Double HandedClub Certificate2026
U.LA.LAJPN 6426
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
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 Angles44.9°42.0°39.3°38.5°38.9°38.8°38.9°40.2°43.1°
Beat VMG2.763.824.404.614.704.764.794.724.49
52°4.295.726.396.606.706.776.806.816.72
60°4.585.976.596.806.906.987.037.077.02
75°4.806.136.757.047.197.307.407.507.53
90°4.686.046.737.127.407.617.778.038.20
110°4.175.766.707.197.527.778.018.609.21
120°4.015.596.597.147.618.098.459.129.36
135°3.484.996.136.827.337.878.5410.2611.52
150°2.884.195.346.286.897.387.929.3911.77
Run VMG2.503.634.635.476.156.707.158.2110.19
Gybe Angles138.7°144.4°149.2°154.3°162.1°168.7°171.4°160.0°147.0°
APH ToD:569.1CDL: 7.868APH ToT: 1.0543CertNo:260490
BOAT
ClassYOKOYAMA 30 IMSDesignerI.YOKOYAMABuilderTY SEISAKUSHOAge date09/1996Series date09/1996Offset fileJ085.OFFData fileJC260490
HULL
Length Overall9.269 mMaximum Beam3.098 mDraft1.988 mDisplacement2,537 kgDLR5.3994IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.650%RS Assessment-0.254%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.390m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail31.3732.15Headsail Luffed27.4627.46Headsail FlyingSymmetric59.5459.54Asymmetric
STORM SAIL AREAS Maximum (m²)
Trysail9.06Storm Jib6.69Heavy Weather Jib18.06
SAIL LIMITS
Headsails5Spinnakers4
STABILITY
Righting Moment 65.7 kg·m Stability Index 116.0
COMMENTS
Change from Cert NO.JC090130
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  03390004JIW Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Double HandedClub Certificate2026
U.LA.LAJPN 6426
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
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 VMG1302.7942.0817.9780.6765.2756.3752.1762.5801.2
52°838.8629.0563.7545.6537.4532.1529.0528.3535.6
60°785.6602.7546.0529.4521.5515.7512.1509.4512.9
75°750.4587.1533.5511.4500.9492.9486.7480.0478.4
90°769.2596.1534.9505.7486.3473.3463.3448.1439.0
110°862.3625.1537.1500.7478.5463.3449.2418.7390.9
120°898.1644.3546.5504.5473.1445.0426.2394.6384.7
135°1033.8721.4587.5527.9491.3457.4421.5350.7312.5
150°1249.6858.9674.1573.7522.8487.9454.4383.5305.9
Run VMG1442.9991.8778.4658.1585.2537.7503.7438.5353.2
Selected Courses
Windward / Leeward1372.8966.9798.1719.3675.2647.0627.9600.5577.2
All purpose1033.7746.1633.3584.3556.7537.5522.2497.4482.2
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward696.80.8611
All purpose569.11.0543
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.7531
Downwind "popa"0.9347
70% up, 30% down "Ilhabela"0.7997
30% up, 70% down "Ilhabela-inverso"0.8717
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Predominantly Upwind616.80.9728
Predominantly Downwind568.61.0552
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP588.71.0193 Predom. Rc High462.01.2987 5B SF Bay L/M741.30.8094 TriNum AP Low689.70.8699 Predom. Dn Low843.70.7112 5B SF Bay Med663.20.9047 TriNum AP Med567.51.0573 Predom. Dn L/M637.00.9419 5B SF Bay M/H615.40.9750 TriNum AP High516.71.1612 Predom. Dn Med553.81.0834 5B SF Bay High588.61.0193 TriNum W/L Low923.70.6496 Predom. Dn M/H493.41.2160 5B AP Low761.20.7882 TriNum W/L Med693.10.8657 Predom. Dn High447.41.3411 5B AP L/M621.30.9657 TriNum W/L Hig622.40.9640 ChiMac Up Low733.40.8181 5B AP Med561.51.0685 Predom. Upwind637.20.9417 ChiMac Up Med680.70.8815 5B AP M/H523.51.1462 Predom. Reaching558.31.0746 ChiMac Up High617.00.9724 5B AP High499.01.2023 Predom. Downwind591.31.0147 ChiMac Off Low734.10.8173 5B W/L Low1026.20.5847 Predom. Up Low808.50.7421 ChiMac Off Med654.00.9174 5B W/L L/M777.10.7721 Predom. Up L/M653.30.9184 ChiMac Off High555.81.0796 5B W/L Med684.10.8771 Predom. Up Med605.30.9913 ChiMac AP Low729.90.8220 5B W/L M/H630.50.9517 Predom. Up M/H578.51.0371 ChiMac AP Med664.60.9028 5B W/L High601.20.9980 Predom. Up High567.01.0581 ChiMac AP High584.81.0259 W/L 60-40 Low1021.20.5876 Predom. Rc Low735.50.8157 BayMac Cove Island834.00.7194 W/L 60-40 L/M784.70.7646 Predom. Rc L/M585.91.0241 BayMac Shore826.10.7263 W/L 60-40 Med701.20.8557 Predom. Rc Med530.81.1303 Harvest Moon496.21.2093 W/L 60-40 M/H655.50.9153 Predom. Rc M/H490.81.2225 5B SF Bay Low864.80.6938 W/L 60-40 High634.50.9457      SA/DSPL Up31.53SA/DSPL Dn48.72
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance616.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating616.70.9729
FinRating, kevyt tuuli1010.40.9897
FinRating, kova tuuli502.30.9955
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.9729
Triple Number Coastal/Long Distance Low0.8699
Triple Number Coastal/Long Distance Medium1.0573
Triple Number Coastal/Long Distance High1.1612
Triple Number Windward/Leeward Low0.6799
Triple Number Windward/Leeward Medium0.8657
Triple Number Windward/Leeward High0.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
For information
General Purpose Handicap (GPH)629.2
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Saronikos S All Purpose628.00.9555
Saronikos S Upwind705.00.8510
Saronikos S Downwind532.81.1262
Saronikos N All Purpose667.20.8993
Saronikos N Upwind729.40.8226
Saronikos N Downwind590.31.0165
Saronikos SW All Purpose622.60.9637
Saronikos SW Upwind706.50.8493
Saronikos SW Downwind542.91.1052
Saronikos NE All Purpose685.70.8750
Saronikos NE Upwind682.80.8788
Saronikos NE Downwind660.10.9089
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose588.71.0193
5-Band All Purpose Low821.50.7304
5-Band All Purpose L/M643.10.9330
5-Band All Purpose Med578.21.0377
5-Band All Purpose M/H535.41.1206
5-Band All Purpose High507.51.1822
Single Number Predominant Upwind614.90.9758
Single Number Predominant Reaching541.21.1086
Single Number Predominant Downwind570.31.0521
5-Band 50-50 Windward/Leeward Low1026.20.5847
5-Band 50-50 Windward/Leeward L/M777.10.7721
5-Band 50-50 Windward/Leeward Med684.10.8771
5-Band 50-50 Windward/Leeward M/H630.50.9517
5-Band 50-50 Windward/Leeward High601.20.9980
5-Band 60-40 Windward/Leeward Low1021.20.5876
5-Band 60-40 Windward/Leeward L/M784.70.7646
5-Band 60-40 Windward/Leeward Med701.20.8557
5-Band 60-40 Windward/Leeward M/H655.50.9153
5-Band 60-40 Windward/Leeward High634.50.9457
Triple Number 50-50 Windward/Leeward Low923.70.6496
Triple Number 50-50 Windward/Leeward Med693.20.8656
Triple Number 50-50 Windward/Leeward High622.40.9640
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward713.30.8412
Triple Number 60-40 Windward/Leeward Low922.60.6503
Triple Number 60-40 Windward/Leeward Med709.10.8462
Triple Number 60-40 Windward/Leeward High649.30.9240
Triple Number All-Purpose Low747.10.8031
Triple Number All-Purpose Med584.81.0260
Triple Number All-Purpose High527.71.1370
Triple Number Predominant Upwind Low749.90.8001
Triple Number Predominant Upwind Med611.80.9808
Triple Number Predominant Upwind High583.51.0283
Triple Number Predominant Reaching Low676.90.8864
Triple Number Predominant Reaching Med545.91.0991
Triple Number Predominant Reaching High473.51.2670
Triple Number Predominant Downwind Low757.70.7919
Triple Number Predominant Downwind Med562.41.0668
Triple Number Predominant Downwind High468.41.2809
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low689.7
Triple Number Coastal/Long Distance Medium567.5
Triple Number Coastal/Long Distance High516.7
Triple Number Windward/Leeward Low882.5
Triple Number Windward/Leeward Medium693.1
Triple Number Windward/Leeward High622.4
Predominantly Upwind616.8
Predominantly Downwind568.6
Predominantly Reaching547.7
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8699
Triple Number Coastal/Long Distance Medium1.0573
Triple Number Coastal/Long Distance High1.1612
Triple Number Windward/Leeward Low0.6799
Triple Number Windward/Leeward Medium0.8657
Triple Number Windward/Leeward High0.9640
Coastal/Long Distance0.9729
Predominantly Upwind0.9728
Predominantly Downwind1.0552
For information
General Purpose Handicap (GPH)629.2
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.0543
Distanseseilas Trippeltall svak vind0.8699
Distanseseilas Trippeltall mellomvind1.0573
Distanseseilas Trippeltall sterk vind1.1612
Pølsebane Trippeltall svak vind0.6799
Pølsebane Trippeltall mellomvind0.8657
Pølsebane Trippeltall sterk vind0.9640
Motvind Singeltall0.9728
Medvind Singeltall1.0552
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Coastal/Long Distance616.70.9729
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind616.80.9728
Predominantly Downwind568.61.0552
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore584.21.0271
Cape Doctor Coastal486.81.2327
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8699
Triple Number Coastal/Long Distance Medium1.0573
Triple Number Coastal/Long Distance High1.1612
Triple Number Windward/Leeward Low0.6799
Triple Number Windward/Leeward Medium0.8657
Triple Number Windward/Leeward High0.9640
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8699
Triple Number Coastal/Long Distance Medium1.0573
Triple Number Coastal/Long Distance High1.1612
Triple Number Windward/Leeward Low0.6799
Triple Number Windward/Leeward Medium0.8657
Triple Number Windward/Leeward High0.9640
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Predominantly Upwind616.80.9728
Predominantly Downwind568.61.0552
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance616.70.9729
Triple Number Coastal/Long Distance Low689.70.8699
Triple Number Coastal/Long Distance Medium567.51.0573
Triple Number Coastal/Long Distance High516.71.1612
Triple Number Windward/Leeward Low882.50.6799
Triple Number Windward/Leeward Medium693.10.8657
Triple Number Windward/Leeward High622.40.9640
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1379.8969.4753.6652.9593.6556.8526.1474.1458.2
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP588.71.0193 Predom. Dn High447.41.3411 5B AP M/H523.51.1462 TriNum AP Low689.70.8699 Predom. Rc Low735.50.8157 5B AP High499.01.2023 TriNum AP Med567.51.0573 Predom. Rc L/M585.91.0241 5B SF Bay Low864.80.6938 TriNum AP High516.71.1612 Predom. Rc Med530.81.1303 5B SF Bay L/M741.30.8094 TriNum W/L Low923.70.6496 Predom. Rc M/H490.81.2225 5B SF Bay Med663.20.9047 TriNum W/L Med693.10.8657 Predom. Rc High462.01.2987 5B SF Bay M/H615.40.9750 TriNum W/L Hig622.40.9640 5B W/L Low1026.20.5847 5B SF Bay High588.61.0193 Predom. Upwind637.20.9417 5B W/L L/M777.10.7721 ChiMac Up Low733.40.8181 Predom. Reaching558.31.0746 5B W/L Med684.10.8771 ChiMac Up Med680.70.8815 Predom. Downwind591.31.0147 5B W/L M/H630.50.9517 ChiMac Up High617.00.9724 Predom. Up Low808.50.7421 5B W/L High601.20.9980 ChiMac Off Low734.10.8173 Predom. Up L/M653.30.9184 W/L 60-40 Low1021.20.5876 ChiMac Off Med654.00.9174 Predom. Up Med605.30.9913 W/L 60-40 L/M784.70.7646 ChiMac Off High555.81.0796 Predom. Up M/H578.51.0371 W/L 60-40 Med701.20.8557 ChiMac AP Low729.90.8220 Predom. Up High567.01.0581 W/L 60-40 M/H655.50.9153 ChiMac AP Med664.60.9028 Predom. Dn Low843.70.7112 W/L 60-40 High634.50.9457 ChiMac AP High584.81.0259 Predom. Dn L/M637.00.9419 5B AP Low761.20.7882 BayMac Cove Island834.00.7194 Predom. Dn Med553.81.0834 5B AP L/M621.30.9657 BayMac Shore826.10.7263 Predom. Dn M/H493.41.2160 5B AP Med561.51.0685 Harvest Moon496.21.2093      SA/DSPL Up31.53SA/DSPL Dn48.72
ORC Ref  03390004JIW Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Double HandedClub Certificate2026
U.LA.LAJPN 6426
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassYOKOYAMA 30 IMSMeasurement17/09/1996HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
Length overall9.269Maximum beam3.098Draft1.988Displacement2,537Wetted area16.58IMS L8.120LSM07.774Accomod. length9.269Sink (kg/mm) 13.24
VCGD-0.091VCGM-0.029 RM Rated (kg·m) 65.7Limit of positive stability(°) 122.2 Stability Index 116.0 BLR index 0.0000Default crew weight170 Declared crew weight 0
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.390PBWPIPA0.0006
EDLST1ST2
ST3ST4ST5
RIG
BackstayAdjustableForestayFixedInner forestayNot installedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysYesCheckstaysNoSpreaders2Rotating mastNo
P11.800IG11.529ISP12.145MDT10.098MDL10.140MDT2MDL2TLTaperMW0.140GO0.150
E4.385J3.320BAS1.699FSDFoilSFJ0.000SPL3.730WPLTPSBDMWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date24/02/1997
SFFP0.220FFM1.165FF1.173LCFcl4.963SG
SAFP9.001FAM0.854FA0.858LCFsh5.190HBI1.017
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03390004JIW Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Double HandedClub Certificate2026
U.LA.LAJPN 6426
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.000.971.722.883.7331.37
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment14.6511.60NoNo 27.4624.6211.31NoNo 26.60
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment311.9611.9611.966.035.7559.54111.4611.4611.465.986.0457.22211.4311.4311.435.985.9856.96
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
ORC Ref  03390004JIW Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org