Double HandedClub Certificate2025
Mata-mataFIN11612
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
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 Angles41.8°41.8°39.7°37.9°38.3°38.1°37.8°38.2°40.1°
Beat VMG2.263.093.693.984.074.144.194.214.10
52°3.484.615.335.665.815.936.026.126.05
60°3.714.825.495.886.096.246.356.496.47
75°3.864.965.616.136.546.776.977.227.35
90°3.925.115.816.186.767.297.628.108.45
110°3.995.236.076.847.367.828.279.1810.13
120°3.835.095.996.857.728.358.9310.1911.60
135°3.364.585.536.357.278.279.5712.0013.49
150°2.723.894.895.626.367.168.0511.3414.30
Run VMG2.353.374.244.885.516.206.979.8212.38
Gybe Angles144.6°144.6°148.9°151.9°149.4°146.6°145.4°142.9°147.9°
APH ToD:628.7CDL: 5.625APH ToT: 0.9543CertNo:
BOAT
ClassSeascape 18DesignerS. ManuardBuilderISSA d.o.oAge date01/2012Series date05/2007Offset fileSEASC18r.OFFData fileFIN11612
HULL
Length Overall5.550 mMaximum Beam2.382 mDraft1.499 mDisplacement470 kgDLR2.9892IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight150 kg(declared)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail14.6515.19Headsail Luffed6.856.85Headsail FlyingSymmetricAsymmetric34.6234.62 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail3.31Storm Jib2.26Heavy Weather Jib6.10
SAIL LIMITS
Headsails5Spinnakers4
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.
Double HandedClub Certificate2025
Mata-mataFIN11612
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
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 VMG1595.41166.1975.4904.9884.6869.3858.2854.3879.0
52°1033.4780.3675.3635.7619.9607.2597.7588.5595.0
60°969.6746.2656.2611.8591.1577.1566.7554.4556.0
75°932.9725.1641.7586.9550.3531.8516.9498.9489.9
90°918.9704.2620.0582.2532.2493.9472.7444.7425.9
110°902.3688.2592.8526.4489.4460.4435.6392.1355.4
120°940.1707.5601.3525.8466.3431.2403.2353.1310.3
135°1072.3785.6650.9566.5495.5435.4376.2300.1266.8
150°1325.7925.3735.5640.7566.2502.5447.1317.5251.8
Run VMG1529.31068.5849.3738.4653.8580.2516.3366.6290.8
Selected Courses
Windward / Leeward1561.11117.3912.3821.7769.2724.8687.2610.5584.9
All purpose1176.4866.9727.6659.2614.9580.2551.6502.5482.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward786.40.7630
All purpose628.70.9543
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6449
Downwind "popa"0.8799
70% up, 30% down "Ilhabela"0.7011
30% up, 70% down "Ilhabela-inverso"0.7932
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Predominantly Upwind702.20.8545
Predominantly Downwind618.00.9708
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low797.30.7526
Triple Number AP Medium630.40.9517
Triple Number AP High540.31.1105
Triple Number Windward/Leeward Low1060.50.5658
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Single Number Predominant Upwind724.20.8285
Single Number Predominant Reaching611.20.9817
Single Number Predominant Downwind637.60.9411
Predominant Upwind - Low961.60.6240
Predominant Upwind - Low/Med760.20.7893
Predominant Upwind - Medium685.20.8757
Predominant Upwind - Med/High634.40.9458
Predominant Upwind - High607.10.9883
Predominant Downwind Low939.80.6385
Predominant Downwind Low/Med712.20.8425
Predominant Downwind Medium601.70.9971
Predominant Downwind Med/High501.01.1975
Predominant Downwind High426.71.4063
Predominant Reaching Low846.10.7091
Predominant Reaching Low/Med666.00.9008
Predominant Reaching Medium580.31.0340
Predominant Reaching Med/High506.41.1848
Predominant Reaching High461.21.3010
SA/DSPL Upwind35.65SA/DSPL Downwind81.71
Scoring OptionTODTOT
5-Band Windward/Leeward Low1177.30.5096
5-Band Windward/Leeward Low/Med889.40.6746
5-Band Windward/Leeward Medium775.40.7737
5-Band Windward/Leeward Med/High687.50.8728
5-Band Windward/Leeward High619.30.9688
Windward/Leeward 60-40 Low1187.00.5055
Windward/Leeward 60-40 Low/Med904.60.6633
Windward/Leeward 60-40 Medium798.50.7514
Windward/Leeward 60-40 Med/High722.30.8307
Windward/Leeward 60-40 High667.30.8991
5-Band AP Low870.30.6894
5-Band AP Low/Med707.40.8482
5-Band AP Medium620.50.9669
5-Band AP Med/High553.51.0841
5-Band AP High507.51.1823
5-Band SF Bay Tour - Low1019.80.5884
5-Band SF Bay Tour - Low/Med851.60.7045
5-Band SF Bay Tour - Medium746.00.8042
5-Band SF Bay Tour - Med/High666.50.9002
5-Band SF Bay Tour - High609.10.9851
Chicago-Mac Upwind0.8040
Chicago-Mac All Purpose0.8507
Chicago-Mac Downwind0.8963
Bayview-Mac Cove Island0.6317
Bayview-Mac Shore0.6360
Harvest Moon Regatta512.01.1719
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance684.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating684.00.8771
FinRating, kevyt tuuli1154.70.8660
FinRating, kova tuuli507.50.9853
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8771
Triple Number Coastal/Long Distance Low0.7526
Triple Number Coastal/Long Distance Medium0.9518
Triple Number Coastal/Long Distance High1.1105
Triple Number Windward/Leeward Low0.5912
Triple Number Windward/Leeward Medium0.7619
Triple Number Windward/Leeward High0.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
For information
General Purpose Handicap (GPH)703.6
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low797.2
Triple Number Coastal/Long Distance Medium630.4
Triple Number Coastal/Long Distance High540.3
Triple Number Windward/Leeward Low1014.9
Triple Number Windward/Leeward Medium787.5
Triple Number Windward/Leeward High667.9
Predominantly Upwind702.2
Predominantly Downwind618.0
Predominantly Reaching597.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7526
Triple Number Coastal/Long Distance Medium0.9518
Triple Number Coastal/Long Distance High1.1105
Triple Number Windward/Leeward Low0.5912
Triple Number Windward/Leeward Medium0.7619
Triple Number Windward/Leeward High0.8984
Coastal/Long Distance0.8771
Predominantly Upwind0.8545
Predominantly Downwind0.9708
For information
General Purpose Handicap (GPH)703.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9543
Distanseseilas Trippeltall svak vind0.7526
Distanseseilas Trippeltall mellomvind0.9518
Distanseseilas Trippeltall sterk vind1.1105
Pølsebane Trippeltall svak vind0.5912
Pølsebane Trippeltall mellomvind0.7619
Pølsebane Trippeltall sterk vind0.8984
Motvind Singeltall0.8545
Medvind Singeltall0.9708
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Coastal/Long Distance684.00.8771
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind702.20.8545
Predominantly Downwind618.00.9708
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore592.51.0126
Cape Doctor Coastal488.51.2283
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7526
Triple Number Coastal/Long Distance Medium0.9518
Triple Number Coastal/Long Distance High1.1105
Triple Number Windward/Leeward Low0.5912
Triple Number Windward/Leeward Medium0.7619
Triple Number Windward/Leeward High0.8984
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7526
Triple Number Coastal/Long Distance Medium0.9518
Triple Number Coastal/Long Distance High1.1105
Triple Number Windward/Leeward Low0.5912
Triple Number Windward/Leeward Medium0.7619
Triple Number Windward/Leeward High0.8984
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Predominantly Upwind702.20.8545
Predominantly Downwind618.00.9708
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance684.00.8771
Triple Number Coastal/Long Distance Low797.20.7526
Triple Number Coastal/Long Distance Medium630.40.9518
Triple Number Coastal/Long Distance High540.31.1105
Triple Number Windward/Leeward Low1014.90.5912
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1642.21112.4860.5741.3660.2603.4555.2469.7443.9
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low797.30.7526
Triple Number AP Medium630.40.9517
Triple Number AP High540.31.1105
Triple Number Windward/Leeward Low1060.50.5658
Triple Number Windward/Leeward Medium787.50.7619
Triple Number Windward/Leeward High667.90.8984
Single Number Predominant Upwind724.20.8285
Single Number Predominant Reaching611.20.9817
Single Number Predominant Downwind637.60.9411
Predominant Upwind - Low961.60.6240
Predominant Upwind - Low/Med760.20.7893
Predominant Upwind - Medium685.20.8757
Predominant Upwind - Med/High634.40.9458
Predominant Upwind - High607.10.9883
Predominant Downwind Low939.80.6385
Predominant Downwind Low/Med712.20.8425
Predominant Downwind Medium601.70.9971
Predominant Downwind Med/High501.01.1975
Predominant Downwind High426.71.4063
Predominant Reaching Low846.10.7091
Predominant Reaching Low/Med666.00.9008
Predominant Reaching Medium580.31.0340
Predominant Reaching Med/High506.41.1848
Predominant Reaching High461.21.3010
SA/DSPL Upwind35.65SA/DSPL Downwind81.71
Scoring OptionTODTOT
5-Band Windward/Leeward Low1177.30.5096
5-Band Windward/Leeward Low/Med889.40.6746
5-Band Windward/Leeward Medium775.40.7737
5-Band Windward/Leeward Med/High687.50.8728
5-Band Windward/Leeward High619.30.9688
Windward/Leeward 60-40 Low1187.00.5055
Windward/Leeward 60-40 Low/Med904.60.6633
Windward/Leeward 60-40 Medium798.50.7514
Windward/Leeward 60-40 Med/High722.30.8307
Windward/Leeward 60-40 High667.30.8991
5-Band AP Low870.30.6894
5-Band AP Low/Med707.40.8482
5-Band AP Medium620.50.9669
5-Band AP Med/High553.51.0841
5-Band AP High507.51.1823
5-Band SF Bay Tour - Low1019.80.5884
5-Band SF Bay Tour - Low/Med851.60.7045
5-Band SF Bay Tour - Medium746.00.8042
5-Band SF Bay Tour - Med/High666.50.9002
5-Band SF Bay Tour - High609.10.9851
Chicago-Mac Upwind0.8040
Chicago-Mac All Purpose0.8507
Chicago-Mac Downwind0.8963
Bayview-Mac Cove Island0.6317
Bayview-Mac Shore0.6360
Harvest Moon Regatta512.01.1719
Double HandedClub Certificate2025
Mata-mataFIN11612
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassSeascape 18MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA5.550Max. Beam2.382Draft1.499Displacement470Wetted area7.12IMS L5.552LSM05.397Acc. length5.560Sink (kg/mm) 6.04
VCGD0.002VCGM0.006RM Rated (kg·m) 12.2Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weight150
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionFixedInner stayNone FittedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders0Rotating mastNo
P6.650IG6.720ISP6.970MDT10.080MDL10.080MDT2MDL2TLNo TaperMW0.080GO0.080
E2.840J2.425BAS1.130FSD0.028SFJ0.000SPL0.000WPLTPS3.750BD0.075MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date15/03/2020
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
Mata-mataFIN11612
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment11.571.571.832.262.5814.65
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment12.176.20NoNo 6.85
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment18.806.707.755.20NaN34.62