Non Spin/HSFClub Certificate2026
BILLY P9950
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 Angles49.7°48.0°47.1°46.5°45.6°44.8°44.1°44.1°45.5°
Beat VMG1.612.423.023.483.834.104.314.434.33
52°2.603.854.785.445.926.296.546.736.70
60°2.854.145.065.746.246.596.847.077.11
75°3.034.355.296.006.526.877.127.467.63
90°2.954.265.235.966.556.967.257.738.07
110°2.653.934.955.766.416.877.207.778.33
120°2.473.704.725.536.206.717.087.658.22
135°2.143.254.235.065.766.356.797.397.92
150°1.782.713.614.405.105.706.237.027.56
Run VMG1.632.473.304.084.785.415.986.857.42
Gybe Angles171.4°172.1°172.1°173.5°174.4°175.5°175.9°177.5°178.2°
APH ToD:710.5CDL: 7.250APH ToT: 0.8444CertNo:US9950
BOAT
ClassMarlow-Hunter 31DesignerGlenn HendersonBuilderMarlow-HunterAge dateSeries date01/2015Offset filemarlowhunter31-CL.offData fileUS9950
HULL
Length Overall9.859 mMaximum Beam3.610 mDraft1.357 mDisplacement5,426 kgDLR5.9803IMS DivisionCruiser/RacerDynamic Allowance0.430%Age Allowance0.357%RS Assessment0.000%
PROPELLER
InstallationStrutTypeSolid 2 bladesDiameter0.381m
CREW
Maximum weight657 kgMinimum weight527 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail27.6527.61Headsail Luffed22.0822.08Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS Maximum (m²)
Trysail9.73Storm Jib5.95Heavy Weather Jib16.04
SAIL LIMITS
Headsails1
✱ One set on the forestay
✱ Zero set flying
Spinnakers0
✱ No spinnaker pole aboard
STABILITY
Righting Moment 131.1 kg·m Stability Index 73.9
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  04560004V9C Issued on 15/07/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2026
BILLY P9950
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 VMG2231.81490.01190.41033.4940.5877.7835.7813.2832.1
52°1385.0934.9753.8661.9607.8572.3550.5534.6537.2
60°1263.5869.8711.7627.1576.8545.9526.5508.9506.5
75°1187.7828.5681.1600.3552.0524.1505.9482.4471.7
90°1221.2844.7689.0604.0549.7517.1496.2465.6446.0
110°1357.2915.2726.9624.9561.8523.9499.8463.1432.1
120°1456.8972.2763.5650.7580.4536.2508.7470.6437.8
135°1678.61107.4850.7711.1625.1567.3530.0487.1454.6
150°2018.11327.1996.9817.4706.4631.7577.8512.7476.4
Run VMG2212.41458.81089.8883.1753.0665.3602.4525.2485.2
Selected Courses
Windward / Leeward2222.11474.41140.1958.2846.7771.5719.1669.2658.6
All purpose1681.31126.2885.5755.7676.4624.6589.8553.7539.8
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward893.10.6718
All purpose710.50.8444
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.5849
Downwind "popa"0.7026
70% up, 30% down "Ilhabela"0.6158
30% up, 70% down "Ilhabela-inverso"0.6626
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Predominantly Upwind767.20.7820
Predominantly Downwind731.70.8200
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP735.40.8158 Predom. Rc High519.51.1549 5B SF Bay L/M1035.60.5794 TriNum AP Low1005.80.5965 Predom. Dn Low1274.10.4709 5B SF Bay Med840.60.7138 TriNum AP Med707.50.8481 Predom. Dn L/M871.50.6885 5B SF Bay M/H715.80.8382 TriNum AP High585.01.0257 Predom. Dn Med694.60.8638 5B SF Bay High667.40.8991 TriNum W/L Low1380.60.4346 Predom. Dn M/H582.61.0299 5B AP Low1149.10.5222 TriNum W/L Med889.50.6745 Predom. Dn High531.31.1294 5B AP L/M844.30.7106 TriNum W/L Hig713.40.8410 ChiMac Up Low1054.10.5692 5B AP Med691.10.8681 Predom. Upwind808.70.7419 ChiMac Up Med916.80.6544 5B AP M/H596.91.0052 Predom. Reaching709.40.8458 ChiMac Up High757.10.7925 5B AP High557.61.0761 Predom. Downwind776.70.7725 ChiMac Off Low1052.80.5699 5B W/L Low1577.80.3803 Predom. Up Low1242.70.4828 ChiMac Off Med894.80.6705 5B W/L L/M1081.90.5546 Predom. Up L/M882.10.6802 ChiMac Off High710.70.8442 5B W/L Med866.50.6925 Predom. Up Med733.10.8184 ChiMac AP Low1045.30.5740 5B W/L M/H730.30.8216 Predom. Up M/H643.50.9325 ChiMac AP Med899.80.6668 5B W/L High676.00.8876 Predom. Up High611.80.9807 ChiMac AP High729.80.8222 W/L 60-40 Low1582.30.3792 Predom. Rc Low1106.90.5421 BayMac Cove Island1230.00.4878 W/L 60-40 L/M1094.00.5484 Predom. Rc L/M780.90.7684 BayMac Shore1217.80.4927 W/L 60-40 Med884.70.6782 Predom. Rc Med642.20.9342 Harvest Moon599.51.0009 W/L 60-40 M/H753.80.7959 Predom. Rc M/H557.01.0772 5B SF Bay Low1310.60.4578 W/L 60-40 High704.90.8512      SA/DSPL Up16.01SA/DSPL Dn16.01
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance781.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating781.20.7680
FinRating, kevyt tuuli1563.50.6396
FinRating, kova tuuli561.30.8907
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.7680
Triple Number Coastal/Long Distance Low0.5965
Triple Number Coastal/Long Distance Medium0.8482
Triple Number Coastal/Long Distance High1.0257
Triple Number Windward/Leeward Low0.4590
Triple Number Windward/Leeward Medium0.6745
Triple Number Windward/Leeward High0.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
For information
General Purpose Handicap (GPH)815.2
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Saronikos S All Purpose834.80.7187
Saronikos S Upwind949.10.6322
Saronikos S Downwind715.20.8390
Saronikos N All Purpose889.80.6743
Saronikos N Upwind995.20.6029
Saronikos N Downwind818.40.7331
Saronikos SW All Purpose858.80.6986
Saronikos SW Upwind990.70.6056
Saronikos SW Downwind742.90.8077
Saronikos NE All Purpose942.10.6369
Saronikos NE Upwind926.00.6480
Saronikos NE Downwind953.80.6291
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose735.40.8158
5-Band All Purpose Low1248.70.4805
5-Band All Purpose L/M871.60.6884
5-Band All Purpose Med710.40.8446
5-Band All Purpose M/H610.60.9826
5-Band All Purpose High569.21.0540
Single Number Predominant Upwind765.40.7839
Single Number Predominant Reaching672.30.8925
Single Number Predominant Downwind732.60.8190
5-Band 50-50 Windward/Leeward Low1577.80.3803
5-Band 50-50 Windward/Leeward L/M1081.90.5546
5-Band 50-50 Windward/Leeward Med866.50.6925
5-Band 50-50 Windward/Leeward M/H730.30.8216
5-Band 50-50 Windward/Leeward High676.00.8876
5-Band 60-40 Windward/Leeward Low1582.30.3792
5-Band 60-40 Windward/Leeward L/M1094.00.5484
5-Band 60-40 Windward/Leeward Med884.70.6782
5-Band 60-40 Windward/Leeward M/H753.80.7959
5-Band 60-40 Windward/Leeward High704.90.8512
Triple Number 50-50 Windward/Leeward Low1380.60.4346
Triple Number 50-50 Windward/Leeward Med889.70.6744
Triple Number 50-50 Windward/Leeward High713.50.8410
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward910.90.6587
Triple Number 60-40 Windward/Leeward Low1387.20.4325
Triple Number 60-40 Windward/Leeward Med907.10.6614
Triple Number 60-40 Windward/Leeward High738.30.8127
Triple Number All-Purpose Low1097.80.5465
Triple Number All-Purpose Med727.60.8246
Triple Number All-Purpose High598.01.0033
Triple Number Predominant Upwind Low1110.40.5404
Triple Number Predominant Upwind Med754.50.7952
Triple Number Predominant Upwind High637.50.9412
Triple Number Predominant Reaching Low982.00.6110
Triple Number Predominant Reaching Med669.90.8956
Triple Number Predominant Reaching High533.91.1238
Triple Number Predominant Downwind Low1113.10.5390
Triple Number Predominant Downwind Med714.70.8395
Triple Number Predominant Downwind High557.61.0761
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low1005.9
Triple Number Coastal/Long Distance Medium707.4
Triple Number Coastal/Long Distance High585.0
Triple Number Windward/Leeward Low1307.2
Triple Number Windward/Leeward Medium889.5
Triple Number Windward/Leeward High713.4
Predominantly Upwind767.2
Predominantly Downwind731.7
Predominantly Reaching690.5
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.5965
Triple Number Coastal/Long Distance Medium0.8482
Triple Number Coastal/Long Distance High1.0257
Triple Number Windward/Leeward Low0.4590
Triple Number Windward/Leeward Medium0.6745
Triple Number Windward/Leeward High0.8410
Coastal/Long Distance0.7680
Predominantly Upwind0.7820
Predominantly Downwind0.8200
For information
General Purpose Handicap (GPH)815.2
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)0.8444
Distanseseilas Trippeltall svak vind0.5965
Distanseseilas Trippeltall mellomvind0.8482
Distanseseilas Trippeltall sterk vind1.0257
Pølsebane Trippeltall svak vind0.4590
Pølsebane Trippeltall mellomvind0.6745
Pølsebane Trippeltall sterk vind0.8410
Motvind Singeltall0.7820
Medvind Singeltall0.8200
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Coastal/Long Distance781.20.7680
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind767.20.7820
Predominantly Downwind731.70.8200
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore661.80.9066
Cape Doctor Coastal544.01.1030
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.5965
Triple Number Coastal/Long Distance Medium0.8482
Triple Number Coastal/Long Distance High1.0257
Triple Number Windward/Leeward Low0.4590
Triple Number Windward/Leeward Medium0.6745
Triple Number Windward/Leeward High0.8410
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.5965
Triple Number Coastal/Long Distance Medium0.8482
Triple Number Coastal/Long Distance High1.0257
Triple Number Windward/Leeward Low0.4590
Triple Number Windward/Leeward Medium0.6745
Triple Number Windward/Leeward High0.8410
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Predominantly Upwind767.20.7820
Predominantly Downwind731.70.8200
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance781.20.7680
Triple Number Coastal/Long Distance Low1005.90.5965
Triple Number Coastal/Long Distance Medium707.40.8482
Triple Number Coastal/Long Distance High585.01.0257
Triple Number Windward/Leeward Low1307.20.4590
Triple Number Windward/Leeward Medium889.50.6745
Triple Number Windward/Leeward High713.40.8410
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2221.11472.81070.2859.4729.6651.3595.5523.1504.6
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP735.40.8158 Predom. Dn High531.31.1294 5B AP M/H596.91.0052 TriNum AP Low1005.80.5965 Predom. Rc Low1106.90.5421 5B AP High557.61.0761 TriNum AP Med707.50.8481 Predom. Rc L/M780.90.7684 5B SF Bay Low1310.60.4578 TriNum AP High585.01.0257 Predom. Rc Med642.20.9342 5B SF Bay L/M1035.60.5794 TriNum W/L Low1380.60.4346 Predom. Rc M/H557.01.0772 5B SF Bay Med840.60.7138 TriNum W/L Med889.50.6745 Predom. Rc High519.51.1549 5B SF Bay M/H715.80.8382 TriNum W/L Hig713.40.8410 5B W/L Low1577.80.3803 5B SF Bay High667.40.8991 Predom. Upwind808.70.7419 5B W/L L/M1081.90.5546 ChiMac Up Low1054.10.5692 Predom. Reaching709.40.8458 5B W/L Med866.50.6925 ChiMac Up Med916.80.6544 Predom. Downwind776.70.7725 5B W/L M/H730.30.8216 ChiMac Up High757.10.7925 Predom. Up Low1242.70.4828 5B W/L High676.00.8876 ChiMac Off Low1052.80.5699 Predom. Up L/M882.10.6802 W/L 60-40 Low1582.30.3792 ChiMac Off Med894.80.6705 Predom. Up Med733.10.8184 W/L 60-40 L/M1094.00.5484 ChiMac Off High710.70.8442 Predom. Up M/H643.50.9325 W/L 60-40 Med884.70.6782 ChiMac AP Low1045.30.5740 Predom. Up High611.80.9807 W/L 60-40 M/H753.80.7959 ChiMac AP Med899.80.6668 Predom. Dn Low1274.10.4709 W/L 60-40 High704.90.8512 ChiMac AP High729.80.8222 Predom. Dn L/M871.50.6885 5B AP Low1149.10.5222 BayMac Cove Island1230.00.4878 Predom. Dn Med694.60.8638 5B AP L/M844.30.7106 BayMac Shore1217.80.4927 Predom. Dn M/H582.61.0299 5B AP Med691.10.8681 Harvest Moon599.51.0009      SA/DSPL Up16.01SA/DSPL Dn16.01
ORC Ref  04560004V9C Issued on 15/07/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2026
BILLY P9950
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMarlow-Hunter 31MeasurementHINMHL31111D516Plan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
Length overall9.859Maximum beam3.610Draft1.357Displacement5,426Wetted area25.33IMS L9.458LSM09.680Accomod. length9.859Sink (kg/mm) 20.99
VCGD0.513VCGM0.509 RM Rated (kg·m) 131.1Limit of positive stability(°) 73.8 Stability Index 73.9 BLR index 0.0000Default crew weight657 Declared crew weight
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeSolid 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.381PBW0.100PIPA0.0159
EDL1.000ST10.042ST20.180
ST30.180ST40.112ST50.600
RIG
BackstayNot installedForestayFixedInner forestayNot installedMast materialAluminumSingle headsail furlerYesMainsail furlerIn mastArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders2Rotating mastNo
P12.490IG10.900ISP10.950MDT10.075MDL10.100MDT2MDL2TLNo TaperMWGO
E4.450J3.430BAS1.800FSDSFJSPLWPLTPSBDMWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date01/01/2013
SFFP0.245FFM0.918FF0.918LCFcl5.763SG
SAFP9.119FAM0.739FA0.739LCFsh6.032HBI0.795
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04560004V9C Issued on 15/07/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2026
BILLY P9950
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMn0.551.082.163.3327.6502/05/2026
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentGen0.561.082.183.053.9310.69NoNo 22.0801/05/2026
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
CRUISER/RACER REQUIREMENTS*
Accommodation length9.9 mTable area0.44 m²Headroom1.70 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity78 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity48 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.
ORC Ref  04560004V9C Issued on 15/07/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org