Club Certificate2025
Tandopa2KOR5070
Korean Sailing Federation
Olympic Convention Center
Olympic-ro 424
Songpa-gu, Seoul, S.Korea
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 Angles41.4°41.4°38.8°37.1°36.3°36.0°35.7°35.9°37.4°
Beat VMG3.014.094.845.175.325.415.485.525.40
52°4.676.096.917.217.347.437.517.597.56
60°4.946.357.097.407.557.667.747.857.86
75°5.126.507.197.597.858.008.148.338.41
90°4.986.397.157.618.008.318.538.889.13
110°4.886.407.347.918.308.638.959.5810.08
120°4.716.257.277.908.489.019.4510.3411.26
135°4.085.646.827.518.128.799.6311.7813.56
150°3.364.735.906.847.467.998.5410.2713.70
Run VMG2.914.105.115.936.547.117.618.9011.87
Gybe Angles142.2°142.2°146.2°151.1°160.6°167.1°168.2°143.0°145.4°
APH ToD:516.4CDL: 9.512APH ToT: 1.1619CertNo:063/25
BOAT
ClassNelson Marek 35DesignerNelson/MarekBuilderDencho YachtAge date01/1994Series date01/1994Offset fileJ096.offData fileKOR5070
HULL
Length Overall10.685 mMaximum Beam3.176 mDraft2.474 mDisplacement3,328 kgDLR5.0863IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight563 kg(default)Minimum weight433 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail41.1142.07Headsail Luffed36.7436.74Headsail FlyingSymmetric91.4091.40Asymmetric107.91107.91 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail11.99Storm Jib9.01Heavy Weather Jib24.32
SAIL LIMITS
Headsails5Spinnakers4
✱ Asymmetric SHALL NOT be tacked on the pole
STABILITY
Righting MomentN/AStability IndexN/A
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
Tandopa2KOR5070
Korean Sailing Federation
Olympic Convention Center
Olympic-ro 424
Songpa-gu, Seoul, S.Korea
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 VMG1194.8880.4744.2696.9676.5665.0657.1652.1667.2
52°771.7590.9520.8499.5490.1484.2479.5474.5476.2
60°728.8567.3507.9486.5476.7470.2465.0458.7458.0
75°703.0553.6500.4474.0458.6449.9442.5432.4428.2
90°722.5563.3503.3473.0449.9433.4422.1405.4394.3
110°737.7562.7490.3455.2434.0417.4402.3375.9357.2
120°764.3575.7495.3455.9424.5399.7381.1348.3319.8
135°881.9638.2527.7479.2443.3409.3374.0305.6265.4
150°1070.6760.3609.8526.0482.3450.8421.6350.4262.7
Run VMG1236.7878.0704.1606.8550.5506.0473.3404.6303.4
Selected Courses
Windward / Leeward1215.5879.2724.1651.9613.5585.5565.2528.4485.3
All purpose918.9682.7579.0532.4505.6486.0470.0440.9416.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward630.80.9511
All purpose516.41.1619
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8447
Downwind "popa"1.0186
70% up, 30% down "Ilhabela"0.8903
30% up, 70% down "Ilhabela-inverso"0.9594
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Predominantly Upwind558.61.0741
Predominantly Downwind519.21.1555
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low630.80.9511
Triple Number AP Medium515.81.1633
Triple Number AP High463.11.2957
Triple Number Windward/Leeward Low835.80.7178
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Single Number Predominant Upwind575.91.0419
Single Number Predominant Reaching507.91.1813
Single Number Predominant Downwind536.01.1194
Predominant Upwind - Low742.30.8083
Predominant Upwind - Low/Med597.01.0051
Predominant Upwind - Medium547.21.0965
Predominant Upwind - Med/High516.91.1608
Predominant Upwind - High498.51.2035
Predominant Downwind Low754.30.7954
Predominant Downwind Low/Med580.31.0339
Predominant Downwind Medium506.71.1841
Predominant Downwind Med/High447.91.3395
Predominant Downwind High399.01.5039
Predominant Reaching Low670.80.8945
Predominant Reaching Low/Med537.91.1155
Predominant Reaching Medium484.61.2381
Predominant Reaching Med/High442.81.3549
Predominant Reaching High411.31.4587
SA/DSPL Upwind34.79SA/DSPL Downwind66.59
Scoring OptionTODTOT
5-Band Windward/Leeward Low924.60.6490
5-Band Windward/Leeward Low/Med705.10.8509
5-Band Windward/Leeward Medium620.30.9673
5-Band Windward/Leeward Med/High566.41.0593
5-Band Windward/Leeward High527.31.1379
Windward/Leeward 60-40 Low924.60.6489
Windward/Leeward 60-40 Low/Med711.60.8431
Windward/Leeward 60-40 Medium632.60.9484
Windward/Leeward 60-40 Med/High585.01.0257
Windward/Leeward 60-40 High552.91.0851
5-Band AP Low688.90.8709
5-Band AP Low/Med567.01.0583
5-Band AP Medium509.91.1768
5-Band AP Med/High470.81.2745
5-Band AP High441.61.3586
5-Band SF Bay Tour - Low800.90.7492
5-Band SF Bay Tour - Low/Med674.50.8896
5-Band SF Bay Tour - Medium598.41.0027
5-Band SF Bay Tour - Med/High549.41.0920
5-Band SF Bay Tour - High513.71.1679
Chicago-Mac Upwind1.0161
Chicago-Mac All Purpose1.0493
Chicago-Mac Downwind1.0784
Bayview-Mac Cove Island0.7990
Bayview-Mac Shore0.8048
Harvest Moon Regatta447.71.3402
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance558.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating558.91.0735
FinRating, kevyt tuuli907.61.1018
FinRating, kova tuuli442.51.1301
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0735
Triple Number Coastal/Long Distance Low0.9511
Triple Number Coastal/Long Distance Medium1.1634
Triple Number Coastal/Long Distance High1.2957
Triple Number Windward/Leeward Low0.7484
Triple Number Windward/Leeward Medium0.9546
Triple Number Windward/Leeward High1.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
For information
General Purpose Handicap (GPH)572.3
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low630.8
Triple Number Coastal/Long Distance Medium515.7
Triple Number Coastal/Long Distance High463.1
Triple Number Windward/Leeward Low801.7
Triple Number Windward/Leeward Medium628.5
Triple Number Windward/Leeward High556.4
Predominantly Upwind558.6
Predominantly Downwind519.2
Predominantly Reaching500.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9511
Triple Number Coastal/Long Distance Medium1.1634
Triple Number Coastal/Long Distance High1.2957
Triple Number Windward/Leeward Low0.7484
Triple Number Windward/Leeward Medium0.9546
Triple Number Windward/Leeward High1.0783
Coastal/Long Distance1.0735
Predominantly Upwind1.0741
Predominantly Downwind1.1555
For information
General Purpose Handicap (GPH)572.3
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.1619
Distanseseilas Trippeltall svak vind0.9511
Distanseseilas Trippeltall mellomvind1.1634
Distanseseilas Trippeltall sterk vind1.2957
Pølsebane Trippeltall svak vind0.7484
Pølsebane Trippeltall mellomvind0.9546
Pølsebane Trippeltall sterk vind1.0783
Motvind Singeltall1.0741
Medvind Singeltall1.1555
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Coastal/Long Distance558.91.0735
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind558.61.0741
Predominantly Downwind519.21.1555
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore498.21.2043
Cape Doctor Coastal423.61.4165
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9511
Triple Number Coastal/Long Distance Medium1.1634
Triple Number Coastal/Long Distance High1.2957
Triple Number Windward/Leeward Low0.7484
Triple Number Windward/Leeward Medium0.9546
Triple Number Windward/Leeward High1.0783
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9511
Triple Number Coastal/Long Distance Medium1.1634
Triple Number Coastal/Long Distance High1.2957
Triple Number Windward/Leeward Low0.7484
Triple Number Windward/Leeward Medium0.9546
Triple Number Windward/Leeward High1.0783
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Predominantly Upwind558.61.0741
Predominantly Downwind519.21.1555
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance558.91.0735
Triple Number Coastal/Long Distance Low630.80.9511
Triple Number Coastal/Long Distance Medium515.71.1634
Triple Number Coastal/Long Distance High463.11.2957
Triple Number Windward/Leeward Low801.70.7484
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1285.8879.1685.1593.1538.1503.5474.5423.5396.6
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low630.80.9511
Triple Number AP Medium515.81.1633
Triple Number AP High463.11.2957
Triple Number Windward/Leeward Low835.80.7178
Triple Number Windward/Leeward Medium628.50.9546
Triple Number Windward/Leeward High556.41.0783
Single Number Predominant Upwind575.91.0419
Single Number Predominant Reaching507.91.1813
Single Number Predominant Downwind536.01.1194
Predominant Upwind - Low742.30.8083
Predominant Upwind - Low/Med597.01.0051
Predominant Upwind - Medium547.21.0965
Predominant Upwind - Med/High516.91.1608
Predominant Upwind - High498.51.2035
Predominant Downwind Low754.30.7954
Predominant Downwind Low/Med580.31.0339
Predominant Downwind Medium506.71.1841
Predominant Downwind Med/High447.91.3395
Predominant Downwind High399.01.5039
Predominant Reaching Low670.80.8945
Predominant Reaching Low/Med537.91.1155
Predominant Reaching Medium484.61.2381
Predominant Reaching Med/High442.81.3549
Predominant Reaching High411.31.4587
SA/DSPL Upwind34.79SA/DSPL Downwind66.59
Scoring OptionTODTOT
5-Band Windward/Leeward Low924.60.6490
5-Band Windward/Leeward Low/Med705.10.8509
5-Band Windward/Leeward Medium620.30.9673
5-Band Windward/Leeward Med/High566.41.0593
5-Band Windward/Leeward High527.31.1379
Windward/Leeward 60-40 Low924.60.6489
Windward/Leeward 60-40 Low/Med711.60.8431
Windward/Leeward 60-40 Medium632.60.9484
Windward/Leeward 60-40 Med/High585.01.0257
Windward/Leeward 60-40 High552.91.0851
5-Band AP Low688.90.8709
5-Band AP Low/Med567.01.0583
5-Band AP Medium509.91.1768
5-Band AP Med/High470.81.2745
5-Band AP High441.61.3586
5-Band SF Bay Tour - Low800.90.7492
5-Band SF Bay Tour - Low/Med674.50.8896
5-Band SF Bay Tour - Medium598.41.0027
5-Band SF Bay Tour - Med/High549.41.0920
5-Band SF Bay Tour - High513.71.1679
Chicago-Mac Upwind1.0161
Chicago-Mac All Purpose1.0493
Chicago-Mac Downwind1.0784
Bayview-Mac Cove Island0.7990
Bayview-Mac Shore0.8048
Harvest Moon Regatta447.71.3402
Club Certificate2025
Tandopa2KOR5070
Korean Sailing Federation
Olympic Convention Center
Olympic-ro 424
Songpa-gu, Seoul, S.Korea
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassNelson Marek 35Measurement07/06/2024HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.685Max. Beam3.176Draft2.474Displacement3,328Wetted area20.29IMS L9.281LSM08.681Acc. length10.322Sink (kg/mm) 15.16
VCGD-0.338VCGM-0.272RM Rated (kg·m) 96.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight563Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBW0.100PIPA0.0030
EDL0.600ST10.048ST20.170
ST30.170ST40.098ST50.250
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstaysCheckstaysSpreaders2Rotating mastNo
P13.620IG13.420ISP15.800MDT10.115MDL10.180MDT20.115MDL20.180TLMWGO
E5.030J3.900BAS1.970FSDSFJSPL4.350WPLTPS4.430BD0.150MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date27/05/2024
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
Tandopa2KOR5070
Korean Sailing Federation
Olympic Convention Center
Olympic-ro 424
Songpa-gu, Seoul, S.Korea
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.311.161.963.244.1941.1107/06/2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.080.721.392.774.125.4913.30NoNo 36.7407/06/202410.110.591.102.012.863.7713.14YesNo 25.8407/06/2024C2
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment014.5514.5514.557.567.4591.4007/06/2024
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment016.7614.0215.398.468.23103%107.9107/06/2024A1014.6212.6713.657.328.1490%85.1007/06/2024A3