Club Certificate2026
UNDERWOODESP-5122_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 Angles46.8°44.5°42.3°41.1°40.4°39.8°39.5°39.5°40.8°
Beat VMG1.872.723.313.734.044.244.354.394.28
52°2.964.184.975.525.876.076.196.266.23
60°3.194.425.205.736.046.236.356.456.45
75°3.354.565.375.896.196.396.536.736.81
90°3.244.495.436.036.346.536.626.907.15
110°3.254.575.536.126.456.716.947.347.53
120°3.114.415.386.046.426.696.967.497.82
135°2.754.014.995.756.246.556.827.427.89
150°2.333.484.465.265.896.296.577.117.66
Run VMG2.023.013.874.595.235.756.146.677.18
Gybe Angles145.3°148.4°151.9°156.1°161.2°167.1°176.3°178.6°177.7°
APH ToD:675.6CDL: 6.604APH ToT: 0.8882CertNo:512201
BOAT
ClassDUFOUR 31DesignerM. DUFOURBuilderTAYLORAge date02/1978Series date01/1975Offset fileE120.OFFData fileE5122_C
HULL
Length Overall9.320 mMaximum Beam3.288 mDraft1.819 mDisplacement5,098 kgDLR12.4735IMS DivisionCruiser/RacerDynamic Allowance0.710%Age Allowance0.650%RS Assessment0.000%
PROPELLER
InstallationShaft non exposedTypeSolid 3 bladesDiameter0.380m
CREW
Maximum weight350 kg(declared)Minimum weight220 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail18.2618.57Headsail Luffed27.9827.98Headsail FlyingSymmetric57.4057.40Asymmetric
STORM SAIL AREAS Maximum (m²)
Trysail5.26Storm Jib6.85Heavy Weather Jib18.49
SAIL LIMITS
Headsails5
✱ One set on the forestay
✱ Woven polyester sails
Spinnakers4
STABILITY
Righting Moment 78.7 kg·m Stability Index 122.3
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.
ORC Ref  03510004RVA Issued on 03/06/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
UNDERWOODESP-5122_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 VMG1921.11325.51086.6965.0891.2848.9828.1820.8841.7
52°1215.7861.3724.2652.2613.8593.0581.5575.0577.9
60°1128.0815.0691.9628.4596.1577.7566.8558.3558.2
75°1075.9789.0669.9610.8581.2563.4551.0534.9528.8
90°1110.7801.3663.1597.4567.6551.7543.9521.6503.7
110°1106.7787.0651.5588.4557.7536.8518.4490.5477.9
120°1158.8815.7669.0595.9561.0538.3517.5480.5460.5
135°1310.5898.6721.5625.6577.3550.0528.2485.4456.1
150°1544.31035.2807.4684.4611.6572.3547.9506.4470.2
Run VMG1783.11195.3930.7783.7688.3626.4586.1539.5501.5
Selected Courses
Windward / Leeward1852.11260.41008.7874.4789.7737.6707.1680.2671.6
All purpose1406.4977.0795.9702.0648.8617.5598.2574.8564.6
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward827.90.7247
All purpose675.60.8882
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.6207
Downwind "popa"0.7850
70% up, 30% down "Ilhabela"0.6623
30% up, 70% down "Ilhabela-inverso"0.7273
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Predominantly Upwind735.90.8153
Predominantly Downwind680.60.8815
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP703.10.8534 Predom. Rc High548.21.0945 5B SF Bay L/M925.10.6486 TriNum AP Low886.50.6768 Predom. Dn Low1074.40.5585 5B SF Bay Med782.50.7668 TriNum AP Med671.10.8941 Predom. Dn L/M775.90.7732 5B SF Bay M/H701.20.8557 TriNum AP High594.31.0097 Predom. Dn Med653.40.9182 5B SF Bay High672.90.8917 TriNum W/L Low1192.90.5030 Predom. Dn M/H582.51.0301 5B AP Low990.50.6058 TriNum W/L Med823.20.7289 Predom. Dn High546.81.0973 5B AP L/M767.80.7815 TriNum W/L Hig704.60.8515 ChiMac Up Low953.80.6290 5B AP Med660.50.9085 Predom. Upwind770.40.7788 ChiMac Up Med851.20.7049 5B AP M/H601.80.9971 Predom. Reaching676.90.8863 ChiMac Up High732.90.8187 5B AP High577.11.0398 Predom. Downwind715.10.8390 ChiMac Off Low913.50.6568 5B W/L Low1345.40.4460 Predom. Up Low1098.00.5464 ChiMac Off Med800.20.7498 5B W/L L/M966.10.6211 Predom. Up L/M818.60.7329 ChiMac Off High667.90.8983 5B W/L Med806.50.7440 Predom. Up Med709.80.8453 ChiMac AP Low929.30.6456 5B W/L M/H714.70.8396 Predom. Up M/H653.50.9181 ChiMac AP Med822.60.7294 5B W/L High683.30.8780 Predom. Up High635.60.9441 ChiMac AP High698.40.8591 W/L 60-40 Low1359.30.4414 Predom. Rc Low968.90.6193 BayMac Cove Island1073.70.5588 W/L 60-40 L/M982.90.6104 Predom. Rc L/M720.50.8327 BayMac Shore1065.90.5629 W/L 60-40 Med826.70.7258 Predom. Rc Med624.80.9603 Harvest Moon592.21.0131 W/L 60-40 M/H738.90.8121 Predom. Rc M/H574.21.0449 5B SF Bay Low1133.20.5295 W/L 60-40 High711.80.8429      SA/DSPL Up15.53SA/DSPL Dn25.40
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance734.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating734.70.8167
FinRating, kevyt tuuli1328.60.7527
FinRating, kova tuuli581.90.8593
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.8167
Triple Number Coastal/Long Distance Low0.6768
Triple Number Coastal/Long Distance Medium0.8942
Triple Number Coastal/Long Distance High1.0097
Triple Number Windward/Leeward Low0.5288
Triple Number Windward/Leeward Medium0.7289
Triple Number Windward/Leeward High0.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
For information
General Purpose Handicap (GPH)762.1
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Saronikos S All Purpose783.70.7656
Saronikos S Upwind892.60.6722
Saronikos S Downwind653.30.9184
Saronikos N All Purpose820.50.7313
Saronikos N Upwind932.10.6437
Saronikos N Downwind715.60.8385
Saronikos SW All Purpose796.20.7536
Saronikos SW Upwind922.90.6501
Saronikos SW Downwind668.60.8973
Saronikos NE All Purpose855.00.7018
Saronikos NE Upwind875.70.6851
Saronikos NE Downwind813.00.7380
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose703.10.8534
5-Band All Purpose Low1081.60.5547
5-Band All Purpose L/M794.70.7550
5-Band All Purpose Med680.10.8822
5-Band All Purpose M/H617.30.9720
5-Band All Purpose High590.71.0158
Single Number Predominant Upwind734.80.8165
Single Number Predominant Reaching647.10.9272
Single Number Predominant Downwind680.90.8811
5-Band 50-50 Windward/Leeward Low1345.40.4460
5-Band 50-50 Windward/Leeward L/M966.10.6211
5-Band 50-50 Windward/Leeward Med806.50.7440
5-Band 50-50 Windward/Leeward M/H714.70.8396
5-Band 50-50 Windward/Leeward High683.30.8780
5-Band 60-40 Windward/Leeward Low1359.30.4414
5-Band 60-40 Windward/Leeward L/M982.90.6104
5-Band 60-40 Windward/Leeward Med826.70.7258
5-Band 60-40 Windward/Leeward M/H738.90.8121
5-Band 60-40 Windward/Leeward High711.80.8429
Triple Number 50-50 Windward/Leeward Low1192.90.5030
Triple Number 50-50 Windward/Leeward Med823.30.7288
Triple Number 50-50 Windward/Leeward High704.60.8515
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward848.10.7074
Triple Number 60-40 Windward/Leeward Low1207.40.4969
Triple Number 60-40 Windward/Leeward Med843.00.7118
Triple Number 60-40 Windward/Leeward High729.80.8221
Triple Number All-Purpose Low965.50.6214
Triple Number All-Purpose Med691.50.8677
Triple Number All-Purpose High609.30.9848
Triple Number Predominant Upwind Low992.90.6043
Triple Number Predominant Upwind Med724.40.8283
Triple Number Predominant Upwind High653.70.9178
Triple Number Predominant Reaching Low873.50.6869
Triple Number Predominant Reaching Med644.80.9306
Triple Number Predominant Reaching High557.01.0772
Triple Number Predominant Downwind Low954.20.6288
Triple Number Predominant Downwind Med665.00.9023
Triple Number Predominant Downwind High561.11.0694
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low886.5
Triple Number Coastal/Long Distance Medium671.0
Triple Number Coastal/Long Distance High594.2
Triple Number Windward/Leeward Low1134.6
Triple Number Windward/Leeward Medium823.2
Triple Number Windward/Leeward High704.6
Predominantly Upwind735.9
Predominantly Downwind680.6
Predominantly Reaching656.2
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.6768
Triple Number Coastal/Long Distance Medium0.8942
Triple Number Coastal/Long Distance High1.0097
Triple Number Windward/Leeward Low0.5288
Triple Number Windward/Leeward Medium0.7289
Triple Number Windward/Leeward High0.8515
Coastal/Long Distance0.8167
Predominantly Upwind0.8153
Predominantly Downwind0.8815
For information
General Purpose Handicap (GPH)762.1
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)0.8882
Distanseseilas Trippeltall svak vind0.6768
Distanseseilas Trippeltall mellomvind0.8942
Distanseseilas Trippeltall sterk vind1.0097
Pølsebane Trippeltall svak vind0.5288
Pølsebane Trippeltall mellomvind0.7289
Pølsebane Trippeltall sterk vind0.8515
Motvind Singeltall0.8153
Medvind Singeltall0.8815
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Coastal/Long Distance734.70.8167
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind735.90.8153
Predominantly Downwind680.60.8815
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore674.20.8900
Cape Doctor Coastal567.61.0570
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.6768
Triple Number Coastal/Long Distance Medium0.8942
Triple Number Coastal/Long Distance High1.0097
Triple Number Windward/Leeward Low0.5288
Triple Number Windward/Leeward Medium0.7289
Triple Number Windward/Leeward High0.8515
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.6768
Triple Number Coastal/Long Distance Medium0.8942
Triple Number Coastal/Long Distance High1.0097
Triple Number Windward/Leeward Low0.5288
Triple Number Windward/Leeward Medium0.7289
Triple Number Windward/Leeward High0.8515
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Predominantly Upwind735.90.8153
Predominantly Downwind680.60.8815
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance734.70.8167
Triple Number Coastal/Long Distance Low886.50.6768
Triple Number Coastal/Long Distance Medium671.00.8942
Triple Number Coastal/Long Distance High594.21.0097
Triple Number Windward/Leeward Low1134.60.5288
Triple Number Windward/Leeward Medium823.20.7289
Triple Number Windward/Leeward High704.60.8515
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1845.21253.9948.5789.0692.7640.6604.8550.7536.7
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP703.10.8534 Predom. Dn High546.81.0973 5B AP M/H601.80.9971 TriNum AP Low886.50.6768 Predom. Rc Low968.90.6193 5B AP High577.11.0398 TriNum AP Med671.10.8941 Predom. Rc L/M720.50.8327 5B SF Bay Low1133.20.5295 TriNum AP High594.31.0097 Predom. Rc Med624.80.9603 5B SF Bay L/M925.10.6486 TriNum W/L Low1192.90.5030 Predom. Rc M/H574.21.0449 5B SF Bay Med782.50.7668 TriNum W/L Med823.20.7289 Predom. Rc High548.21.0945 5B SF Bay M/H701.20.8557 TriNum W/L Hig704.60.8515 5B W/L Low1345.40.4460 5B SF Bay High672.90.8917 Predom. Upwind770.40.7788 5B W/L L/M966.10.6211 ChiMac Up Low953.80.6290 Predom. Reaching676.90.8863 5B W/L Med806.50.7440 ChiMac Up Med851.20.7049 Predom. Downwind715.10.8390 5B W/L M/H714.70.8396 ChiMac Up High732.90.8187 Predom. Up Low1098.00.5464 5B W/L High683.30.8780 ChiMac Off Low913.50.6568 Predom. Up L/M818.60.7329 W/L 60-40 Low1359.30.4414 ChiMac Off Med800.20.7498 Predom. Up Med709.80.8453 W/L 60-40 L/M982.90.6104 ChiMac Off High667.90.8983 Predom. Up M/H653.50.9181 W/L 60-40 Med826.70.7258 ChiMac AP Low929.30.6456 Predom. Up High635.60.9441 W/L 60-40 M/H738.90.8121 ChiMac AP Med822.60.7294 Predom. Dn Low1074.40.5585 W/L 60-40 High711.80.8429 ChiMac AP High698.40.8591 Predom. Dn L/M775.90.7732 5B AP Low990.50.6058 BayMac Cove Island1073.70.5588 Predom. Dn Med653.40.9182 5B AP L/M767.80.7815 BayMac Shore1065.90.5629 Predom. Dn M/H582.51.0301 5B AP Med660.50.9085 Harvest Moon592.21.0131      SA/DSPL Up15.53SA/DSPL Dn25.40
ORC Ref  03510004RVA Issued on 03/06/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
UNDERWOODESP-5122_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
Length overall9.320Maximum beam3.288Draft1.819Displacement5,098Wetted area20.41IMS L7.593LSM07.420Accomod. length9.320Sink (kg/mm) 14.24
VCGD-0.092VCGM-0.001 RM Rated (kg·m) 78.7Limit of positive stability(°) 120.8 Stability Index 122.3 BLR index 0.0000Default crew weight450 Declared crew weight 350
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeSolid 3 blades
InstallationShaft non exposedTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0087
PSD0.025PHD0.075PHL0.125
PSA10.0°ESL0.080
RIG
BackstayFixedForestayFixedInner forestayNot installedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders1Rotating mastNo
P10.070IG11.700ISP11.900MDT10.100MDL10.110MDT2MDL2TLMWGO
E2.980J3.610BAS1.400FSD0.050SFJSPL3.700WPLTPSBD0.116MWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered80.0Flotation Date01/01/2010
SFFP0.760FFMFF1.229LCFcl5.393SG
SAFP8.895FAMFA0.917LCFsh5.640HBI1.093
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03510004RVA Issued on 03/06/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
UNDERWOODESP-5122_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment0020.080.661.221.992.5118.2601/04/2025
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment20.080.591.262.393.735.1311.22NoNo 27.9801/04/2025
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment111.2011.2011.206.205.9557.4001/03/2023
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
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.
ORC Ref  03510004RVA Issued on 03/06/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org