Club Certificate2025
ON THE ROCKSSITA 1204
Turkiye
Sailing
Federation
www.tyf.org.tr/
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 Angles43.6°43.6°41.9°39.6°37.7°37.4°37.5°38.6°40.3°
Beat VMG2.213.073.764.244.534.614.644.604.51
52°3.434.695.596.056.356.506.586.646.62
60°3.684.945.796.226.576.796.907.027.02
75°3.865.105.906.376.807.197.467.767.90
90°4.115.426.256.727.027.327.878.659.10
110°4.205.536.417.137.808.318.809.7910.83
120°4.075.396.307.037.888.779.5210.9612.42
135°3.524.865.906.587.288.189.2812.6414.41
150°2.874.115.185.976.577.157.9210.9214.05
Run VMG2.493.564.495.185.706.196.869.4612.17
Gybe Angles143.7°143.7°148.0°151.6°151.6°148.7°145.4°140.4°145.2°
APH ToD:595.1CDL: 6.884APH ToT: 1.0083CertNo:
BOAT
ClassJ-70 ONE DESIGNDesignerJOHNSTONEBuilderJ BOATSAge date02/2013Series date02/2012Offset fileJ-70.OD.OFFData fileTUR1081
HULL
Length Overall6.942 mMaximum Beam2.260 mDraft1.450 mDisplacement812 kgDLR3.3788IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.422%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight330 kg(declared)Minimum weight200 kg ✱ when appliedNon Manual PowerNoCrew Arm ExtensionLoose or no lifelines
SAIL AREAS (m²)
MeasuredRatedMainsail15.4616.09Headsail Luffed10.0010.00Headsail FlyingSymmetricAsymmetric45.6445.64 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail4.02Storm Jib3.39Heavy Weather Jib9.13
SAIL LIMITS
Headsails5
✱ One set on the forestay
✱ Woven polyester sails
Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
OUTBOARD ENGINE SUZUKI 2.5
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.
Club Certificate2025
ON THE ROCKSSITA 1204
Turkiye
Sailing
Federation
www.tyf.org.tr/
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 VMG1629.91173.1958.6849.5795.4781.3776.3782.2798.8
52°1049.0768.4644.3594.8567.1553.9547.1542.0544.1
60°978.8729.0622.2579.0548.4530.6522.1512.9512.5
75°933.5705.6610.0565.4529.7500.7482.9463.8455.6
90°875.9664.3576.0536.1513.0492.0457.6416.1395.7
110°857.2651.5562.0504.7461.5433.4409.2367.9332.3
120°884.9667.4571.9512.2456.9410.6378.3328.3289.9
135°1024.1740.7610.5547.0494.4440.1387.8284.8249.9
150°1254.4876.2694.8602.9548.1503.6454.4329.7256.2
Run VMG1447.11011.7802.2694.6632.0581.5524.7380.7295.8
Selected Courses
Windward / Leeward1538.01092.4880.4772.0713.7681.4650.5581.4547.3
All purpose1156.2840.6695.2622.8578.1548.5521.8472.8448.8
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward741.60.8091
All purpose595.11.0083
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6867
Downwind "popa"0.9076
70% up, 30% down "Ilhabela"0.7408
30% up, 70% down "Ilhabela-inverso"0.8277
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Predominantly Upwind658.20.9116
Predominantly Downwind593.71.0106
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low767.90.7813
Triple Number AP Medium595.41.0077
Triple Number AP High510.11.1762
Triple Number Windward/Leeward Low1030.80.5821
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Single Number Predominant Upwind683.70.8775
Single Number Predominant Reaching583.21.0288
Single Number Predominant Downwind612.20.9801
Predominant Upwind - Low944.70.6351
Predominant Upwind - Low/Med723.70.8291
Predominant Upwind - Medium638.40.9398
Predominant Upwind - Med/High589.61.0176
Predominant Upwind - High562.41.0668
Predominant Downwind Low898.50.6678
Predominant Downwind Low/Med675.80.8878
Predominant Downwind Medium578.21.0378
Predominant Downwind Med/High490.01.2244
Predominant Downwind High411.41.4586
Predominant Reaching Low811.80.7391
Predominant Reaching Low/Med630.10.9523
Predominant Reaching Medium553.51.0840
Predominant Reaching Med/High486.71.2328
Predominant Reaching High434.31.3815
SA/DSPL Upwind29.28SA/DSPL Downwind70.25
Scoring OptionTODTOT
5-Band Windward/Leeward Low1151.00.5213
5-Band Windward/Leeward Low/Med848.80.7069
5-Band Windward/Leeward Medium726.70.8257
5-Band Windward/Leeward Med/High649.40.9240
5-Band Windward/Leeward High587.51.0213
Windward/Leeward 60-40 Low1167.50.5139
Windward/Leeward 60-40 Low/Med864.60.6940
Windward/Leeward 60-40 Medium744.20.8063
Windward/Leeward 60-40 Med/High675.40.8883
Windward/Leeward 60-40 High626.80.9573
5-Band AP Low839.00.7151
5-Band AP Low/Med673.80.8905
5-Band AP Medium585.71.0244
5-Band AP Med/High522.81.1477
5-Band AP High477.11.2576
5-Band SF Bay Tour - Low995.80.6025
5-Band SF Bay Tour - Low/Med813.70.7374
5-Band SF Bay Tour - Medium698.80.8586
5-Band SF Bay Tour - Med/High626.80.9573
5-Band SF Bay Tour - High573.51.0462
Chicago-Mac Upwind0.8497
Chicago-Mac All Purpose0.8952
Chicago-Mac Downwind0.9379
Bayview-Mac Cove Island0.6543
Bayview-Mac Shore0.6585
Harvest Moon Regatta492.81.2176
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance646.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9275
Triple Number Coastal/Long Distance Low0.7813
Triple Number Coastal/Long Distance Medium1.0078
Triple Number Coastal/Long Distance High1.1762
Triple Number Windward/Leeward Low0.6083
Triple Number Windward/Leeward Medium0.8119
Triple Number Windward/Leeward High0.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
For information
General Purpose Handicap (GPH)669.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low768.0
Triple Number Coastal/Long Distance Medium595.4
Triple Number Coastal/Long Distance High510.1
Triple Number Windward/Leeward Low986.4
Triple Number Windward/Leeward Medium739.0
Triple Number Windward/Leeward High632.3
Predominantly Upwind658.2
Predominantly Downwind593.7
Predominantly Reaching571.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7813
Triple Number Coastal/Long Distance Medium1.0078
Triple Number Coastal/Long Distance High1.1762
Triple Number Windward/Leeward Low0.6083
Triple Number Windward/Leeward Medium0.8119
Triple Number Windward/Leeward High0.9489
Coastal/Long Distance0.9275
Predominantly Upwind0.9116
Predominantly Downwind1.0106
For information
General Purpose Handicap (GPH)669.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0083
Distanseseilas Trippeltall svak vind0.7813
Distanseseilas Trippeltall mellomvind1.0078
Distanseseilas Trippeltall sterk vind1.1762
Pølsebane Trippeltall svak vind0.6083
Pølsebane Trippeltall mellomvind0.8119
Pølsebane Trippeltall sterk vind0.9489
Motvind Singeltall0.9116
Medvind Singeltall1.0106
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Coastal/Long Distance646.90.9275
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind658.20.9116
Predominantly Downwind593.71.0106
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore557.61.0761
Cape Doctor Coastal456.01.3158
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7813
Triple Number Coastal/Long Distance Medium1.0078
Triple Number Coastal/Long Distance High1.1762
Triple Number Windward/Leeward Low0.6083
Triple Number Windward/Leeward Medium0.8119
Triple Number Windward/Leeward High0.9489
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7813
Triple Number Coastal/Long Distance Medium1.0078
Triple Number Coastal/Long Distance High1.1762
Triple Number Windward/Leeward Low0.6083
Triple Number Windward/Leeward Medium0.8119
Triple Number Windward/Leeward High0.9489
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Predominantly Upwind658.20.9116
Predominantly Downwind593.71.0106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.90.9275
Triple Number Coastal/Long Distance Low768.00.7813
Triple Number Coastal/Long Distance Medium595.41.0078
Triple Number Coastal/Long Distance High510.11.1762
Triple Number Windward/Leeward Low986.40.6083
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1617.11084.4827.6697.9617.7569.8524.6442.8414.8
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low767.90.7813
Triple Number AP Medium595.41.0077
Triple Number AP High510.11.1762
Triple Number Windward/Leeward Low1030.80.5821
Triple Number Windward/Leeward Medium739.00.8119
Triple Number Windward/Leeward High632.30.9489
Single Number Predominant Upwind683.70.8775
Single Number Predominant Reaching583.21.0288
Single Number Predominant Downwind612.20.9801
Predominant Upwind - Low944.70.6351
Predominant Upwind - Low/Med723.70.8291
Predominant Upwind - Medium638.40.9398
Predominant Upwind - Med/High589.61.0176
Predominant Upwind - High562.41.0668
Predominant Downwind Low898.50.6678
Predominant Downwind Low/Med675.80.8878
Predominant Downwind Medium578.21.0378
Predominant Downwind Med/High490.01.2244
Predominant Downwind High411.41.4586
Predominant Reaching Low811.80.7391
Predominant Reaching Low/Med630.10.9523
Predominant Reaching Medium553.51.0840
Predominant Reaching Med/High486.71.2328
Predominant Reaching High434.31.3815
SA/DSPL Upwind29.28SA/DSPL Downwind70.25
Scoring OptionTODTOT
5-Band Windward/Leeward Low1151.00.5213
5-Band Windward/Leeward Low/Med848.80.7069
5-Band Windward/Leeward Medium726.70.8257
5-Band Windward/Leeward Med/High649.40.9240
5-Band Windward/Leeward High587.51.0213
Windward/Leeward 60-40 Low1167.50.5139
Windward/Leeward 60-40 Low/Med864.60.6940
Windward/Leeward 60-40 Medium744.20.8063
Windward/Leeward 60-40 Med/High675.40.8883
Windward/Leeward 60-40 High626.80.9573
5-Band AP Low839.00.7151
5-Band AP Low/Med673.80.8905
5-Band AP Medium585.71.0244
5-Band AP Med/High522.81.1477
5-Band AP High477.11.2576
5-Band SF Bay Tour - Low995.80.6025
5-Band SF Bay Tour - Low/Med813.70.7374
5-Band SF Bay Tour - Medium698.80.8586
5-Band SF Bay Tour - Med/High626.80.9573
5-Band SF Bay Tour - High573.51.0462
Chicago-Mac Upwind0.8497
Chicago-Mac All Purpose0.8952
Chicago-Mac Downwind0.9379
Bayview-Mac Cove Island0.6543
Bayview-Mac Shore0.6585
Harvest Moon Regatta492.81.2176
Club Certificate2025
ON THE ROCKSSITA 1204
Turkiye
Sailing
Federation
www.tyf.org.tr/
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ-70 ONE DESIGNMeasurement13/04/2019HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA6.942Max. Beam2.260Draft1.450Displacement812Wetted area9.16IMS L6.719LSM06.217Acc. length6.942Sink (kg/mm) 7.48
VCGD-0.171VCGM-0.175RM Rated (kg·m) 20.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight349Declared crew weight330
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P7.975IG8.153ISP9.412MDT10.076MDL10.131MDT20.070MDL20.070TL1.000MW0.116GO0.136
E2.876J2.340BAS1.145FSD0.030SFJ0.175SPLWPLTPS4.025BD0.095MWT24.00MCG3.880
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date09/04/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
ON THE ROCKSSITA 1204
Turkiye
Sailing
Federation
www.tyf.org.tr/
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommenta0.370.881.432.142.5715.4613/04/2019
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentA0.060.350.651.251.862.458.00YesNo 10.0013/04/2019
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA10.808.809.805.565.7098%45.6413/04/2019WHITE