Double HandedClub Certificate2025
KATANCAIRL31310
ORC
Central Rating Office
Issuing certificates for
Ireland
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 Angles42.3°42.3°40.3°39.5°38.9°38.6°38.5°38.6°39.8°
Beat VMG2.363.223.874.284.514.614.674.704.62
52°3.624.845.686.196.436.556.616.676.66
60°3.825.075.906.376.616.746.806.886.89
75°3.975.246.066.526.786.957.077.227.29
90°4.065.426.316.736.907.057.247.527.70
110°4.115.516.446.907.227.487.647.938.04
120°3.985.376.346.857.207.537.848.288.64
135°3.504.845.896.586.997.357.718.489.67
150°2.894.105.145.996.576.967.307.998.85
Run VMG2.503.554.455.195.836.396.817.478.13
Gybe Angles144.2°144.2°148.4°150.2°161.0°174.5°178.6°179.0°178.6°
APH ToD:603.1CDL: 7.709APH ToT: 0.9948CertNo:
BOAT
ClassElan 31DesignerHumphreysBuilderElanAge date03/2004Series date03/2002Offset fileELAN3110.OFFData fileIRL53196
HULL
Length Overall9.190 mMaximum Beam3.196 mDraft1.885 mDisplacement4,162 kgDLR6.9436IMS DivisionCruiser/RacerDynamic Allowance0.270%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.381m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail29.1829.83Headsail Luffed20.0320.03Headsail FlyingSymmetricAsymmetric66.1766.17 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail8.60Storm Jib6.15Heavy Weather Jib16.61
SAIL LIMITS
Headsails5Spinnakers4
✱ Asymmetric may 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.
Double HandedClub Certificate2025
KATANCAIRL31310
ORC
Central Rating Office
Issuing certificates for
Ireland
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 VMG1528.61118.6931.3840.9798.4780.6770.8766.1779.6
52°994.0743.6633.9581.8559.5549.8544.3539.4540.5
60°941.3709.4610.4565.0544.8534.5529.1523.0522.5
75°907.2686.7594.1552.3531.2518.1509.0498.8493.9
90°886.3664.5570.7535.0521.4510.7497.5478.9467.6
110°875.8653.5558.8521.5498.4481.5471.1454.3447.8
120°905.6670.5568.1525.9499.7477.9459.2434.7416.7
135°1029.7743.9611.2547.5514.9489.6467.1424.5372.2
150°1244.2878.2700.0600.7548.3517.5493.2450.6407.0
Run VMG1439.21014.0808.2693.5617.6563.3528.9482.2442.6
Selected Courses
Windward / Leeward1483.11066.3869.8767.2708.0672.0649.8624.1611.1
All purpose1127.7825.0686.9620.0584.4563.2548.3527.9514.6
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward736.70.8144
All purpose603.10.9948
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6992
Downwind "popa"0.8921
70% up, 30% down "Ilhabela"0.7477
30% up, 70% down "Ilhabela-inverso"0.8239
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Predominantly Upwind656.90.9134
Predominantly Downwind602.60.9956
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low756.00.7937
Triple Number AP Medium599.61.0007
Triple Number AP High544.41.1021
Triple Number Windward/Leeward Low1009.40.5944
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Single Number Predominant Upwind682.00.8798
Single Number Predominant Reaching596.81.0054
Single Number Predominant Downwind626.80.9573
Predominant Upwind - Low916.60.6546
Predominant Upwind - Low/Med713.00.8415
Predominant Upwind - Medium638.30.9399
Predominant Upwind - Med/High602.20.9964
Predominant Upwind - High587.11.0220
Predominant Downwind Low892.10.6726
Predominant Downwind Low/Med673.90.8903
Predominant Downwind Medium584.11.0273
Predominant Downwind Med/High526.71.1391
Predominant Downwind High491.51.2208
Predominant Reaching Low803.30.7469
Predominant Reaching Low/Med626.80.9572
Predominant Reaching Medium561.91.0678
Predominant Reaching Med/High523.31.1465
Predominant Reaching High498.31.2040
SA/DSPL Upwind18.93SA/DSPL Downwind36.68
Scoring OptionTODTOT
5-Band Windward/Leeward Low1121.60.5350
5-Band Windward/Leeward Low/Med838.70.7154
5-Band Windward/Leeward Medium720.40.8329
5-Band Windward/Leeward Med/High654.10.9173
5-Band Windward/Leeward High626.30.9580
Windward/Leeward 60-40 Low1132.10.5300
Windward/Leeward 60-40 Low/Med852.40.7039
Windward/Leeward 60-40 Medium738.60.8124
Windward/Leeward 60-40 Med/High678.10.8848
Windward/Leeward 60-40 High654.90.9162
5-Band AP Low827.70.7249
5-Band AP Low/Med668.50.8975
5-Band AP Medium592.31.0130
5-Band AP Med/High550.41.0901
5-Band AP High529.21.1339
5-Band SF Bay Tour - Low973.00.6167
5-Band SF Bay Tour - Low/Med804.30.7460
5-Band SF Bay Tour - Medium698.50.8589
5-Band SF Bay Tour - Med/High641.40.9355
5-Band SF Bay Tour - High616.20.9738
Chicago-Mac Upwind0.8553
Chicago-Mac All Purpose0.8921
Chicago-Mac Downwind0.9252
Bayview-Mac Cove Island0.6653
Bayview-Mac Shore0.6696
Harvest Moon Regatta526.31.1400
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance654.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating654.50.9167
FinRating, kevyt tuuli1099.10.9099
FinRating, kova tuuli532.70.9387
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9167
Triple Number Coastal/Long Distance Low0.7937
Triple Number Coastal/Long Distance Medium1.0008
Triple Number Coastal/Long Distance High1.1021
Triple Number Windward/Leeward Low0.6198
Triple Number Windward/Leeward Medium0.8194
Triple Number Windward/Leeward High0.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
For information
General Purpose Handicap (GPH)672.7
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low756.0
Triple Number Coastal/Long Distance Medium599.5
Triple Number Coastal/Long Distance High544.4
Triple Number Windward/Leeward Low968.1
Triple Number Windward/Leeward Medium732.2
Triple Number Windward/Leeward High645.7
Predominantly Upwind656.9
Predominantly Downwind602.6
Predominantly Reaching582.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7937
Triple Number Coastal/Long Distance Medium1.0008
Triple Number Coastal/Long Distance High1.1021
Triple Number Windward/Leeward Low0.6198
Triple Number Windward/Leeward Medium0.8194
Triple Number Windward/Leeward High0.9292
Coastal/Long Distance0.9167
Predominantly Upwind0.9134
Predominantly Downwind0.9956
For information
General Purpose Handicap (GPH)672.7
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9948
Distanseseilas Trippeltall svak vind0.7937
Distanseseilas Trippeltall mellomvind1.0008
Distanseseilas Trippeltall sterk vind1.1021
Pølsebane Trippeltall svak vind0.6198
Pølsebane Trippeltall mellomvind0.8194
Pølsebane Trippeltall sterk vind0.9292
Motvind Singeltall0.9134
Medvind Singeltall0.9956
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Coastal/Long Distance654.50.9167
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind656.90.9134
Predominantly Downwind602.60.9956
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore615.00.9756
Cape Doctor Coastal518.61.1570
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7937
Triple Number Coastal/Long Distance Medium1.0008
Triple Number Coastal/Long Distance High1.1021
Triple Number Windward/Leeward Low0.6198
Triple Number Windward/Leeward Medium0.8194
Triple Number Windward/Leeward High0.9292
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7937
Triple Number Coastal/Long Distance Medium1.0008
Triple Number Coastal/Long Distance High1.1021
Triple Number Windward/Leeward Low0.6198
Triple Number Windward/Leeward Medium0.8194
Triple Number Windward/Leeward High0.9292
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Predominantly Upwind656.90.9134
Predominantly Downwind602.60.9956
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.50.9167
Triple Number Coastal/Long Distance Low756.00.7937
Triple Number Coastal/Long Distance Medium599.51.0008
Triple Number Coastal/Long Distance High544.41.1021
Triple Number Windward/Leeward Low968.10.6198
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1562.61061.1818.3694.3623.2584.2553.3505.1491.2
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low756.00.7937
Triple Number AP Medium599.61.0007
Triple Number AP High544.41.1021
Triple Number Windward/Leeward Low1009.40.5944
Triple Number Windward/Leeward Medium732.20.8194
Triple Number Windward/Leeward High645.70.9292
Single Number Predominant Upwind682.00.8798
Single Number Predominant Reaching596.81.0054
Single Number Predominant Downwind626.80.9573
Predominant Upwind - Low916.60.6546
Predominant Upwind - Low/Med713.00.8415
Predominant Upwind - Medium638.30.9399
Predominant Upwind - Med/High602.20.9964
Predominant Upwind - High587.11.0220
Predominant Downwind Low892.10.6726
Predominant Downwind Low/Med673.90.8903
Predominant Downwind Medium584.11.0273
Predominant Downwind Med/High526.71.1391
Predominant Downwind High491.51.2208
Predominant Reaching Low803.30.7469
Predominant Reaching Low/Med626.80.9572
Predominant Reaching Medium561.91.0678
Predominant Reaching Med/High523.31.1465
Predominant Reaching High498.31.2040
SA/DSPL Upwind18.93SA/DSPL Downwind36.68
Scoring OptionTODTOT
5-Band Windward/Leeward Low1121.60.5350
5-Band Windward/Leeward Low/Med838.70.7154
5-Band Windward/Leeward Medium720.40.8329
5-Band Windward/Leeward Med/High654.10.9173
5-Band Windward/Leeward High626.30.9580
Windward/Leeward 60-40 Low1132.10.5300
Windward/Leeward 60-40 Low/Med852.40.7039
Windward/Leeward 60-40 Medium738.60.8124
Windward/Leeward 60-40 Med/High678.10.8848
Windward/Leeward 60-40 High654.90.9162
5-Band AP Low827.70.7249
5-Band AP Low/Med668.50.8975
5-Band AP Medium592.31.0130
5-Band AP Med/High550.41.0901
5-Band AP High529.21.1339
5-Band SF Bay Tour - Low973.00.6167
5-Band SF Bay Tour - Low/Med804.30.7460
5-Band SF Bay Tour - Medium698.50.8589
5-Band SF Bay Tour - Med/High641.40.9355
5-Band SF Bay Tour - High616.20.9738
Chicago-Mac Upwind0.8553
Chicago-Mac All Purpose0.8921
Chicago-Mac Downwind0.9252
Bayview-Mac Cove Island0.6653
Bayview-Mac Shore0.6696
Harvest Moon Regatta526.31.1400
Double HandedClub Certificate2025
KATANCAIRL31310
ORC
Central Rating Office
Issuing certificates for
Ireland
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassElan 31Measurement05/06/2025HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.190Max. Beam3.196Draft1.885Displacement4,162Wetted area19.55IMS L8.421LSM08.431Acc. length9.190Sink (kg/mm) 15.01
VCGD0.040VCGM0.085RM Rated (kg·m) 74.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.381PBWPIPA0.0006
EDLST1ST2
ST3ST4ST5
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P11.470IG11.090ISP13.110MDT10.090MDL10.143MDT2MDL2TLTaperMWGO
E4.280J3.280BAS1.480FSDSFJSPL3.320WPLTPS4.030BD0.140MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered74.0Flotation Date05/06/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
KATANCAIRL31310
ORC
Central Rating Office
Issuing certificates for
Ireland
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.921.622.6729.18
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.510.941.783.4211.40NoNo 20.03
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment011.969.8310.907.297.28100%66.17
CRUISER/RACER REQUIREMENTS*
Accommodation length9.2 mTable area0.44 m²Headroom1.64 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity64 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity34 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.