Club Certificate2025
MAUIESP-11395_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
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 Angles44.5°44.5°42.9°41.6°40.8°39.7°38.9°38.7°39.7°
Beat VMG1.882.623.223.653.984.244.404.494.41
52°2.954.044.875.445.826.056.206.316.30
60°3.164.285.105.665.996.206.356.486.50
75°3.284.435.265.836.156.356.506.726.83
90°3.254.495.456.056.356.546.646.827.06
110°3.324.575.536.126.446.686.907.307.52
120°3.184.415.386.046.406.666.907.407.88
135°2.844.004.995.756.226.526.777.297.90
150°2.393.474.465.265.886.276.547.027.56
Run VMG2.073.013.874.595.235.746.136.647.08
Gybe Angles148.4°148.4°151.9°155.9°161.2°167.3°176.8°178.8°178.2°
APH ToD:679.9CDL: 6.548APH ToT: 0.8825CertNo:1139501
BOAT
ClassDUFOUR 31DesignerM. DUFOURBuilderTAYLORAge date02/1978Series date01/1975Offset fileE120.OFFData fileE11395_C
HULL
Length Overall9.320 mMaximum Beam3.288 mDraft1.819 mDisplacement5,098 kgDLR12.4734IMS DivisionCruiser/RacerDynamic Allowance0.720%Age Allowance0.487%
PROPELLER
InstallationShaft non exposedTypeSolid 3 bladesDiameter0.380m
CREW
Maximum weight480 kg(declared)Minimum weight350 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail18.2318.48Headsail Luffed24.7824.78Headsail FlyingSymmetric57.3757.38Asymmetric
STORM SAIL AREAS (m²)
Trysail5.43Storm Jib6.85Heavy Weather Jib18.49
SAIL LIMITS
Headsails5
✱ One set on the forestay
✱ Woven polyester sails
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
MAUIESP-11395_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
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 VMG1918.91373.21116.3985.2903.5849.7818.9802.7816.2
52°1219.6890.6738.9661.4618.8594.9580.9570.5571.3
60°1139.6841.4705.9635.9600.5580.3567.4555.2553.9
75°1097.5813.3684.5617.4585.6566.9553.6535.7526.9
90°1108.5801.8660.4595.4566.6550.8542.0527.7510.0
110°1085.2787.8651.2588.2558.6538.6521.7493.4478.5
120°1130.4816.4669.4596.3562.1540.5521.8486.4456.9
135°1267.0899.5722.0625.9578.7552.2531.9493.6455.9
150°1504.31036.1807.8684.7611.9573.7550.2513.2476.3
Run VMG1738.61196.3931.1784.1688.6626.7587.2542.2508.8
Selected Courses
Windward / Leeward1827.71284.81023.7884.7796.0738.2703.1672.4662.5
All purpose1390.6993.7805.5708.1652.8618.9597.5573.3560.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward833.90.7195
All purpose679.90.8825
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6132
Downwind "popa"0.7841
70% up, 30% down "Ilhabela"0.6561
30% up, 70% down "Ilhabela-inverso"0.7236
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Predominantly Upwind742.20.8084
Predominantly Downwind683.20.8782
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low899.60.6670
Triple Number AP Medium675.50.8882
Triple Number AP High593.71.0105
Triple Number Windward/Leeward Low1207.80.4968
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Single Number Predominant Upwind775.50.7737
Single Number Predominant Reaching678.50.8844
Single Number Predominant Downwind716.00.8380
Predominant Upwind - Low1112.30.5394
Predominant Upwind - Low/Med831.50.7216
Predominant Upwind - Medium715.30.8388
Predominant Upwind - Med/High651.60.9208
Predominant Upwind - High630.00.9523
Predominant Downwind Low1071.90.5597
Predominant Downwind Low/Med779.60.7696
Predominant Downwind Medium655.30.9156
Predominant Downwind Med/High583.51.0282
Predominant Downwind High548.71.0936
Predominant Reaching Low970.70.6181
Predominant Reaching Low/Med724.60.8281
Predominant Reaching Medium626.60.9575
Predominant Reaching Med/High574.71.0441
Predominant Reaching High549.71.0914
SA/DSPL Upwind14.44SA/DSPL Downwind25.38
Scoring OptionTODTOT
5-Band Windward/Leeward Low1355.50.4426
5-Band Windward/Leeward Low/Med979.50.6125
5-Band Windward/Leeward Medium812.30.7386
5-Band Windward/Leeward Med/High711.70.8431
5-Band Windward/Leeward High676.00.8875
Windward/Leeward 60-40 Low1373.50.4368
Windward/Leeward 60-40 Low/Med998.90.6006
Windward/Leeward 60-40 Medium833.60.7198
Windward/Leeward 60-40 Med/High735.00.8163
Windward/Leeward 60-40 High702.40.8542
5-Band AP Low995.30.6028
5-Band AP Low/Med776.30.7729
5-Band AP Medium664.40.9031
5-Band AP Med/High601.70.9972
5-Band AP High575.21.0432
5-Band SF Bay Tour - Low1170.60.5125
5-Band SF Bay Tour - Low/Med941.50.6373
5-Band SF Bay Tour - Medium788.50.7610
5-Band SF Bay Tour - Med/High698.70.8587
5-Band SF Bay Tour - High666.00.9008
Chicago-Mac Upwind0.7451
Chicago-Mac All Purpose0.7780
Chicago-Mac Downwind0.8068
Bayview-Mac Cove Island0.5577
Bayview-Mac Shore0.5611
Harvest Moon Regatta587.91.0206
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance739.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating739.90.8109
FinRating, kevyt tuuli1331.50.7511
FinRating, kova tuuli579.80.8623
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8109
Triple Number Coastal/Long Distance Low0.6670
Triple Number Coastal/Long Distance Medium0.8883
Triple Number Coastal/Long Distance High1.0105
Triple Number Windward/Leeward Low0.5198
Triple Number Windward/Leeward Medium0.7228
Triple Number Windward/Leeward High0.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
For information
General Purpose Handicap (GPH)768.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low899.6
Triple Number Coastal/Long Distance Medium675.4
Triple Number Coastal/Long Distance High593.8
Triple Number Windward/Leeward Low1154.3
Triple Number Windward/Leeward Medium830.1
Triple Number Windward/Leeward High700.4
Predominantly Upwind742.2
Predominantly Downwind683.2
Predominantly Reaching658.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6670
Triple Number Coastal/Long Distance Medium0.8883
Triple Number Coastal/Long Distance High1.0105
Triple Number Windward/Leeward Low0.5198
Triple Number Windward/Leeward Medium0.7228
Triple Number Windward/Leeward High0.8567
Coastal/Long Distance0.8109
Predominantly Upwind0.8084
Predominantly Downwind0.8782
For information
General Purpose Handicap (GPH)768.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.8825
Distanseseilas Trippeltall svak vind0.6670
Distanseseilas Trippeltall mellomvind0.8883
Distanseseilas Trippeltall sterk vind1.0105
Pølsebane Trippeltall svak vind0.5198
Pølsebane Trippeltall mellomvind0.7228
Pølsebane Trippeltall sterk vind0.8567
Motvind Singeltall0.8084
Medvind Singeltall0.8782
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Coastal/Long Distance739.90.8109
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind742.20.8084
Predominantly Downwind683.20.8782
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore665.50.9016
Cape Doctor Coastal564.11.0637
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6670
Triple Number Coastal/Long Distance Medium0.8883
Triple Number Coastal/Long Distance High1.0105
Triple Number Windward/Leeward Low0.5198
Triple Number Windward/Leeward Medium0.7228
Triple Number Windward/Leeward High0.8567
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6670
Triple Number Coastal/Long Distance Medium0.8883
Triple Number Coastal/Long Distance High1.0105
Triple Number Windward/Leeward Low0.5198
Triple Number Windward/Leeward Medium0.7228
Triple Number Windward/Leeward High0.8567
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Predominantly Upwind742.20.8084
Predominantly Downwind683.20.8782
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance739.90.8109
Triple Number Coastal/Long Distance Low899.60.6670
Triple Number Coastal/Long Distance Medium675.40.8883
Triple Number Coastal/Long Distance High593.81.0105
Triple Number Windward/Leeward Low1154.30.5198
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1924.41275.9961.2796.8697.2641.8604.2551.8534.8
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low899.60.6670
Triple Number AP Medium675.50.8882
Triple Number AP High593.71.0105
Triple Number Windward/Leeward Low1207.80.4968
Triple Number Windward/Leeward Medium830.10.7228
Triple Number Windward/Leeward High700.40.8567
Single Number Predominant Upwind775.50.7737
Single Number Predominant Reaching678.50.8844
Single Number Predominant Downwind716.00.8380
Predominant Upwind - Low1112.30.5394
Predominant Upwind - Low/Med831.50.7216
Predominant Upwind - Medium715.30.8388
Predominant Upwind - Med/High651.60.9208
Predominant Upwind - High630.00.9523
Predominant Downwind Low1071.90.5597
Predominant Downwind Low/Med779.60.7696
Predominant Downwind Medium655.30.9156
Predominant Downwind Med/High583.51.0282
Predominant Downwind High548.71.0936
Predominant Reaching Low970.70.6181
Predominant Reaching Low/Med724.60.8281
Predominant Reaching Medium626.60.9575
Predominant Reaching Med/High574.71.0441
Predominant Reaching High549.71.0914
SA/DSPL Upwind14.44SA/DSPL Downwind25.38
Scoring OptionTODTOT
5-Band Windward/Leeward Low1355.50.4426
5-Band Windward/Leeward Low/Med979.50.6125
5-Band Windward/Leeward Medium812.30.7386
5-Band Windward/Leeward Med/High711.70.8431
5-Band Windward/Leeward High676.00.8875
Windward/Leeward 60-40 Low1373.50.4368
Windward/Leeward 60-40 Low/Med998.90.6006
Windward/Leeward 60-40 Medium833.60.7198
Windward/Leeward 60-40 Med/High735.00.8163
Windward/Leeward 60-40 High702.40.8542
5-Band AP Low995.30.6028
5-Band AP Low/Med776.30.7729
5-Band AP Medium664.40.9031
5-Band AP Med/High601.70.9972
5-Band AP High575.21.0432
5-Band SF Bay Tour - Low1170.60.5125
5-Band SF Bay Tour - Low/Med941.50.6373
5-Band SF Bay Tour - Medium788.50.7610
5-Band SF Bay Tour - Med/High698.70.8587
5-Band SF Bay Tour - High666.00.9008
Chicago-Mac Upwind0.7451
Chicago-Mac All Purpose0.7780
Chicago-Mac Downwind0.8068
Bayview-Mac Cove Island0.5577
Bayview-Mac Shore0.5611
Harvest Moon Regatta587.91.0206
Club Certificate2025
MAUIESP-11395_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDUFOUR 31MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.320Max. Beam3.288Draft1.819Displacement5,098Wetted area20.41IMS L7.633LSM07.420Acc. length9.320Sink (kg/mm) 14.24
VCGD-0.092VCGM-0.001RM Rated (kg·m) 78.7Limit of positive stability(°) N/AStability IndexN/ADefault crew weight450Declared crew weight480
PROPELLER
Propeller TypeSolid 3 blades
InstallationShaft non exposedTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0087
PSD0.025PHD0.075PHL0.125
PSA10.0°ESL0.080
RIG
Forestay tensionFixedInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P10.090IG11.700ISP11.900MDT10.100MDL10.110MDT2MDL2TLMWGO
E3.070J3.610BAS1.400FSD0.050SFJSPL3.750WPLTPSBD0.116MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered80.0Flotation Date01/01/2010
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
MAUIESP-11395_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM0.100.611.121.952.5718.2307/08/2025
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentG0.050.531.042.153.334.5411.22NoNo 24.7807/08/2025
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS10.2010.2010.206.756.7557.37
CRUISER/RACER REQUIREMENTS*
Accommodation length9.3 mTable area0.44 m²Headroom1.65 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity66 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity36 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.