Club Certificate2025
Isabell X2EST 420
Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
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 Angles43.7°43.7°41.3°40.0°38.9°38.5°38.2°38.2°38.8°
Beat VMG2.603.614.414.995.355.525.615.675.63
52°4.095.526.567.267.657.847.938.028.04
60°4.365.836.857.497.868.068.168.278.30
75°4.556.067.067.678.038.288.478.698.81
90°4.486.107.267.868.128.358.619.059.33
110°4.636.307.518.158.588.909.139.559.90
120°4.516.197.438.118.589.039.4410.0110.54
135°3.835.496.897.778.298.769.2510.3311.98
150°3.254.615.826.917.738.208.599.4110.48
Run VMG2.823.995.045.996.727.187.578.269.07
Gybe Angles142.6°142.6°146.6°147.6°152.1°155.5°160.0°160.4°144.4°
APH ToD:514.4CDL: 10.746APH ToT: 1.1664CertNo:
BOAT
ClassX4^3DesignerJeppesonBuilderX- YachtsAge date03/2020Series date02/2016Offset fileX^4.3.offData fileEST420
HULL
Length Overall12.478 mMaximum Beam3.970 mDraft2.524 mDisplacement9,684 kgDLR6.3211IMS DivisionCruiser/RacerDynamic Allowance0.230%Age Allowance0.292%
PROPELLER
InstallationStrutTypeFolding 3 bladesDiameter0.455m
CREW
Maximum weight700 kg(declared)Minimum weight570 kg ✱ when appliedNon Manual PowerSailsCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail52.1353.12Headsail Luffed43.2843.28Headsail FlyingSymmetricAsymmetric167.49167.49 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail15.38Storm Jib15.25Heavy Weather Jib41.18
SAIL LIMITS
Headsails6
✱ One set on the forestay
Spinnakers5
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
Isabell X2EST 420
Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
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 VMG1382.5997.6816.3721.8673.3652.6642.0634.5639.3
52°880.6651.9548.5495.7470.8459.1453.7448.6448.0
60°825.8617.3525.6480.3458.3446.8440.9435.1433.6
75°790.5594.4509.8469.5448.2434.6424.9414.2408.7
90°803.3590.2495.7457.8443.3431.4418.1398.0385.9
110°778.1571.0479.3441.6419.7404.7394.2377.1363.6
120°797.8581.3484.4444.0419.5398.8381.4359.6341.7
135°939.3656.2522.7463.4434.0410.8389.4348.6300.5
150°1107.2780.8619.0520.6465.8439.2419.1382.6343.6
Run VMG1278.7901.6714.8601.2536.1501.6475.4435.6396.8
Selected Courses
Windward / Leeward1330.5949.6765.6661.5604.7577.1558.7535.1518.1
All purpose1009.0729.2598.0530.6495.3475.7461.8442.3427.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward635.80.9437
All purpose514.41.1664
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8174
Downwind "popa"1.0081
70% up, 30% down "Ilhabela"0.8666
30% up, 70% down "Ilhabela-inverso"0.9422
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Predominantly Upwind560.31.0709
Predominantly Downwind518.31.1575
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low663.60.9041
Triple Number AP Medium510.81.1747
Triple Number AP High458.01.3102
Triple Number Windward/Leeward Low894.50.6708
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Single Number Predominant Upwind583.91.0275
Single Number Predominant Reaching511.41.1733
Single Number Predominant Downwind541.31.1084
Predominant Upwind - Low813.00.7380
Predominant Upwind - Low/Med617.10.9724
Predominant Upwind - Medium541.61.1077
Predominant Upwind - Med/High505.21.1876
Predominant Upwind - High489.51.2257
Predominant Downwind Low791.60.7580
Predominant Downwind Low/Med584.21.0271
Predominant Downwind Medium499.91.2002
Predominant Downwind Med/High450.11.3329
Predominant Downwind High417.81.4360
Predominant Reaching Low712.60.8420
Predominant Reaching Low/Med541.21.1087
Predominant Reaching Medium477.31.2569
Predominant Reaching Med/High440.21.3629
Predominant Reaching High415.71.4433
SA/DSPL Upwind20.84SA/DSPL Downwind47.98
Scoring OptionTODTOT
5-Band Windward/Leeward Low998.80.6007
5-Band Windward/Leeward Low/Med732.20.8194
5-Band Windward/Leeward Medium619.10.9691
5-Band Windward/Leeward Med/High561.71.0682
5-Band Windward/Leeward High536.21.1189
Windward/Leeward 60-40 Low1008.80.5948
Windward/Leeward 60-40 Low/Med743.50.8070
Windward/Leeward 60-40 Medium632.80.9482
Windward/Leeward 60-40 Med/High578.41.0374
Windward/Leeward 60-40 High556.31.0785
5-Band AP Low729.60.8223
5-Band AP Low/Med578.41.0374
5-Band AP Medium503.61.1913
5-Band AP Med/High463.71.2940
5-Band AP High443.01.3544
5-Band SF Bay Tour - Low863.20.6951
5-Band SF Bay Tour - Low/Med700.20.8569
5-Band SF Bay Tour - Medium596.91.0052
5-Band SF Bay Tour - Med/High544.61.1017
5-Band SF Bay Tour - High520.71.1523
Chicago-Mac Upwind0.9952
Chicago-Mac All Purpose1.0344
Chicago-Mac Downwind1.0694
Bayview-Mac Cove Island0.7545
Bayview-Mac Shore0.7589
Harvest Moon Regatta446.41.3442
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance560.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating560.31.0709
FinRating, kevyt tuuli978.21.0223
FinRating, kova tuuli445.91.1212
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0709
Triple Number Coastal/Long Distance Low0.9041
Triple Number Coastal/Long Distance Medium1.1748
Triple Number Coastal/Long Distance High1.3102
Triple Number Windward/Leeward Low0.6996
Triple Number Windward/Leeward Medium0.9522
Triple Number Windward/Leeward High1.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
For information
General Purpose Handicap (GPH)577.8
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low663.6
Triple Number Coastal/Long Distance Medium510.7
Triple Number Coastal/Long Distance High457.9
Triple Number Windward/Leeward Low857.6
Triple Number Windward/Leeward Medium630.1
Triple Number Windward/Leeward High554.4
Predominantly Upwind560.3
Predominantly Downwind518.3
Predominantly Reaching498.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9041
Triple Number Coastal/Long Distance Medium1.1748
Triple Number Coastal/Long Distance High1.3102
Triple Number Windward/Leeward Low0.6996
Triple Number Windward/Leeward Medium0.9522
Triple Number Windward/Leeward High1.0822
Coastal/Long Distance1.0709
Predominantly Upwind1.0709
Predominantly Downwind1.1575
For information
General Purpose Handicap (GPH)577.8
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.1664
Distanseseilas Trippeltall svak vind0.9041
Distanseseilas Trippeltall mellomvind1.1748
Distanseseilas Trippeltall sterk vind1.3102
Pølsebane Trippeltall svak vind0.6996
Pølsebane Trippeltall mellomvind0.9522
Pølsebane Trippeltall sterk vind1.0822
Motvind Singeltall1.0709
Medvind Singeltall1.1575
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Coastal/Long Distance560.31.0709
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind560.31.0709
Predominantly Downwind518.31.1575
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore523.21.1469
Cape Doctor Coastal431.61.3903
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9041
Triple Number Coastal/Long Distance Medium1.1748
Triple Number Coastal/Long Distance High1.3102
Triple Number Windward/Leeward Low0.6996
Triple Number Windward/Leeward Medium0.9522
Triple Number Windward/Leeward High1.0822
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9041
Triple Number Coastal/Long Distance Medium1.1748
Triple Number Coastal/Long Distance High1.3102
Triple Number Windward/Leeward Low0.6996
Triple Number Windward/Leeward Medium0.9522
Triple Number Windward/Leeward High1.0822
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Predominantly Upwind560.31.0709
Predominantly Downwind518.31.1575
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance560.31.0709
Triple Number Coastal/Long Distance Low663.60.9041
Triple Number Coastal/Long Distance Medium510.71.1748
Triple Number Coastal/Long Distance High457.91.3102
Triple Number Windward/Leeward Low857.60.6996
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1406.0944.8718.7596.8528.3493.6466.0423.5409.0
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low663.60.9041
Triple Number AP Medium510.81.1747
Triple Number AP High458.01.3102
Triple Number Windward/Leeward Low894.50.6708
Triple Number Windward/Leeward Medium630.10.9522
Triple Number Windward/Leeward High554.41.0822
Single Number Predominant Upwind583.91.0275
Single Number Predominant Reaching511.41.1733
Single Number Predominant Downwind541.31.1084
Predominant Upwind - Low813.00.7380
Predominant Upwind - Low/Med617.10.9724
Predominant Upwind - Medium541.61.1077
Predominant Upwind - Med/High505.21.1876
Predominant Upwind - High489.51.2257
Predominant Downwind Low791.60.7580
Predominant Downwind Low/Med584.21.0271
Predominant Downwind Medium499.91.2002
Predominant Downwind Med/High450.11.3329
Predominant Downwind High417.81.4360
Predominant Reaching Low712.60.8420
Predominant Reaching Low/Med541.21.1087
Predominant Reaching Medium477.31.2569
Predominant Reaching Med/High440.21.3629
Predominant Reaching High415.71.4433
SA/DSPL Upwind20.84SA/DSPL Downwind47.98
Scoring OptionTODTOT
5-Band Windward/Leeward Low998.80.6007
5-Band Windward/Leeward Low/Med732.20.8194
5-Band Windward/Leeward Medium619.10.9691
5-Band Windward/Leeward Med/High561.71.0682
5-Band Windward/Leeward High536.21.1189
Windward/Leeward 60-40 Low1008.80.5948
Windward/Leeward 60-40 Low/Med743.50.8070
Windward/Leeward 60-40 Medium632.80.9482
Windward/Leeward 60-40 Med/High578.41.0374
Windward/Leeward 60-40 High556.31.0785
5-Band AP Low729.60.8223
5-Band AP Low/Med578.41.0374
5-Band AP Medium503.61.1913
5-Band AP Med/High463.71.2940
5-Band AP High443.01.3544
5-Band SF Bay Tour - Low863.20.6951
5-Band SF Bay Tour - Low/Med700.20.8569
5-Band SF Bay Tour - Medium596.91.0052
5-Band SF Bay Tour - Med/High544.61.1017
5-Band SF Bay Tour - High520.71.1523
Chicago-Mac Upwind0.9952
Chicago-Mac All Purpose1.0344
Chicago-Mac Downwind1.0694
Bayview-Mac Cove Island0.7545
Bayview-Mac Shore0.7589
Harvest Moon Regatta446.41.3442
Club Certificate2025
Isabell X2EST 420
Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassX4^3Measurement26/08/2023HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA12.478Max. Beam3.970Draft2.524Displacement9,684Wetted area35.67IMS L11.653LSM011.527Acc. length12.478Sink (kg/mm) 26.66
VCGD-0.103VCGM-0.041RM Rated (kg·m) 243.2Limit of positive stability(°) N/AStability IndexN/ADefault crew weight843Declared crew weight700
PROPELLER
Propeller TypeFolding 3 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.455PBW0.117PIPA0.0040
EDL2.930ST10.055ST20.198
ST30.198ST40.115ST50.290
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerIn mastArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0Checkstays0Spreaders2Rotating mastNo
P15.950IG17.427ISP17.963MDT10.135MDL10.264MDT20.134MDL20.193TL1.800MW0.245GO0.255
E5.510J4.707BAS1.789FSDSFJ0.360SPLWPLTPS5.626BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date26/08/2023
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
Isabell X2EST 420
Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.241.152.033.534.6352.1305/06/2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment20.090.661.282.543.795.0517.04YesNo 43.2805/06/2024
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment220.1718.0719.1210.5710.28103%167.4917/05/2024119.4117.1918.3010.6210.07105%160.2826/08/2023
CRUISER/RACER REQUIREMENTS*
Accommodation length12.5 mTable area0.55 m²Headroom1.83 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity162 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity100 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.