Club Certificate2025
JU DOSESP-10598_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 Angles43.6°43.6°41.3°40.1°39.6°39.3°39.1°39.3°40.5°
Beat VMG3.224.335.085.445.645.785.865.925.79
52°5.046.627.587.978.198.338.428.528.45
60°5.376.997.928.298.488.608.698.808.79
75°5.627.278.198.608.808.959.079.249.33
90°5.527.188.168.699.019.249.429.729.92
110°4.966.758.058.769.199.489.7410.0810.56
120°4.786.577.928.699.229.7010.0810.6911.11
135°4.235.917.278.248.859.379.9111.1712.65
150°3.474.926.207.298.168.749.2010.1711.44
Run VMG3.004.265.376.317.097.648.118.949.91
Gybe Angles141.1°141.1°144.7°148.9°151.9°154.7°159.9°161.9°146.2°
APH ToD:476.5CDL: 12.138APH ToT: 1.2591CertNo:105981
BOAT
ClassX-50 SDDesignerN. JEPPESENBuilderX YACHTSAge date05/2005Series date01/2004Offset fileX-50-SK.offData fileE10598_C
HULL
Length Overall15.220 mMaximum Beam4.290 mDraft2.365 mDisplacement12,622 kgDLR5.6634IMS DivisionCruiser/RacerDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.540m
CREW
Maximum weight500 kg(declared)Minimum weight370 kg ✱ when appliedNon Manual PowerYesCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail84.2786.28Headsail Luffed75.4675.46Headsail FlyingSymmetricAsymmetric171.98171.98 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail24.03Storm Jib20.83Heavy Weather Jib56.24
SAIL LIMITS
Headsails7
✱ One set on the forestay
Spinnakers5
STABILITY
Righting MomentN/AStability IndexN/A
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.
Club Certificate2025
JU DOSESP-10598_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 VMG1119.1831.6708.2661.8638.1623.3614.1607.9622.1
52°715.0543.8475.2451.5439.7432.3427.5422.6426.2
60°670.2514.7454.6434.4424.7418.4414.1409.2409.7
75°640.1495.0439.6418.5409.1402.2396.8389.8386.0
90°652.1501.3441.3414.5399.6389.7382.1370.5363.0
110°725.9533.2447.4410.9391.7379.9369.8357.1341.0
120°753.7547.9454.7414.1390.5371.3357.2336.8324.1
135°851.7609.6495.0436.8406.6384.1363.3322.2284.6
150°1037.9731.0580.8493.7441.1411.9391.2354.1314.6
Run VMG1198.6844.1670.7570.1508.1471.0443.7402.9363.2
Selected Courses
Windward / Leeward1157.9837.8689.4615.9573.1547.1528.9505.4492.7
All purpose871.4641.1537.9490.1463.6446.8434.2416.4405.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward593.51.0109
All purpose476.51.2591
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8965
Downwind "popa"1.0740
70% up, 30% down "Ilhabela"0.9433
30% up, 70% down "Ilhabela-inverso"1.0138
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Predominantly Upwind515.21.1645
Predominantly Downwind481.51.2461
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low589.51.0178
Triple Number AP Medium474.51.2646
Triple Number AP High430.71.3932
Triple Number Windward/Leeward Low795.80.7540
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Single Number Predominant Upwind532.51.1268
Single Number Predominant Reaching466.51.2861
Single Number Predominant Downwind500.91.1979
Predominant Upwind - Low693.20.8656
Predominant Upwind - Low/Med553.01.0850
Predominant Upwind - Medium503.51.1916
Predominant Upwind - Med/High476.21.2600
Predominant Upwind - High463.31.2952
Predominant Downwind Low713.80.8406
Predominant Downwind Low/Med539.41.1123
Predominant Downwind Medium467.01.2849
Predominant Downwind Med/High420.51.4269
Predominant Downwind High390.01.5385
Predominant Reaching Low622.20.9643
Predominant Reaching Low/Med490.91.2223
Predominant Reaching Medium440.91.3609
Predominant Reaching Med/High409.51.4652
Predominant Reaching High388.91.5427
SA/DSPL Upwind29.22SA/DSPL Downwind46.87
Scoring OptionTODTOT
5-Band Windward/Leeward Low881.00.6811
5-Band Windward/Leeward Low/Med668.20.8979
5-Band Windward/Leeward Medium581.91.0311
5-Band Windward/Leeward Med/High531.71.1284
5-Band Windward/Leeward High507.21.1829
Windward/Leeward 60-40 Low879.30.6824
Windward/Leeward 60-40 Low/Med674.50.8896
Windward/Leeward 60-40 Medium594.21.0098
Windward/Leeward 60-40 Med/High548.71.0935
Windward/Leeward 60-40 High528.11.1362
5-Band AP Low645.90.9289
5-Band AP Low/Med525.31.1423
5-Band AP Medium468.91.2796
5-Band AP Med/High435.81.3768
5-Band AP High417.51.4370
5-Band SF Bay Tour - Low761.70.7877
5-Band SF Bay Tour - Low/Med637.60.9411
5-Band SF Bay Tour - Medium560.41.0707
5-Band SF Bay Tour - Med/High515.71.1634
5-Band SF Bay Tour - High493.31.2164
Chicago-Mac Upwind1.0970
Chicago-Mac All Purpose1.1309
Chicago-Mac Downwind1.1564
Bayview-Mac Cove Island0.8493
Bayview-Mac Shore0.8568
Harvest Moon Regatta411.21.4590
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance519.4
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating519.41.1551
FinRating, kevyt tuuli862.51.1595
FinRating, kova tuuli420.21.1899
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.1551
Triple Number Coastal/Long Distance Low1.0178
Triple Number Coastal/Long Distance Medium1.2647
Triple Number Coastal/Long Distance High1.3932
Triple Number Windward/Leeward Low0.7857
Triple Number Windward/Leeward Medium1.0159
Triple Number Windward/Leeward High1.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
For information
General Purpose Handicap (GPH)529.7
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low589.5
Triple Number Coastal/Long Distance Medium474.4
Triple Number Coastal/Long Distance High430.7
Triple Number Windward/Leeward Low763.7
Triple Number Windward/Leeward Medium590.6
Triple Number Windward/Leeward High524.6
Predominantly Upwind515.2
Predominantly Downwind481.5
Predominantly Reaching459.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low1.0178
Triple Number Coastal/Long Distance Medium1.2647
Triple Number Coastal/Long Distance High1.3932
Triple Number Windward/Leeward Low0.7857
Triple Number Windward/Leeward Medium1.0159
Triple Number Windward/Leeward High1.1437
Coastal/Long Distance1.1551
Predominantly Upwind1.1645
Predominantly Downwind1.2461
For information
General Purpose Handicap (GPH)529.7
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.2591
Distanseseilas Trippeltall svak vind1.0178
Distanseseilas Trippeltall mellomvind1.2647
Distanseseilas Trippeltall sterk vind1.3932
Pølsebane Trippeltall svak vind0.7857
Pølsebane Trippeltall mellomvind1.0159
Pølsebane Trippeltall sterk vind1.1437
Motvind Singeltall1.1645
Medvind Singeltall1.2461
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Coastal/Long Distance519.41.1551
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind515.21.1645
Predominantly Downwind481.51.2461
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore496.51.2085
Cape Doctor Coastal408.51.4688
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low1.0178
Triple Number Coastal/Long Distance Medium1.2647
Triple Number Coastal/Long Distance High1.3932
Triple Number Windward/Leeward Low0.7857
Triple Number Windward/Leeward Medium1.0159
Triple Number Windward/Leeward High1.1437
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low1.0178
Triple Number Coastal/Long Distance Medium1.2647
Triple Number Coastal/Long Distance High1.3932
Triple Number Windward/Leeward Low0.7857
Triple Number Windward/Leeward Medium1.0159
Triple Number Windward/Leeward High1.1437
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Predominantly Upwind515.21.1645
Predominantly Downwind481.51.2461
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.41.1551
Triple Number Coastal/Long Distance Low589.51.0178
Triple Number Coastal/Long Distance Medium474.41.2647
Triple Number Coastal/Long Distance High430.71.3932
Triple Number Windward/Leeward Low763.70.7857
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1234.7838.5648.1553.7496.1463.4437.4397.1386.0
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low589.51.0178
Triple Number AP Medium474.51.2646
Triple Number AP High430.71.3932
Triple Number Windward/Leeward Low795.80.7540
Triple Number Windward/Leeward Medium590.61.0159
Triple Number Windward/Leeward High524.61.1437
Single Number Predominant Upwind532.51.1268
Single Number Predominant Reaching466.51.2861
Single Number Predominant Downwind500.91.1979
Predominant Upwind - Low693.20.8656
Predominant Upwind - Low/Med553.01.0850
Predominant Upwind - Medium503.51.1916
Predominant Upwind - Med/High476.21.2600
Predominant Upwind - High463.31.2952
Predominant Downwind Low713.80.8406
Predominant Downwind Low/Med539.41.1123
Predominant Downwind Medium467.01.2849
Predominant Downwind Med/High420.51.4269
Predominant Downwind High390.01.5385
Predominant Reaching Low622.20.9643
Predominant Reaching Low/Med490.91.2223
Predominant Reaching Medium440.91.3609
Predominant Reaching Med/High409.51.4652
Predominant Reaching High388.91.5427
SA/DSPL Upwind29.22SA/DSPL Downwind46.87
Scoring OptionTODTOT
5-Band Windward/Leeward Low881.00.6811
5-Band Windward/Leeward Low/Med668.20.8979
5-Band Windward/Leeward Medium581.91.0311
5-Band Windward/Leeward Med/High531.71.1284
5-Band Windward/Leeward High507.21.1829
Windward/Leeward 60-40 Low879.30.6824
Windward/Leeward 60-40 Low/Med674.50.8896
Windward/Leeward 60-40 Medium594.21.0098
Windward/Leeward 60-40 Med/High548.71.0935
Windward/Leeward 60-40 High528.11.1362
5-Band AP Low645.90.9289
5-Band AP Low/Med525.31.1423
5-Band AP Medium468.91.2796
5-Band AP Med/High435.81.3768
5-Band AP High417.51.4370
5-Band SF Bay Tour - Low761.70.7877
5-Band SF Bay Tour - Low/Med637.60.9411
5-Band SF Bay Tour - Medium560.41.0707
5-Band SF Bay Tour - Med/High515.71.1634
5-Band SF Bay Tour - High493.31.2164
Chicago-Mac Upwind1.0970
Chicago-Mac All Purpose1.1309
Chicago-Mac Downwind1.1564
Bayview-Mac Cove Island0.8493
Bayview-Mac Shore0.8568
Harvest Moon Regatta411.21.4590
Club Certificate2025
JU DOSESP-10598_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassX-50 SDMeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA15.220Max. Beam4.290Draft2.365Displacement12,622Wetted area43.84IMS L13.322LSM013.061Acc. length13.943Sink (kg/mm) 33.40
VCGD0.116VCGM0.113RM Rated (kg·m) 357.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight1,007Declared crew weight500
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.540PBWPIPA0.0039
EDL3.680ST10.048ST2
ST3ST40.112ST50.295
RIG
Forestay tensionAftInner stayFixedMast materialAluminumSingle headsail furlerYesMainsail furlerIn mastArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P19.900IG20.410ISP20.600MDT10.100MDL10.110MDT2MDL2TLMWGO
E6.900J5.650BAS2.000FSD0.050SFJ0.393SPLWPLTPS6.043BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered360.0Flotation Date01/01/2010
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
JU DOSESP-10598_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00184.27
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment0017.00NoNo 75.46
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment00120.30NaN171.98
CRUISER/RACER REQUIREMENTS*
Accommodation length13.9 mTable area0.66 m²Headroom1.88 mMinimum number of berths6Personal gear stowage0.24 m³Fresh water capacity237 lMinimum number of seats in cockpit6Food stowage0.36 m³Fuel capacity128 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.