Club Certificate2025
BANDERSNATCH OF HOWTHIR2848
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 Angles43.4°43.4°41.5°40.4°39.2°38.7°38.2°37.8°38.4°
Beat VMG2.403.263.914.404.734.905.005.095.05
52°3.714.965.826.386.696.876.987.057.08
60°3.935.206.046.556.837.017.147.237.29
75°4.065.356.186.676.967.167.327.547.63
90°3.945.246.116.656.987.207.407.707.92
110°3.735.116.156.797.167.447.687.998.21
120°3.594.966.026.727.137.457.738.238.59
135°3.244.515.576.416.937.297.618.208.82
150°2.703.884.925.826.536.977.307.898.47
Run VMG2.343.364.275.055.766.316.747.367.89
Gybe Angles147.4°147.4°151.4°152.8°158.8°164.8°170.9°177.4°177.7°
APH ToD:596.6CDL: 8.286APH ToT: 1.0057CertNo:
BOAT
ClassSWAN 37DesignerSPARKMAN & STEPHENBuilderNAUTOS KYAge date01/1971Series date01/1970Offset fileSWN37S&S.offData file37-027
HULL
Length Overall11.079 mMaximum Beam3.268 mDraft1.871 mDisplacement6,924 kgDLR10.6347IMS DivisionCruiser/RacerDynamic Allowance0.430%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.412m
CREW
Maximum weight561 kg(default)Minimum weight431 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail24.1824.37Headsail Luffed52.8852.88Headsail FlyingSymmetric100.84100.84Asymmetric
STORM SAIL AREAS (m²)
Trysail7.71Storm Jib9.96Heavy Weather Jib26.89
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
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
BANDERSNATCH OF HOWTHIR2848
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 VMG1497.61103.1920.8818.5761.2734.5719.8707.9713.2
52°970.0726.4619.1564.6538.1523.9515.8510.6508.7
60°916.7692.0595.9549.9526.9513.3504.4497.6493.8
75°887.7673.2582.9540.0517.4502.7491.9477.6471.5
90°913.2687.1589.5541.5515.7499.8486.8467.8454.6
110°964.5703.9585.2530.2502.6483.7468.9450.5438.5
120°1001.8726.2598.4536.0504.8483.1465.6437.6419.3
135°1112.0798.1646.6561.3519.5494.0473.3439.1408.2
150°1332.4929.0731.1618.4551.7516.6493.3456.4425.1
Run VMG1541.71072.7843.3712.2625.0570.2534.2489.1456.2
Selected Courses
Windward / Leeward1517.51087.9882.0765.3693.1652.4627.0598.5584.7
All purpose1158.8844.5697.8618.9574.2548.9532.1511.0498.4
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward726.70.8257
All purpose596.61.0057
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7284
Downwind "popa"0.8666
70% up, 30% down "Ilhabela"0.7650
30% up, 70% down "Ilhabela-inverso"0.8199
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Predominantly Upwind642.80.9334
Predominantly Downwind608.10.9867
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low771.20.7780
Triple Number AP Medium593.11.0116
Triple Number AP High528.41.1355
Triple Number Windward/Leeward Low1026.80.5844
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Single Number Predominant Upwind667.00.8996
Single Number Predominant Reaching597.21.0047
Single Number Predominant Downwind634.70.9453
Predominant Upwind - Low919.30.6527
Predominant Upwind - Low/Med707.90.8475
Predominant Upwind - Medium621.30.9657
Predominant Upwind - Med/High576.51.0408
Predominant Upwind - High559.31.0729
Predominant Downwind Low931.60.6440
Predominant Downwind Low/Med690.30.8692
Predominant Downwind Medium585.11.0254
Predominant Downwind Med/High522.51.1483
Predominant Downwind High490.11.2243
Predominant Reaching Low828.10.7245
Predominant Reaching Low/Med636.10.9432
Predominant Reaching Medium557.61.0761
Predominant Reaching Med/High512.91.1698
Predominant Reaching High489.41.2259
SA/DSPL Upwind21.08SA/DSPL Downwind34.19
Scoring OptionTODTOT
5-Band Windward/Leeward Low1144.40.5243
5-Band Windward/Leeward Low/Med843.30.7115
5-Band Windward/Leeward Medium708.60.8467
5-Band Windward/Leeward Med/High632.00.9493
5-Band Windward/Leeward High601.00.9983
Windward/Leeward 60-40 Low1146.70.5232
Windward/Leeward 60-40 Low/Med852.30.7040
Windward/Leeward 60-40 Medium722.10.8309
Windward/Leeward 60-40 Med/High650.40.9225
Windward/Leeward 60-40 High623.00.9631
5-Band AP Low851.90.7043
5-Band AP Low/Med673.40.8911
5-Band AP Medium584.21.0270
5-Band AP Med/High534.91.1217
5-Band AP High512.51.1708
5-Band SF Bay Tour - Low990.60.6057
5-Band SF Bay Tour - Low/Med807.70.7428
5-Band SF Bay Tour - Medium685.70.8750
5-Band SF Bay Tour - Med/High618.70.9698
5-Band SF Bay Tour - High591.11.0151
Chicago-Mac Upwind0.8705
Chicago-Mac All Purpose0.8931
Chicago-Mac Downwind0.9107
Bayview-Mac Cove Island0.6562
Bayview-Mac Shore0.6610
Harvest Moon Regatta523.51.1460
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance648.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating648.00.9259
FinRating, kevyt tuuli1125.10.8888
FinRating, kova tuuli516.70.9676
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9259
Triple Number Coastal/Long Distance Low0.7780
Triple Number Coastal/Long Distance Medium1.0117
Triple Number Coastal/Long Distance High1.1355
Triple Number Windward/Leeward Low0.6092
Triple Number Windward/Leeward Medium0.8302
Triple Number Windward/Leeward High0.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
For information
General Purpose Handicap (GPH)670.4
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low771.2
Triple Number Coastal/Long Distance Medium593.1
Triple Number Coastal/Long Distance High528.4
Triple Number Windward/Leeward Low984.9
Triple Number Windward/Leeward Medium722.7
Triple Number Windward/Leeward High622.7
Predominantly Upwind642.8
Predominantly Downwind608.1
Predominantly Reaching585.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7780
Triple Number Coastal/Long Distance Medium1.0117
Triple Number Coastal/Long Distance High1.1355
Triple Number Windward/Leeward Low0.6092
Triple Number Windward/Leeward Medium0.8302
Triple Number Windward/Leeward High0.9636
Coastal/Long Distance0.9259
Predominantly Upwind0.9334
Predominantly Downwind0.9867
For information
General Purpose Handicap (GPH)670.4
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0057
Distanseseilas Trippeltall svak vind0.7780
Distanseseilas Trippeltall mellomvind1.0117
Distanseseilas Trippeltall sterk vind1.1355
Pølsebane Trippeltall svak vind0.6092
Pølsebane Trippeltall mellomvind0.8302
Pølsebane Trippeltall sterk vind0.9636
Motvind Singeltall0.9334
Medvind Singeltall0.9867
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Coastal/Long Distance648.00.9259
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind642.80.9334
Predominantly Downwind608.10.9867
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore588.81.0190
Cape Doctor Coastal502.21.1947
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7780
Triple Number Coastal/Long Distance Medium1.0117
Triple Number Coastal/Long Distance High1.1355
Triple Number Windward/Leeward Low0.6092
Triple Number Windward/Leeward Medium0.8302
Triple Number Windward/Leeward High0.9636
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7780
Triple Number Coastal/Long Distance Medium1.0117
Triple Number Coastal/Long Distance High1.1355
Triple Number Windward/Leeward Low0.6092
Triple Number Windward/Leeward Medium0.8302
Triple Number Windward/Leeward High0.9636
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Predominantly Upwind642.80.9334
Predominantly Downwind608.10.9867
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance648.00.9259
Triple Number Coastal/Long Distance Low771.20.7780
Triple Number Coastal/Long Distance Medium593.11.0117
Triple Number Coastal/Long Distance High528.41.1355
Triple Number Windward/Leeward Low984.90.6092
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1607.61086.4831.4693.4611.2569.2538.4492.7478.6
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low771.20.7780
Triple Number AP Medium593.11.0116
Triple Number AP High528.41.1355
Triple Number Windward/Leeward Low1026.80.5844
Triple Number Windward/Leeward Medium722.70.8302
Triple Number Windward/Leeward High622.70.9636
Single Number Predominant Upwind667.00.8996
Single Number Predominant Reaching597.21.0047
Single Number Predominant Downwind634.70.9453
Predominant Upwind - Low919.30.6527
Predominant Upwind - Low/Med707.90.8475
Predominant Upwind - Medium621.30.9657
Predominant Upwind - Med/High576.51.0408
Predominant Upwind - High559.31.0729
Predominant Downwind Low931.60.6440
Predominant Downwind Low/Med690.30.8692
Predominant Downwind Medium585.11.0254
Predominant Downwind Med/High522.51.1483
Predominant Downwind High490.11.2243
Predominant Reaching Low828.10.7245
Predominant Reaching Low/Med636.10.9432
Predominant Reaching Medium557.61.0761
Predominant Reaching Med/High512.91.1698
Predominant Reaching High489.41.2259
SA/DSPL Upwind21.08SA/DSPL Downwind34.19
Scoring OptionTODTOT
5-Band Windward/Leeward Low1144.40.5243
5-Band Windward/Leeward Low/Med843.30.7115
5-Band Windward/Leeward Medium708.60.8467
5-Band Windward/Leeward Med/High632.00.9493
5-Band Windward/Leeward High601.00.9983
Windward/Leeward 60-40 Low1146.70.5232
Windward/Leeward 60-40 Low/Med852.30.7040
Windward/Leeward 60-40 Medium722.10.8309
Windward/Leeward 60-40 Med/High650.40.9225
Windward/Leeward 60-40 High623.00.9631
5-Band AP Low851.90.7043
5-Band AP Low/Med673.40.8911
5-Band AP Medium584.21.0270
5-Band AP Med/High534.91.1217
5-Band AP High512.51.1708
5-Band SF Bay Tour - Low990.60.6057
5-Band SF Bay Tour - Low/Med807.70.7428
5-Band SF Bay Tour - Medium685.70.8750
5-Band SF Bay Tour - Med/High618.70.9698
5-Band SF Bay Tour - High591.11.0151
Chicago-Mac Upwind0.8705
Chicago-Mac All Purpose0.8931
Chicago-Mac Downwind0.9107
Bayview-Mac Cove Island0.6562
Bayview-Mac Shore0.6610
Harvest Moon Regatta523.51.1460
Club Certificate2025
BANDERSNATCH OF HOWTHIR2848
ORC
Central Rating Office
Issuing certificates for
Ireland
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassSWAN 37Measurement03/02/1973HIN37-027Plan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA11.079Max. Beam3.268Draft1.871Displacement6,924Wetted area26.04IMS L8.875LSM08.666Acc. length10.621Sink (kg/mm) 17.76
VCGD-0.300VCGM-0.279RM Rated (kg·m) 155.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight561Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.412PBW0.095PIPA0.0029
PSD0.030PHD0.053PHL0.083
PSA10.0°ESL0.839
ST10.022ST20.107ST30.153
ST40.057ST50.165
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0Checkstays0Spreaders1Rotating mastNo
P12.345IG14.113ISP14.113MDT10.138MDL10.225MDT2MDL2TLTaperMWGO
E3.567J4.771BAS1.372FSDFoilSFJSPL4.882WPLTPSBD0.116MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.300Flotation Date06/09/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
BANDERSNATCH OF HOWTHIR2848
ORC
Central Rating Office
Issuing certificates for
Ireland
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.140.901.301.992.6024.18* Copied from legacy *
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC7.1414.55NoNo 52.88* Copied from legacy *
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC14.1214.1214.128.578.57100.84* Copied from legacy *
CRUISER/RACER REQUIREMENTS*
Accommodation length10.6 mTable area0.44 m²Headroom1.74 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity92 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity62 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.