Club Certificate2025
MAYKTUR 1731
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 Angles43.4°43.4°41.6°39.6°37.4°36.8°36.8°37.7°39.4°
Beat VMG2.223.083.764.254.564.674.714.694.60
52°3.444.695.586.066.376.566.656.736.71
60°3.684.935.776.226.566.836.967.107.12
75°3.845.085.886.356.787.197.517.848.02
90°4.105.416.256.767.067.347.818.729.24
110°4.195.516.397.117.818.368.869.9011.03
120°4.055.386.276.997.838.759.5911.1312.61
135°3.504.845.886.557.238.089.1412.6914.59
150°2.864.105.165.956.547.107.8310.7813.96
Run VMG2.483.554.475.175.676.156.789.3412.09
Gybe Angles143.8°143.8°148.0°151.6°152.1°149.4°145.6°139.6°144.5°
APH ToD:594.2CDL: 6.949APH ToT: 1.0097CertNo:
BOAT
ClassJ-70 ONE DESIGNDesignerJOHNSTONEBuilderJ BOATSAge date04/2023Series date02/2012Offset fileJ-70.OD.OFFData fileTUR1731 MAYK
HULL
Length Overall6.942 mMaximum Beam2.260 mDraft1.450 mDisplacement812 kgDLR3.4046IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.422%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight365 kg(declared)Minimum weight235 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
Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
OUTBOARD ENGINE ELECTRICAL
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
MAYKTUR 1731
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 VMG1624.71170.3957.0847.8789.2770.7764.1767.5782.6
52°1047.3768.4644.9594.3565.4549.0541.4534.8536.1
60°979.2730.2623.4579.2548.4527.1517.3506.7505.4
75°937.7708.3611.9567.1531.2500.9479.6458.9449.0
90°878.6665.6575.6532.7509.7490.5460.9412.7389.4
110°859.4653.2563.7506.1460.7430.6406.2363.6326.4
120°888.0669.5573.8515.1460.1411.5375.2323.6285.5
135°1028.7743.3612.4549.5498.0445.3393.8283.8246.7
150°1257.9879.1697.2604.6550.5507.1459.9333.8257.9
Run VMG1451.31015.1805.0696.6634.5585.6531.1385.5297.8
Selected Courses
Windward / Leeward1537.51092.7881.0772.2711.9678.1647.6576.5540.2
All purpose1157.1841.5696.0623.0577.4546.7519.8468.6442.4
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward739.90.8109
All purpose594.21.0097
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6923
Downwind "popa"0.9026
70% up, 30% down "Ilhabela"0.7443
30% up, 70% down "Ilhabela-inverso"0.8272
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Predominantly Upwind656.00.9146
Predominantly Downwind595.31.0078
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low768.70.7805
Triple Number AP Medium594.81.0087
Triple Number AP High507.31.1826
Triple Number Windward/Leeward Low1031.10.5819
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Single Number Predominant Upwind681.00.8811
Single Number Predominant Reaching582.71.0296
Single Number Predominant Downwind613.30.9783
Predominant Upwind - Low944.40.6353
Predominant Upwind - Low/Med723.00.8298
Predominant Upwind - Medium636.00.9434
Predominant Upwind - Med/High585.01.0257
Predominant Upwind - High555.31.0804
Predominant Downwind Low900.50.6663
Predominant Downwind Low/Med677.00.8863
Predominant Downwind Medium579.31.0357
Predominant Downwind Med/High491.81.2200
Predominant Downwind High410.41.4619
Predominant Reaching Low813.00.7380
Predominant Reaching Low/Med630.10.9522
Predominant Reaching Medium553.01.0849
Predominant Reaching Med/High486.71.2327
Predominant Reaching High431.21.3916
SA/DSPL Upwind29.28SA/DSPL Downwind70.25
Scoring OptionTODTOT
5-Band Windward/Leeward Low1151.10.5212
5-Band Windward/Leeward Low/Med848.90.7068
5-Band Windward/Leeward Medium725.00.8275
5-Band Windward/Leeward Med/High646.10.9287
5-Band Windward/Leeward High582.51.0300
Windward/Leeward 60-40 Low1167.00.5141
Windward/Leeward 60-40 Low/Med864.10.6944
Windward/Leeward 60-40 Medium741.60.8090
Windward/Leeward 60-40 Med/High670.40.8949
Windward/Leeward 60-40 High619.90.9679
5-Band AP Low840.60.7138
5-Band AP Low/Med674.20.8900
5-Band AP Medium584.91.0257
5-Band AP Med/High520.61.1526
5-Band AP High473.01.2686
5-Band SF Bay Tour - Low995.90.6024
5-Band SF Bay Tour - Low/Med813.60.7374
5-Band SF Bay Tour - Medium697.10.8607
5-Band SF Bay Tour - Med/High623.00.9631
5-Band SF Bay Tour - High567.71.0570
Chicago-Mac Upwind0.8522
Chicago-Mac All Purpose0.8959
Chicago-Mac Downwind0.9362
Bayview-Mac Cove Island0.6543
Bayview-Mac Shore0.6585
Harvest Moon Regatta492.91.2172
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance646.1
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9287
Triple Number Coastal/Long Distance Low0.7805
Triple Number Coastal/Long Distance Medium1.0088
Triple Number Coastal/Long Distance High1.1826
Triple Number Windward/Leeward Low0.6080
Triple Number Windward/Leeward Medium0.8134
Triple Number Windward/Leeward High0.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
For information
General Purpose Handicap (GPH)668.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low768.7
Triple Number Coastal/Long Distance Medium594.8
Triple Number Coastal/Long Distance High507.4
Triple Number Windward/Leeward Low986.8
Triple Number Windward/Leeward Medium737.6
Triple Number Windward/Leeward High628.5
Predominantly Upwind656.0
Predominantly Downwind595.3
Predominantly Reaching572.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7805
Triple Number Coastal/Long Distance Medium1.0088
Triple Number Coastal/Long Distance High1.1826
Triple Number Windward/Leeward Low0.6080
Triple Number Windward/Leeward Medium0.8134
Triple Number Windward/Leeward High0.9546
Coastal/Long Distance0.9287
Predominantly Upwind0.9146
Predominantly Downwind1.0078
For information
General Purpose Handicap (GPH)668.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0097
Distanseseilas Trippeltall svak vind0.7805
Distanseseilas Trippeltall mellomvind1.0088
Distanseseilas Trippeltall sterk vind1.1826
Pølsebane Trippeltall svak vind0.6080
Pølsebane Trippeltall mellomvind0.8134
Pølsebane Trippeltall sterk vind0.9546
Motvind Singeltall0.9146
Medvind Singeltall1.0078
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Coastal/Long Distance646.10.9287
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind656.00.9146
Predominantly Downwind595.31.0078
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore551.11.0887
Cape Doctor Coastal450.21.3326
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7805
Triple Number Coastal/Long Distance Medium1.0088
Triple Number Coastal/Long Distance High1.1826
Triple Number Windward/Leeward Low0.6080
Triple Number Windward/Leeward Medium0.8134
Triple Number Windward/Leeward High0.9546
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7805
Triple Number Coastal/Long Distance Medium1.0088
Triple Number Coastal/Long Distance High1.1826
Triple Number Windward/Leeward Low0.6080
Triple Number Windward/Leeward Medium0.8134
Triple Number Windward/Leeward High0.9546
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Predominantly Upwind656.00.9146
Predominantly Downwind595.31.0078
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance646.10.9287
Triple Number Coastal/Long Distance Low768.70.7805
Triple Number Coastal/Long Distance Medium594.81.0088
Triple Number Coastal/Long Distance High507.41.1826
Triple Number Windward/Leeward Low986.80.6080
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1616.81084.9828.3698.1616.8567.5522.5438.8409.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low768.70.7805
Triple Number AP Medium594.81.0087
Triple Number AP High507.31.1826
Triple Number Windward/Leeward Low1031.10.5819
Triple Number Windward/Leeward Medium737.60.8134
Triple Number Windward/Leeward High628.50.9546
Single Number Predominant Upwind681.00.8811
Single Number Predominant Reaching582.71.0296
Single Number Predominant Downwind613.30.9783
Predominant Upwind - Low944.40.6353
Predominant Upwind - Low/Med723.00.8298
Predominant Upwind - Medium636.00.9434
Predominant Upwind - Med/High585.01.0257
Predominant Upwind - High555.31.0804
Predominant Downwind Low900.50.6663
Predominant Downwind Low/Med677.00.8863
Predominant Downwind Medium579.31.0357
Predominant Downwind Med/High491.81.2200
Predominant Downwind High410.41.4619
Predominant Reaching Low813.00.7380
Predominant Reaching Low/Med630.10.9522
Predominant Reaching Medium553.01.0849
Predominant Reaching Med/High486.71.2327
Predominant Reaching High431.21.3916
SA/DSPL Upwind29.28SA/DSPL Downwind70.25
Scoring OptionTODTOT
5-Band Windward/Leeward Low1151.10.5212
5-Band Windward/Leeward Low/Med848.90.7068
5-Band Windward/Leeward Medium725.00.8275
5-Band Windward/Leeward Med/High646.10.9287
5-Band Windward/Leeward High582.51.0300
Windward/Leeward 60-40 Low1167.00.5141
Windward/Leeward 60-40 Low/Med864.10.6944
Windward/Leeward 60-40 Medium741.60.8090
Windward/Leeward 60-40 Med/High670.40.8949
Windward/Leeward 60-40 High619.90.9679
5-Band AP Low840.60.7138
5-Band AP Low/Med674.20.8900
5-Band AP Medium584.91.0257
5-Band AP Med/High520.61.1526
5-Band AP High473.01.2686
5-Band SF Bay Tour - Low995.90.6024
5-Band SF Bay Tour - Low/Med813.60.7374
5-Band SF Bay Tour - Medium697.10.8607
5-Band SF Bay Tour - Med/High623.00.9631
5-Band SF Bay Tour - High567.71.0570
Chicago-Mac Upwind0.8522
Chicago-Mac All Purpose0.8959
Chicago-Mac Downwind0.9362
Bayview-Mac Cove Island0.6543
Bayview-Mac Shore0.6585
Harvest Moon Regatta492.91.2172
Club Certificate2025
MAYKTUR 1731
Turkiye
Sailing
Federation
www.tyf.org.tr/
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ-70 ONE DESIGNMeasurement20/06/2023HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA6.942Max. Beam2.260Draft1.450Displacement812Wetted area9.15IMS L6.738LSM06.201Acc. length6.942Sink (kg/mm) 7.43
VCGD-0.175VCGM-0.179RM Rated (kg·m) 20.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight348Declared crew weight365
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
E2.876J2.340BAS1.145FSD0.000SFJ0.175SPL0.000WPLTPS4.025BD0.095MWT24.00MCG3.880
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date14/03/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
MAYKTUR 1731
Turkiye
Sailing
Federation
www.tyf.org.tr/
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentA0.370.881.432.142.5715.46CLASS
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentA0.060.350.651.251.862.458.00YesNo 10.00CLASS
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA10.808.809.805.565.7098%45.64