Club Certificate2025
IMPIRL1990
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 Angles42.1°42.1°40.1°38.7°37.4°36.6°36.5°36.5°37.2°
Beat VMG2.623.604.364.875.165.285.355.405.36
52°4.045.416.366.897.147.277.347.407.40
60°4.265.656.567.037.297.437.517.587.60
75°4.385.786.677.147.427.607.747.887.97
90°4.225.646.587.127.437.677.868.148.32
110°4.045.566.697.297.637.898.088.368.47
120°3.905.406.547.227.637.958.248.709.05
135°3.464.866.046.917.437.818.168.869.75
150°2.854.125.266.257.007.467.818.509.28
Run VMG2.473.574.565.426.186.767.207.888.50
Gybe Angles145.9°145.9°149.8°151.8°158.1°165.1°170.9°177.2°177.2°
APH ToD:554.4CDL: 9.487APH ToT: 1.0823CertNo:
BOAT
ClassIOR One tonDesignerRON HOLLANDBuilderNAUTORAge date01/1976Series date01/1976Offset fileIMP.offData fileIRL1990
HULL
Length Overall12.190 mMaximum Beam3.828 mDraft2.418 mDisplacement7,295 kgDLR8.7150IMS DivisionCruiser/RacerDynamic Allowance0.230%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFeathering 3 bladesDiameter0.420m
CREW
Maximum weight646 kg(declared)Minimum weight516 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail32.8933.29Headsail Luffed52.0452.04Headsail FlyingSymmetric120.02120.02Asymmetric
STORM SAIL AREAS (m²)
Trysail9.60Storm Jib12.41Heavy Weather Jib33.49
SAIL LIMITS
Headsails5Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
1 ton by Ron Holland Hull used as the mould for Swan 391R
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
IMPIRL1990
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 VMG1373.9999.8826.3739.1698.2681.6672.8667.0671.9
52°891.1665.0566.4522.8503.9494.9490.4486.8486.6
60°844.9636.8549.0512.0494.2484.4479.5474.9473.4
75°821.6622.4539.6504.3485.5473.4465.1456.7451.9
90°852.2638.7546.8505.7484.2469.6458.3442.2432.8
110°892.1647.8538.0494.1471.7456.3445.6430.6424.8
120°922.0666.9550.1498.3471.9452.7437.0413.6397.9
135°1041.2740.2596.0520.9484.7460.9441.3406.2369.1
150°1261.5874.5683.9575.6514.3482.9460.7423.4388.0
Run VMG1458.01009.8789.7663.8582.7532.9500.1456.9423.3
Selected Courses
Windward / Leeward1414.61004.8808.0701.4640.4607.3586.4561.9547.6
All purpose1076.8779.1640.5571.2534.2513.8500.0481.9469.7
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward671.70.8933
All purpose554.41.0823
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7947
Downwind "popa"0.9260
70% up, 30% down "Ilhabela"0.8300
30% up, 70% down "Ilhabela-inverso"0.8823
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Predominantly Upwind594.71.0089
Predominantly Downwind565.51.0611
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low709.80.8453
Triple Number AP Medium550.31.0902
Triple Number AP High496.71.2080
Triple Number Windward/Leeward Low946.70.6338
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Single Number Predominant Upwind618.30.9705
Single Number Predominant Reaching556.51.0782
Single Number Predominant Downwind591.41.0146
Predominant Upwind - Low844.40.7106
Predominant Upwind - Low/Med649.30.9241
Predominant Upwind - Medium576.01.0417
Predominant Upwind - Med/High541.31.1084
Predominant Upwind - High527.61.1373
Predominant Downwind Low867.40.6917
Predominant Downwind Low/Med640.20.9372
Predominant Downwind Medium545.01.1009
Predominant Downwind Med/High489.11.2266
Predominant Downwind High458.31.3090
Predominant Reaching Low767.30.7820
Predominant Reaching Low/Med588.81.0190
Predominant Reaching Medium519.91.1541
Predominant Reaching Med/High481.51.2462
Predominant Reaching High460.01.3042
SA/DSPL Upwind22.43SA/DSPL Downwind40.38
Scoring OptionTODTOT
5-Band Windward/Leeward Low1058.40.5669
5-Band Windward/Leeward Low/Med774.70.7745
5-Band Windward/Leeward Medium654.50.9167
5-Band Windward/Leeward Med/High590.41.0163
5-Band Windward/Leeward High563.71.0644
Windward/Leeward 60-40 Low1056.70.5678
Windward/Leeward 60-40 Low/Med780.20.7690
Windward/Leeward 60-40 Medium665.80.9012
Windward/Leeward 60-40 Med/High607.40.9879
Windward/Leeward 60-40 High584.71.0261
5-Band AP Low788.70.7607
5-Band AP Low/Med620.80.9665
5-Band AP Medium542.91.1051
5-Band AP Med/High502.21.1948
5-Band AP High482.91.2424
5-Band SF Bay Tour - Low911.10.6586
5-Band SF Bay Tour - Low/Med740.70.8101
5-Band SF Bay Tour - Medium633.20.9476
5-Band SF Bay Tour - Med/High577.91.0383
5-Band SF Bay Tour - High554.11.0828
Chicago-Mac Upwind0.9426
Chicago-Mac All Purpose0.9631
Chicago-Mac Downwind0.9785
Bayview-Mac Cove Island0.7083
Bayview-Mac Shore0.7138
Harvest Moon Regatta489.61.2256
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance600.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating600.80.9986
FinRating, kevyt tuuli1042.50.9592
FinRating, kova tuuli486.71.0273
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9986
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0904
Triple Number Coastal/Long Distance High1.2080
Triple Number Windward/Leeward Low0.6620
Triple Number Windward/Leeward Medium0.9003
Triple Number Windward/Leeward High1.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
For information
General Purpose Handicap (GPH)621.6
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low709.8
Triple Number Coastal/Long Distance Medium550.3
Triple Number Coastal/Long Distance High496.7
Triple Number Windward/Leeward Low906.3
Triple Number Windward/Leeward Medium666.4
Triple Number Windward/Leeward High582.5
Predominantly Upwind594.7
Predominantly Downwind565.5
Predominantly Reaching544.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0904
Triple Number Coastal/Long Distance High1.2080
Triple Number Windward/Leeward Low0.6620
Triple Number Windward/Leeward Medium0.9003
Triple Number Windward/Leeward High1.0301
Coastal/Long Distance0.9986
Predominantly Upwind1.0089
Predominantly Downwind1.0611
For information
General Purpose Handicap (GPH)621.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0823
Distanseseilas Trippeltall svak vind0.8453
Distanseseilas Trippeltall mellomvind1.0904
Distanseseilas Trippeltall sterk vind1.2080
Pølsebane Trippeltall svak vind0.6620
Pølsebane Trippeltall mellomvind0.9003
Pølsebane Trippeltall sterk vind1.0301
Motvind Singeltall1.0089
Medvind Singeltall1.0611
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Coastal/Long Distance600.80.9986
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind594.71.0089
Predominantly Downwind565.51.0611
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore551.91.0871
Cape Doctor Coastal473.41.2675
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0904
Triple Number Coastal/Long Distance High1.2080
Triple Number Windward/Leeward Low0.6620
Triple Number Windward/Leeward Medium0.9003
Triple Number Windward/Leeward High1.0301
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0904
Triple Number Coastal/Long Distance High1.2080
Triple Number Windward/Leeward Low0.6620
Triple Number Windward/Leeward Medium0.9003
Triple Number Windward/Leeward High1.0301
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Predominantly Upwind594.71.0089
Predominantly Downwind565.51.0611
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance600.80.9986
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium550.31.0904
Triple Number Coastal/Long Distance High496.71.2080
Triple Number Windward/Leeward Low906.30.6620
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1504.31005.3762.9637.7567.3532.2505.7465.3452.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low709.80.8453
Triple Number AP Medium550.31.0902
Triple Number AP High496.71.2080
Triple Number Windward/Leeward Low946.70.6338
Triple Number Windward/Leeward Medium666.40.9003
Triple Number Windward/Leeward High582.51.0301
Single Number Predominant Upwind618.30.9705
Single Number Predominant Reaching556.51.0782
Single Number Predominant Downwind591.41.0146
Predominant Upwind - Low844.40.7106
Predominant Upwind - Low/Med649.30.9241
Predominant Upwind - Medium576.01.0417
Predominant Upwind - Med/High541.31.1084
Predominant Upwind - High527.61.1373
Predominant Downwind Low867.40.6917
Predominant Downwind Low/Med640.20.9372
Predominant Downwind Medium545.01.1009
Predominant Downwind Med/High489.11.2266
Predominant Downwind High458.31.3090
Predominant Reaching Low767.30.7820
Predominant Reaching Low/Med588.81.0190
Predominant Reaching Medium519.91.1541
Predominant Reaching Med/High481.51.2462
Predominant Reaching High460.01.3042
SA/DSPL Upwind22.43SA/DSPL Downwind40.38
Scoring OptionTODTOT
5-Band Windward/Leeward Low1058.40.5669
5-Band Windward/Leeward Low/Med774.70.7745
5-Band Windward/Leeward Medium654.50.9167
5-Band Windward/Leeward Med/High590.41.0163
5-Band Windward/Leeward High563.71.0644
Windward/Leeward 60-40 Low1056.70.5678
Windward/Leeward 60-40 Low/Med780.20.7690
Windward/Leeward 60-40 Medium665.80.9012
Windward/Leeward 60-40 Med/High607.40.9879
Windward/Leeward 60-40 High584.71.0261
5-Band AP Low788.70.7607
5-Band AP Low/Med620.80.9665
5-Band AP Medium542.91.1051
5-Band AP Med/High502.21.1948
5-Band AP High482.91.2424
5-Band SF Bay Tour - Low911.10.6586
5-Band SF Bay Tour - Low/Med740.70.8101
5-Band SF Bay Tour - Medium633.20.9476
5-Band SF Bay Tour - Med/High577.91.0383
5-Band SF Bay Tour - High554.11.0828
Chicago-Mac Upwind0.9426
Chicago-Mac All Purpose0.9631
Chicago-Mac Downwind0.9785
Bayview-Mac Cove Island0.7083
Bayview-Mac Shore0.7138
Harvest Moon Regatta489.61.2256
Club Certificate2025
IMPIRL1990
ORC
Central Rating Office
Issuing certificates for
Ireland
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassIOR One tonMeasurement04/06/2025HIN39-011Plan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA12.190Max. Beam3.828Draft2.418Displacement7,295Wetted area29.03IMS L9.826LSM09.424Acc. length12.190Sink (kg/mm) 21.31
VCGD0.133VCGM0.110RM Rated (kg·m) 164.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight632Declared crew weight646
PROPELLER
Propeller TypeFeathering 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.420PBWPIPA0.0061
PSD0.025PHD0.075PHL0.160
PSA20.0°ESL1.100
ST10.018ST20.091ST30.107
ST40.056ST50.216
RIG
Forestay tensionAftInner stayAdjustableMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingYesAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P14.320IG15.560ISP15.600MDT10.140MDL10.220MDT20.118MDL20.160TL3.200MW0.160GO0.220
E3.830J5.020BAS1.280FSDSFJ0.000SPL5.030WPLTPSBD0.098MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered164.0Flotation Date04/06/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
IMPIRL1990
ORC
Central Rating Office
Issuing certificates for
Ireland
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.821.442.4832.89
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.891.693.356.8515.20NoNo 52.04
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment015.9515.9515.959.058.95120.02
CRUISER/RACER REQUIREMENTS*
Accommodation length12.2 mTable area0.55 m²Headroom1.82 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity155 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity94 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.