Club 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°39.5°37.6°36.9°36.7°36.6°37.0°38.9°
Beat VMG2.703.774.524.885.025.095.145.155.01
52°4.215.666.486.816.947.027.087.147.11
60°4.505.916.646.977.137.227.307.397.39
75°4.716.066.747.117.387.547.667.847.92
90°4.585.956.707.127.457.768.018.388.64
110°4.125.706.697.217.658.058.368.929.52
120°3.955.516.547.127.618.128.719.6610.41
135°3.434.926.056.767.267.798.3910.0412.54
150°2.834.145.286.216.847.307.799.0511.16
Run VMG2.453.584.575.426.116.667.098.009.66
Gybe Angles138.1°144.7°149.5°154.2°162.8°170.0°176.3°166.0°142.3°
APH ToD:557.4CDL: 8.488APH ToT: 1.0764CertNo: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 weight481 kg(default)Minimum weight351 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 111.2
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  03390004JI3 Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club 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 VMG1331.3954.7796.8737.7717.0707.1700.9699.5718.8
52°855.4636.0555.5528.3518.5512.9508.5504.3506.6
60°800.1609.0542.3516.4504.9498.5493.3487.5487.2
75°764.3593.6534.0506.3488.1477.7470.3459.2454.7
90°785.6605.0537.2505.8483.0464.2449.3429.5416.8
110°874.8632.1538.1499.0470.8447.0430.7403.8378.0
120°911.3653.3550.7505.8473.1443.2413.5372.6345.9
135°1050.5731.8594.9532.2495.7462.4429.3358.7287.0
150°1271.2870.6682.4579.4526.7493.4462.3398.0322.7
Run VMG1467.81005.2788.0664.8589.1540.6507.5449.9372.6
Selected Courses
Windward / Leeward1399.5980.0792.4701.3653.1623.8604.2574.7545.7
All purpose1053.1755.9631.0574.1542.9521.9505.2477.9454.5
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward678.30.8845
All purpose557.41.0764
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.7904
Downwind "popa"0.9241
70% up, 30% down "Ilhabela"0.8263
30% up, 70% down "Ilhabela-inverso"0.8795
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Predominantly Upwind599.01.0017
Predominantly Downwind567.21.0578
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP578.11.0378 Predom. Rc High447.01.3423 5B SF Bay L/M731.00.8208 TriNum AP Low693.40.8653 Predom. Dn Low855.10.7017 5B SF Bay Med642.50.9338 TriNum AP Med555.51.0802 Predom. Dn L/M638.70.9394 5B SF Bay M/H591.31.0148 TriNum AP High499.11.2020 Predom. Dn Med550.81.0894 5B SF Bay High560.31.0709 TriNum W/L Low928.40.6463 Predom. Dn M/H488.91.2272 5B AP Low770.40.7788 TriNum W/L Med673.40.8910 Predom. Dn High441.21.3599 5B AP L/M616.30.9735 TriNum W/L Hig598.01.0033 ChiMac Up Low729.60.8224 5B AP Med548.81.0934 Predom. Upwind620.40.9670 ChiMac Up Med668.70.8972 5B AP M/H506.61.1843 Predom. Reaching553.21.0845 ChiMac Up High596.51.0059 5B AP High478.61.2538 Predom. Downwind590.31.0164 ChiMac Off Low739.70.8111 5B W/L Low1038.00.5781 Predom. Up Low816.80.7345 ChiMac Off Med655.80.9148 5B W/L L/M767.30.7819 Predom. Up L/M642.40.9341 ChiMac Off High553.51.0841 5B W/L Med663.70.9041 Predom. Up Med584.91.0259 ChiMac AP Low730.90.8209 5B W/L M/H606.60.9891 Predom. Up M/H553.81.0834 ChiMac AP Med659.60.9096 5B W/L High574.81.0439 Predom. Up High536.61.1182 ChiMac AP High573.41.0463 W/L 60-40 Low1032.20.5813 Predom. Rc Low745.00.8053 BayMac Cove Island836.70.7171 W/L 60-40 L/M771.30.7779 Predom. Rc L/M584.81.0260 BayMac Shore828.80.7240 W/L 60-40 Med675.70.8879 Predom. Rc Med524.11.1447 Harvest Moon490.41.2235 W/L 60-40 M/H625.90.9586 Predom. Rc M/H480.21.2494 5B SF Bay Low872.70.6875 W/L 60-40 High600.40.9993      SA/DSPL Up31.53SA/DSPL Dn48.72
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance603.4
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating603.40.9944
FinRating, kevyt tuuli1023.20.9773
FinRating, kova tuuli479.61.0425
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.9944
Triple Number Coastal/Long Distance Low0.8653
Triple Number Coastal/Long Distance Medium1.0803
Triple Number Coastal/Long Distance High1.2020
Triple Number Windward/Leeward Low0.6771
Triple Number Windward/Leeward Medium0.8910
Triple Number Windward/Leeward High1.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
For information
General Purpose Handicap (GPH)620.7
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Saronikos S All Purpose618.40.9702
Saronikos S Upwind687.50.8727
Saronikos S Downwind538.61.1141
Saronikos N All Purpose655.60.9152
Saronikos N Upwind715.50.8386
Saronikos N Downwind594.91.0085
Saronikos SW All Purpose618.10.9707
Saronikos SW Upwind698.90.8585
Saronikos SW Downwind545.91.0991
Saronikos NE All Purpose678.90.8838
Saronikos NE Upwind673.60.8908
Saronikos NE Downwind665.30.9019
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose578.11.0378
5-Band All Purpose Low831.40.7217
5-Band All Purpose L/M638.70.9395
5-Band All Purpose Med566.61.0590
5-Band All Purpose M/H520.51.1528
5-Band All Purpose High488.81.2274
Single Number Predominant Upwind597.21.0047
Single Number Predominant Reaching535.91.1197
Single Number Predominant Downwind568.71.0551
5-Band 50-50 Windward/Leeward Low1038.00.5781
5-Band 50-50 Windward/Leeward L/M767.30.7819
5-Band 50-50 Windward/Leeward Med663.70.9041
5-Band 50-50 Windward/Leeward M/H606.60.9891
5-Band 50-50 Windward/Leeward High574.81.0439
5-Band 60-40 Windward/Leeward Low1032.20.5813
5-Band 60-40 Windward/Leeward L/M771.30.7779
5-Band 60-40 Windward/Leeward Med675.70.8879
5-Band 60-40 Windward/Leeward M/H625.90.9586
5-Band 60-40 Windward/Leeward High600.40.9993
Triple Number 50-50 Windward/Leeward Low928.40.6463
Triple Number 50-50 Windward/Leeward Med673.50.8909
Triple Number 50-50 Windward/Leeward High598.01.0033
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward690.00.8696
Triple Number 60-40 Windward/Leeward Low925.80.6481
Triple Number 60-40 Windward/Leeward Med684.40.8766
Triple Number 60-40 Windward/Leeward High618.80.9696
Triple Number All-Purpose Low752.20.7977
Triple Number All-Purpose Med573.81.0457
Triple Number All-Purpose High512.11.1715
Triple Number Predominant Upwind Low751.90.7980
Triple Number Predominant Upwind Med592.21.0132
Triple Number Predominant Upwind High555.31.0805
Triple Number Predominant Reaching Low682.50.8791
Triple Number Predominant Reaching Med538.61.1140
Triple Number Predominant Reaching High463.11.2957
Triple Number Predominant Downwind Low765.40.7839
Triple Number Predominant Downwind Med561.01.0696
Triple Number Predominant Downwind High466.81.2853
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low693.4
Triple Number Coastal/Long Distance Medium555.4
Triple Number Coastal/Long Distance High499.2
Triple Number Windward/Leeward Low886.1
Triple Number Windward/Leeward Medium673.4
Triple Number Windward/Leeward High598.0
Predominantly Upwind599.0
Predominantly Downwind567.2
Predominantly Reaching544.3
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8653
Triple Number Coastal/Long Distance Medium1.0803
Triple Number Coastal/Long Distance High1.2020
Triple Number Windward/Leeward Low0.6771
Triple Number Windward/Leeward Medium0.8910
Triple Number Windward/Leeward High1.0033
Coastal/Long Distance0.9944
Predominantly Upwind1.0017
Predominantly Downwind1.0578
For information
General Purpose Handicap (GPH)620.7
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.0764
Distanseseilas Trippeltall svak vind0.8653
Distanseseilas Trippeltall mellomvind1.0803
Distanseseilas Trippeltall sterk vind1.2020
Pølsebane Trippeltall svak vind0.6771
Pølsebane Trippeltall mellomvind0.8910
Pølsebane Trippeltall sterk vind1.0033
Motvind Singeltall1.0017
Medvind Singeltall1.0578
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Coastal/Long Distance603.40.9944
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind599.01.0017
Predominantly Downwind567.21.0578
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore554.41.0823
Cape Doctor Coastal461.51.3001
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8653
Triple Number Coastal/Long Distance Medium1.0803
Triple Number Coastal/Long Distance High1.2020
Triple Number Windward/Leeward Low0.6771
Triple Number Windward/Leeward Medium0.8910
Triple Number Windward/Leeward High1.0033
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8653
Triple Number Coastal/Long Distance Medium1.0803
Triple Number Coastal/Long Distance High1.2020
Triple Number Windward/Leeward Low0.6771
Triple Number Windward/Leeward Medium0.8910
Triple Number Windward/Leeward High1.0033
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Predominantly Upwind599.01.0017
Predominantly Downwind567.21.0578
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance603.40.9944
Triple Number Coastal/Long Distance Low693.40.8653
Triple Number Coastal/Long Distance Medium555.41.0803
Triple Number Coastal/Long Distance High499.21.2020
Triple Number Windward/Leeward Low886.10.6771
Triple Number Windward/Leeward Medium673.40.8910
Triple Number Windward/Leeward High598.01.0033
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.4982.5749.5639.1577.5541.2509.0455.7433.0
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP578.11.0378 Predom. Dn High441.21.3599 5B AP M/H506.61.1843 TriNum AP Low693.40.8653 Predom. Rc Low745.00.8053 5B AP High478.61.2538 TriNum AP Med555.51.0802 Predom. Rc L/M584.81.0260 5B SF Bay Low872.70.6875 TriNum AP High499.11.2020 Predom. Rc Med524.11.1447 5B SF Bay L/M731.00.8208 TriNum W/L Low928.40.6463 Predom. Rc M/H480.21.2494 5B SF Bay Med642.50.9338 TriNum W/L Med673.40.8910 Predom. Rc High447.01.3423 5B SF Bay M/H591.31.0148 TriNum W/L Hig598.01.0033 5B W/L Low1038.00.5781 5B SF Bay High560.31.0709 Predom. Upwind620.40.9670 5B W/L L/M767.30.7819 ChiMac Up Low729.60.8224 Predom. Reaching553.21.0845 5B W/L Med663.70.9041 ChiMac Up Med668.70.8972 Predom. Downwind590.31.0164 5B W/L M/H606.60.9891 ChiMac Up High596.51.0059 Predom. Up Low816.80.7345 5B W/L High574.81.0439 ChiMac Off Low739.70.8111 Predom. Up L/M642.40.9341 W/L 60-40 Low1032.20.5813 ChiMac Off Med655.80.9148 Predom. Up Med584.91.0259 W/L 60-40 L/M771.30.7779 ChiMac Off High553.51.0841 Predom. Up M/H553.81.0834 W/L 60-40 Med675.70.8879 ChiMac AP Low730.90.8209 Predom. Up High536.61.1182 W/L 60-40 M/H625.90.9586 ChiMac AP Med659.60.9096 Predom. Dn Low855.10.7017 W/L 60-40 High600.40.9993 ChiMac AP High573.41.0463 Predom. Dn L/M638.70.9394 5B AP Low770.40.7788 BayMac Cove Island836.70.7171 Predom. Dn Med550.81.0894 5B AP L/M616.30.9735 BayMac Shore828.80.7240 Predom. Dn M/H488.91.2272 5B AP Med548.81.0934 Harvest Moon490.41.2235      SA/DSPL Up31.53SA/DSPL Dn48.72
ORC Ref  03390004JI3 Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club 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 L8.301LSM07.774Accomod. length9.269Sink (kg/mm) 13.24
VCGD-0.092VCGM-0.030 RM Rated (kg·m) 65.7Limit of positive stability(°) 117.4 Stability Index 111.2 BLR index 0.0000Default crew weight481 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  03390004JI3 Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club 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  03390004JI3 Issued on 01/04/2026 Valid until 31/03/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org