Club Certificate2026
ISLA SIRENA IIESP-5443_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 Angles47.1°43.9°41.5°40.7°40.4°39.8°39.6°39.6°40.3°
Beat VMG2.483.494.184.614.844.965.025.075.01
52°3.925.336.226.767.027.147.207.277.27
60°4.255.626.496.987.237.357.427.507.52
75°4.505.826.677.157.427.587.697.837.91
90°4.395.746.647.177.507.707.878.138.31
110°4.025.596.707.337.707.988.248.588.83
120°3.885.446.557.247.647.968.278.879.23
135°3.374.876.006.867.387.748.068.749.42
150°2.784.105.206.116.827.307.628.178.79
Run VMG2.413.554.505.295.916.396.817.508.00
Gybe Angles139.0°143.1°147.6°148.9°151.0°156.1°161.3°174.8°174.8°
APH ToD:567.9CDL: 9.248APH ToT: 1.0565CertNo:544301
BOAT
ClassDUFOUR 41 CLDesignerJ&J DESIGNBuilderDUFOURAge date11/1998Series date01/1995Offset fileDUF_41C.OFFData fileE5443_C
HULL
Length Overall11.950 mMaximum Beam3.976 mDraft2.026 mDisplacement9,350 kgDLR8.0438IMS DivisionCruiser/RacerDynamic Allowance0.360%Age Allowance0.650%RS Assessment-0.127%
PROPELLER
InstallationStrutTypeSolid 2 bladesDiameter0.300m
CREW
Maximum weight350 kg(declared)Minimum weight220 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail41.2542.13Headsail Luffed54.2654.26Headsail FlyingSymmetricAsymmetric117.55103.44 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS Maximum (m²)
Trysail11.77Storm Jib12.49Heavy Weather Jib33.71
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
✱ Asymmetric SHALL NOT be tacked on the pole
STABILITY
Righting Moment 190.0 kg·m Stability Index 109.1
COMMENTS
MEDIDAS ESTIMADAS.
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  03510004W4I Issued on 06/08/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
ISLA SIRENA IIESP-5443_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 VMG1453.71031.7861.2780.6744.1726.4717.4710.6718.6
52°917.4675.0578.4532.4512.6504.5499.9494.9494.9
60°846.8640.9555.1515.6497.7489.9485.5479.8478.6
75°799.9618.5539.5503.2485.1474.7468.4459.9455.0
90°820.3627.2542.3501.9479.7467.3457.3443.0433.5
110°894.8644.0537.6491.2467.8451.1436.9419.6407.5
120°926.7662.0549.8497.5471.3452.5435.5405.9390.0
135°1067.0739.5600.0525.1487.7465.3446.9411.7382.1
150°1293.0878.8692.6589.6527.6493.4472.5440.6409.3
Run VMG1493.01014.7799.8680.8608.7563.0529.0480.2449.9
Selected Courses
Windward / Leeward1473.41023.2830.5730.7676.4644.7623.2595.4584.3
All purpose1103.3786.0651.2583.9549.0528.7514.8496.0485.5
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward704.30.8519
All purpose567.91.0565
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.7538
Downwind "popa"0.8982
70% up, 30% down "Ilhabela"0.7920
30% up, 70% down "Ilhabela-inverso"0.8493
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Predominantly Upwind613.10.9787
Predominantly Downwind577.61.0387
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP592.31.0129 Predom. Rc High469.11.2789 5B SF Bay L/M762.10.7873 TriNum AP Low718.60.8350 Predom. Dn Low877.10.6840 5B SF Bay Med663.20.9047 TriNum AP Med564.11.0636 Predom. Dn L/M649.30.9241 5B SF Bay M/H609.30.9847 TriNum AP High511.21.1736 Predom. Dn Med558.01.0753 5B SF Bay High584.91.0258 TriNum W/L Low971.50.6176 Predom. Dn M/H504.21.1899 5B AP Low795.80.7539 TriNum W/L Med699.50.8578 Predom. Dn High473.11.2681 5B AP L/M632.20.9490 TriNum W/L Hig618.20.9706 ChiMac Up Low763.10.7862 5B AP Med557.01.0771 Predom. Upwind637.50.9412 ChiMac Up Med693.00.8658 5B AP M/H516.91.1609 Predom. Reaching563.21.0653 ChiMac Up High611.90.9805 5B AP High497.41.2062 Predom. Downwind604.20.9930 ChiMac Off Low755.70.7939 5B W/L Low1087.60.5517 Predom. Up Low863.20.6951 ChiMac Off Med669.60.8960 5B W/L L/M801.00.7491 Predom. Up L/M665.80.9012 ChiMac Off High568.51.0554 5B W/L Med688.50.8714 Predom. Up Med595.01.0084 ChiMac AP Low755.50.7942 5B W/L M/H626.60.9575 Predom. Up M/H561.41.0688 ChiMac AP Med678.50.8843 5B W/L High598.31.0029 Predom. Up High547.41.0961 ChiMac AP High588.51.0196 W/L 60-40 Low1089.00.5510 Predom. Rc Low770.90.7783 BayMac Cove Island869.70.6899 W/L 60-40 L/M808.90.7418 Predom. Rc L/M593.81.0105 BayMac Shore861.90.6961 W/L 60-40 Med701.80.8550 Predom. Rc Med526.71.1392 Harvest Moon500.71.1984 W/L 60-40 M/H645.30.9298 Predom. Rc M/H489.91.2247 5B SF Bay Low914.50.6561 W/L 60-40 High621.20.9658      SA/DSPL Up21.36SA/DSPL Dn35.51
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance618.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating618.90.9695
FinRating, kevyt tuuli1069.90.9347
FinRating, kova tuuli500.80.9985
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.9695
Triple Number Coastal/Long Distance Low0.8350
Triple Number Coastal/Long Distance Medium1.0637
Triple Number Coastal/Long Distance High1.1736
Triple Number Windward/Leeward Low0.6474
Triple Number Windward/Leeward Medium0.8578
Triple Number Windward/Leeward High0.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
For information
General Purpose Handicap (GPH)634.8
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Saronikos S All Purpose647.50.9267
Saronikos S Upwind719.00.8345
Saronikos S Downwind558.81.0738
Saronikos N All Purpose675.20.8886
Saronikos N Upwind748.00.8021
Saronikos N Downwind601.10.9982
Saronikos SW All Purpose648.90.9247
Saronikos SW Upwind734.30.8171
Saronikos SW Downwind562.01.0677
Saronikos NE All Purpose697.30.8605
Saronikos NE Upwind699.40.8579
Saronikos NE Downwind673.30.8911
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose592.31.0129
5-Band All Purpose Low865.50.6933
5-Band All Purpose L/M655.50.9153
5-Band All Purpose Med575.41.0428
5-Band All Purpose M/H532.01.1278
5-Band All Purpose High509.71.1771
Single Number Predominant Upwind611.80.9808
Single Number Predominant Reaching541.91.1071
Single Number Predominant Downwind578.41.0374
5-Band 50-50 Windward/Leeward Low1087.60.5517
5-Band 50-50 Windward/Leeward L/M801.00.7491
5-Band 50-50 Windward/Leeward Med688.50.8714
5-Band 50-50 Windward/Leeward M/H626.60.9575
5-Band 50-50 Windward/Leeward High598.31.0029
5-Band 60-40 Windward/Leeward Low1089.00.5510
5-Band 60-40 Windward/Leeward L/M808.90.7418
5-Band 60-40 Windward/Leeward Med701.80.8550
5-Band 60-40 Windward/Leeward M/H645.30.9298
5-Band 60-40 Windward/Leeward High621.20.9658
Triple Number 50-50 Windward/Leeward Low971.50.6176
Triple Number 50-50 Windward/Leeward Med699.50.8577
Triple Number 50-50 Windward/Leeward High618.10.9706
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward717.40.8364
Triple Number 60-40 Windward/Leeward Low975.00.6154
Triple Number 60-40 Windward/Leeward Med712.00.8428
Triple Number 60-40 Windward/Leeward High637.90.9405
Triple Number All-Purpose Low780.10.7691
Triple Number All-Purpose Med583.01.0292
Triple Number All-Purpose High525.61.1415
Triple Number Predominant Upwind Low789.40.7601
Triple Number Predominant Upwind Med603.80.9937
Triple Number Predominant Upwind High562.01.0676
Triple Number Predominant Reaching Low703.30.8531
Triple Number Predominant Reaching Med541.91.1072
Triple Number Predominant Reaching High474.81.2636
Triple Number Predominant Downwind Low783.70.7656
Triple Number Predominant Downwind Med568.01.0563
Triple Number Predominant Downwind High486.31.2337
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low718.6
Triple Number Coastal/Long Distance Medium564.1
Triple Number Coastal/Long Distance High511.2
Triple Number Windward/Leeward Low926.8
Triple Number Windward/Leeward Medium699.5
Triple Number Windward/Leeward High618.2
Predominantly Upwind613.1
Predominantly Downwind577.6
Predominantly Reaching551.8
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8350
Triple Number Coastal/Long Distance Medium1.0637
Triple Number Coastal/Long Distance High1.1736
Triple Number Windward/Leeward Low0.6474
Triple Number Windward/Leeward Medium0.8578
Triple Number Windward/Leeward High0.9706
Coastal/Long Distance0.9695
Predominantly Upwind0.9787
Predominantly Downwind1.0387
For information
General Purpose Handicap (GPH)634.8
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.0565
Distanseseilas Trippeltall svak vind0.8350
Distanseseilas Trippeltall mellomvind1.0637
Distanseseilas Trippeltall sterk vind1.1736
Pølsebane Trippeltall svak vind0.6474
Pølsebane Trippeltall mellomvind0.8578
Pølsebane Trippeltall sterk vind0.9706
Motvind Singeltall0.9787
Medvind Singeltall1.0387
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Coastal/Long Distance618.90.9695
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind613.10.9787
Predominantly Downwind577.61.0387
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore587.61.0211
Cape Doctor Coastal488.61.2279
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8350
Triple Number Coastal/Long Distance Medium1.0637
Triple Number Coastal/Long Distance High1.1736
Triple Number Windward/Leeward Low0.6474
Triple Number Windward/Leeward Medium0.8578
Triple Number Windward/Leeward High0.9706
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8350
Triple Number Coastal/Long Distance Medium1.0637
Triple Number Coastal/Long Distance High1.1736
Triple Number Windward/Leeward Low0.6474
Triple Number Windward/Leeward Medium0.8578
Triple Number Windward/Leeward High0.9706
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Predominantly Upwind613.10.9787
Predominantly Downwind577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance618.90.9695
Triple Number Coastal/Long Distance Low718.60.8350
Triple Number Coastal/Long Distance Medium564.11.0637
Triple Number Coastal/Long Distance High511.21.1736
Triple Number Windward/Leeward Low926.80.6474
Triple Number Windward/Leeward Medium699.50.8578
Triple Number Windward/Leeward High618.20.9706
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1475.31022.3781.4658.4587.0549.3520.0473.1461.6
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP592.31.0129 Predom. Dn High473.11.2681 5B AP M/H516.91.1609 TriNum AP Low718.60.8350 Predom. Rc Low770.90.7783 5B AP High497.41.2062 TriNum AP Med564.11.0636 Predom. Rc L/M593.81.0105 5B SF Bay Low914.50.6561 TriNum AP High511.21.1736 Predom. Rc Med526.71.1392 5B SF Bay L/M762.10.7873 TriNum W/L Low971.50.6176 Predom. Rc M/H489.91.2247 5B SF Bay Med663.20.9047 TriNum W/L Med699.50.8578 Predom. Rc High469.11.2789 5B SF Bay M/H609.30.9847 TriNum W/L Hig618.20.9706 5B W/L Low1087.60.5517 5B SF Bay High584.91.0258 Predom. Upwind637.50.9412 5B W/L L/M801.00.7491 ChiMac Up Low763.10.7862 Predom. Reaching563.21.0653 5B W/L Med688.50.8714 ChiMac Up Med693.00.8658 Predom. Downwind604.20.9930 5B W/L M/H626.60.9575 ChiMac Up High611.90.9805 Predom. Up Low863.20.6951 5B W/L High598.31.0029 ChiMac Off Low755.70.7939 Predom. Up L/M665.80.9012 W/L 60-40 Low1089.00.5510 ChiMac Off Med669.60.8960 Predom. Up Med595.01.0084 W/L 60-40 L/M808.90.7418 ChiMac Off High568.51.0554 Predom. Up M/H561.41.0688 W/L 60-40 Med701.80.8550 ChiMac AP Low755.50.7942 Predom. Up High547.41.0961 W/L 60-40 M/H645.30.9298 ChiMac AP Med678.50.8843 Predom. Dn Low877.10.6840 W/L 60-40 High621.20.9658 ChiMac AP High588.51.0196 Predom. Dn L/M649.30.9241 5B AP Low795.80.7539 BayMac Cove Island869.70.6899 Predom. Dn Med558.01.0753 5B AP L/M632.20.9490 BayMac Shore861.90.6961 Predom. Dn M/H504.21.1899 5B AP Med557.01.0771 Harvest Moon500.71.1984      SA/DSPL Up21.36SA/DSPL Dn35.51
ORC Ref  03510004W4I Issued on 06/08/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
ISLA SIRENA IIESP-5443_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDUFOUR 41 CLMeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
Length overall11.950Maximum beam3.976Draft2.026Displacement9,350Wetted area32.09IMS L10.443LSM010.513Accomod. length11.950Sink (kg/mm) 24.59
VCGD0.275VCGM0.233 RM Rated (kg·m) 190.0Limit of positive stability(°) 104.4 Stability Index 109.1 BLR index 0.0000Default crew weight739 Declared crew weight 350
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeSolid 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.300PBWPIPA0.0101
EDL3.000ST10.070ST20.170
ST30.190ST40.096ST50.320
RIG
BackstayAdjustableForestayFixedInner forestayNot installedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders2Rotating mastNo
P14.300IG15.800ISP15.900MDT10.100MDL10.110MDT2MDL2TLMWGO
E4.700J4.400BAS1.800FSD0.040SFJSPL5.000WPLTPS4.500BDMWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered190.0Flotation Date01/08/2020
SFFP1.000FFMFF1.344LCFcl6.720SG
SAFP10.516FAMFA1.068LCFsh7.010HBI1.200
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03510004W4I Issued on 06/08/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
ISLA SIRENA IIESP-5443_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00141.25
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment0016.50NoNo 54.26
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment00215.68NaN117.55
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
CRUISER/RACER REQUIREMENTS*
Accommodation length11.9 mTable area0.55 m²Headroom1.81 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity148 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity88 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.
ORC Ref  03510004W4I Issued on 06/08/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org