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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 Angles | 42.1° | 42.1° | 39.7° | 37.4° | 36.7° | 36.1° | 35.7° | 35.5° | 36.7° |
| Beat VMG | 2.96 | 4.09 | 4.96 | 5.45 | 5.67 | 5.80 | 5.89 | 5.98 | 5.91 |
| 52° | 4.61 | 6.16 | 7.19 | 7.65 | 7.85 | 7.97 | 8.07 | 8.19 | 8.21 |
| 60° | 4.92 | 6.45 | 7.39 | 7.83 | 8.06 | 8.21 | 8.32 | 8.48 | 8.54 |
| 75° | 5.12 | 6.64 | 7.52 | 7.98 | 8.33 | 8.58 | 8.75 | 9.01 | 9.14 |
| 90° | 5.17 | 6.75 | 7.69 | 8.19 | 8.53 | 8.79 | 9.12 | 9.61 | 9.96 |
| 110° | 4.84 | 6.51 | 7.65 | 8.31 | 8.87 | 9.31 | 9.80 | 10.65 | 11.32 |
| 120° | 4.60 | 6.29 | 7.53 | 8.22 | 8.85 | 9.51 | 10.19 | 11.37 | 12.70 |
| 135° | 3.99 | 5.63 | 6.96 | 7.80 | 8.42 | 9.08 | 9.85 | 11.86 | 14.48 |
| 150° | 3.31 | 4.73 | 5.99 | 7.07 | 7.82 | 8.40 | 9.03 | 10.67 | 13.24 |
| Run VMG | 2.87 | 4.09 | 5.18 | 6.13 | 6.90 | 7.51 | 8.03 | 9.25 | 11.47 |
| Gybe Angles | 143.0° | 143.0° | 146.7° | 151.6° | 157.6° | 164.8° | 165.5° | 152.3° | 146.6° |
APH ToD:490.4CDL: 10.978APH ToT: 1.2236CertNo:350017
BOATClassCOOKSON 12MDesignerB.FarrBuilderCooksonAge date10.1995Series date09.1995Offset fileKZ232.OFFData fileRU3500 MEGAZIP
HULLLength Overall11.990 mMaximum Beam3.842 mDraft2.563 mDisplacement4 866 kgDLR4.3638IMS DivisionCruiser/RacerDynamic Allowance0.000%Age Allowance0.487%
PROPELLERInstallationStrutTypeFolding 2 bladesDiameter0.443m
CREWMaximum weight850 kg(declared)Minimum weight720 kg
✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS
(m²)
MeasuredRatedMainsail51.9853.26Headsail Luffed33.1633.16Headsail FlyingSymmetric127.87127.87Asymmetric105.30105.30
(1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS
(m²)
Trysail15.30Storm Jib10.75Heavy Weather Jib29.01
SAIL LIMITSHeadsails6Spinnakers5✱ Asymmetric may be tacked on the pole
STABILITYRighting Moment144.2 kg·mStability Index122.1
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.
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Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)ClassCOOKSON 12MMeasurement24.08.2022HINPlan reviewHull constructionCoredCarbon rudderYesLight stanchionsNoTrim tabNo
LOA11.990Max. Beam3.842Draft2.563Displacement4 866Wetted area26.67IMS L10.900LSM010.368Acc. length11.990Sink (kg/mm)
19.86
VCGD-0.329VCGM-0.202RM Rated
(kg·m)
144.2Limit of positive stability(°)
126.0Stability Index122.1Default crew weight725Declared crew weight850
PROPELLERPropeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.443PBW0.110PIPA0.0035
EDL1.145ST10.040ST20.180
ST30.180ST40.112ST50.272
RIGForestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footRunning backstays2CheckstaysSpreaders3Rotating mastNo
P15.047IG14.600ISP16.992MDT10.115MDL10.181MDT20.089MDL20.107TL2.392MW0.180GO0.197
E5.810J4.400BAS1.945FSD0.036SFJ0.055SPL5.150WPLTPS5.500BD0.085MWT200.00MCG
Flying Headsail Foretriangles
IdISPTPS
FLOTATION AND STABILITYCalculation methodBoom incliningFlotation Date24.08.2022MeasurerRUS32
SFFP0.431FFM1.385FF1.384LCFcl6.663SG1.0250
SAFP11.560FAM1.068FA1.071LCFsh6.916HBI1.216
W123.6W243.9W366.4W491.0LCFD10.440
PD132.8PD259.7PD391.4PD4131.7
WD5.600PLM2000.00GSA28.5RSA10568.0RM133.5
BALLASTIdKindDescriptionWeightLCGVCGTCGaFixed
TANKSIdDescriptionCapacityLCGVCGSp.WghtLevel
SailingaGazoil INOX808.51-0.180.8400
INVENTORYIdDescriptionWeight SailingLCGVCGGAIdDescriptionWeight SailingLCGVCGGAc8.35-0.25
b6.46-0.20
d
a6.06-0.20
INVENTORYBALLASTIdKindDescriptionWeightLCGVCGTCGaFixedFixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCGaGazoil INOXFuel80308.51-0.18Total deductible258.51-0.18
OTHER ITEMSIdKindDescriptionWeightLCGVCGcBattery228.35-0.25bBattery206.46-0.20aBattery206.06-0.20dEngineTotal deductible0
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MAINSAILIdMHBMUWMTWMHWMQWAreaMeas.DateComment010.181.192.193.774.8651.98
MIZZENIdMHBMUWMTWMHWMQWAreaMeas.DateComment
HEADSAILIdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment10.100.671.252.323.354.3614.57YesNo 33.16
SYMMETRIC SPINNAKERIdSLUSLESLSHWSFLAreaMeas.DateComment116.6516.6516.659.308.88127.87
ASYMMETRIC SPINNAKERIdSLUSLESLSHWSFLRatioAreaMeas.DateComment1115.2514.0014.638.409.6088%105.30CO14.8113.8114.316.088.0476%77.18
MIZZEN STAYSAILIdYSHFYSHWYSFLAreaMeas.DateComment
QUADRILATERALIdQLEQHLQFLQCDQLMMastAreaMeas.DateComment
CRUISER/RACER REQUIREMENTS*Accommodation length12.0 mTable area0.55 m²Headroom1.81 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity150 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity90 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.