rc M/H425.51.4102 5B SF Bay Med598.31.0029 TriNum W/L Med630.30.9520 Predom. Rc High396.41.5138 5B SF Bay M/H539.81.1114 TriNum W/L Hig541.31.1085 5B W/L Low936.40.6408 5B SF Bay High499.71.2007 Predom. Upwind582.41.0302 5B W/L L/M708.50.8469 ChiMac Up Low685.00.8759 Predom. Reaching499.21.2020 5B W/L Med620.50.9669 ChiMac Up Med628.60.9544 Predom. Downwind519.01.1562 5B W/L M/H554.51.0820 ChiMac Up High560.11.0712 Predom. Up Low763.30.7860 5B W/L High505.91.1859 ChiMac Off Low654.30.9170 Predom. Up L/M605.10.9915 W/L 60-40 Low942.70.6365 ChiMac Off Med579.61.0351 Predom. Up Med550.91.0891 W/L 60-40 L/M719.70.8337 ChiMac Off High485.61.2357 Predom. Up M/H516.51.1617 W/L 60-40 Med637.90.9407 ChiMac AP Low667.40.8990 Predom. Up High499.01.2024 W/L 60-40 M/H580.41.0338 ChiMac AP Med602.50.9958 Predom. Dn Low751.60.7983 W/L 60-40 High541.51.1081 ChiMac AP High521.91.1496 Predom. Dn L/M569.01.0544 5B AP Low694.50.8640 BayMac Cove Island760.40.7890 Predom. Dn Med488.31.2287 5B AP L/M566.81.0586 BayMac Shore755.30.7944 Predom. Dn M/H419.91.4288 5B AP Med505.11.1878 Harvest Moon435.21.3787      SA/DSPL Up37.42SA/DSPL Dn97.21
ORC Ref  04560004UCM Issued on 29/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
INVISIBLE HANDUSA 28
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassC&C 30MeasurementHINUSWC3028D617Plan reviewHull constructionCoredCarbon rudderYesLight stanchionsNoTrim tabNo
Length overall9.147Maximum beam2.980Draft2.311Displacement2,020Wetted area16.94IMS L9.111LSM08.752Accomod. length9.147Sink (kg/mm) 13.07
VCGD-0.147VCGM-0.145 RM Rated (kg·m) 54.0Limit of positive stability(°) 119.7 Stability Index 113.3 BLR index 0.0000Default crew weight569 Declared crew weight 0
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBW0.265PIPA0.0032
EDL1.300ST10.042ST20.180
ST30.180ST40.112ST50.250
RIG
BackstayNot installedForestayFixedInner forestayNot installedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastAdjustableRunning backstaysYesCheckstaysNoSpreaders2Rotating mastNo
P12.748IG12.500ISP14.243MDT10.096MDL10.145MDT20.066MDL20.106TL1.000MW0.140GO0.140
E4.255J3.411BAS1.300FSD0.026SFJ0.160SPLWPLTPS5.640BD0.134MWT0.00MCG0.000
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered54.0Flotation Date27/09/2018
SFFP0.500FFMFF1.044LCFcl4.954SG
SAFP9.116FAMFA0.795LCFsh5.142HBI0.985
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04560004UCM Issued on 29/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
INVISIBLE HANDUSA 28
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMn1.081.532.133.033.6936.5901/05/2026119336
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJ1.50.070.601.071.952.703.4112.60YesNo 23.34
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA216.0514.0715.069.469.6298%119.12119340A116.0013.8014.908.769.4493%110.4609/05/2020
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverYes (manual)BoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
ORC Ref  04560004UCM Issued on 29/06/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org