International
Certificate
2023

Boat

Blue Skies

USA44022

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles45.4°43.2°41.8°41.2°40.8°40.2°39.9°
Beat VMG3.304.104.715.155.425.585.75
52°5.166.267.057.597.908.078.24
60°5.526.587.367.848.138.318.48
75°5.776.827.588.058.378.588.80
90°5.757.027.888.358.628.829.10
110°5.867.147.998.468.789.049.43
120°5.706.967.878.408.779.089.62
135°5.066.337.358.068.518.859.48
150°4.235.396.377.247.918.379.01
Run VMG3.664.675.526.276.917.428.28
Gybe Angles139.9°144.8°146.6°150.2°154.3°159.2°176.6°

APH: 532.2

CDL: 11.166

GPH: 603.3

CertNo: US4402

BOAT
ClassAlden Skye 51DesignerKaufmanBuilderMao TaAge date02/1980Series date01/1980Offset fileskye-51-USA22.offData fileUSA 44022
HULL
Length Overall15.540 mMaximum Beam4.332 mDraft2.204 mDisplacement19,422 kgDLR8.4955IMS DivisionCruiser/RacerDynamic Allowance0.540%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 4 bladesDiameter0.461m
CREW
Maximum weight1,088 kgMinimum weight816 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail46.7347.17Mizzen26.8427.17Headsail Luffed72.1572.15Headsail FlyingSymmetric158.74158.74Asymmetric152.96152.96 (1 asymmetric(s) with SHW/SFL < 85%) Mizzen Staysail48.3548.34
STORM SAIL AREAS (m²)
Trysail14.53Storm Jib17.03Heavy Weather Jib45.96
SAIL LIMITS
Headsails6  Spinnakers5 * Asymmetric may be tacked on the pole
STABILITY
Righting Moment435.6 kg·mStability Index131.5
COMMENTS
New carbon rudder 2023
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  04560002MFTIssued on 23/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Blue Skies

USA44022

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG1092.2877.3764.2698.6664.7645.6626.5
52°698.2575.3510.7474.4455.7445.9436.9
60°652.1546.8489.4459.1442.8433.3424.4
75°623.9528.0474.8447.4429.9419.5409.1
90°626.5513.0456.6431.3417.5408.4395.4
110°614.1503.9450.4425.6410.2398.2381.8
120°632.1517.5457.5428.4410.6396.5374.3
135°711.0568.6490.1446.5423.0406.6379.7
150°851.6667.5564.9497.2454.8430.3399.5
Run VMG983.4770.8652.3574.0521.3485.2434.6
Selected Courses
Windward / Leeward1037.8824.0708.2636.3593.0565.4530.5
All purpose789.3637.0555.7509.1482.2465.0443.9
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward668.50.8975
All purpose532.21.1275
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7823
Downwind "popa"0.9499
70% up, 30% down "Ilhabela"0.8260
30% up, 70% down "Ilhabela-inverso"0.8925
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Predominantly Upwind578.81.0367
Predominantly Downwind542.01.1069
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low713.20.8413
Triple Number All Purpose Medium528.51.1352
Triple Number All Purpose High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Predominantly Upwind578.81.0367
Predominantly Downwind542.01.1069
Predominantly Upwind Low808.70.7420
Predominantly Upwind Medium598.81.0020
Predominantly Upwind High534.41.1228
Predominantly Downwind Low772.00.7772
Predominantly Downwind Medium536.81.1178
Predominantly Downwind High445.81.3459
Chicago-Mac Upwind1.0133
Chicago-Mac All Purpose1.0455
Chicago-Mac Downwind1.0843
Bayview-Mac Cove Island0.9591
Bayview-Mac Shore0.9690
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching500.21.1994
Predominantly Reaching Low637.40.9414
Predominantly Reaching Medium494.61.2131
Predominantly Reaching High429.41.3972
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1021.30.5875
5-Band Low / Medium844.80.7102
5-Band Medium650.80.9220
5-Band Medium / High570.11.0524
5-Band High536.51.1183
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance583.5
Triple Number Coastal/Long Distance Low713.2
Triple Number Coastal/Long Distance Medium528.5
Triple Number Coastal/Long Distance High461.4
Triple Number Windward/Leeward Low931.0
Triple Number Windward/Leeward Medium665.1
Triple Number Windward/Leeward High559.2
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8413
Triple Number Coastal/Long Distance Medium1.1352
Triple Number Coastal/Long Distance High1.3004
Triple Number Windward/Leeward Low0.6445
Triple Number Windward/Leeward Medium0.9021
Triple Number Windward/Leeward High1.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low713.2
Triple Number Coastal/Long Distance Medium528.5
Triple Number Coastal/Long Distance High461.4
Triple Number Windward/Leeward Low931.0
Triple Number Windward/Leeward Medium665.1
Triple Number Windward/Leeward High559.2
Predominantly Upwind578.8
Predominantly Downwind542.0
Predominantly Reaching514.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8413
Triple Number Coastal/Long Distance Medium1.1352
Triple Number Coastal/Long Distance High1.3004
Triple Number Windward/Leeward Low0.6445
Triple Number Windward/Leeward Medium0.9021
Triple Number Windward/Leeward High1.0729
Coastal/Long Distance1.0283
Predominantly Upwind1.0367
Predominantly Downwind1.1069
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8413
Tretall Distanseseilas Mellomvind1.1352
Tretall Distanseseilas Mye vind1.3004
Tretall Pølsebane Lite vind0.6445
Tretall Pølsebane Mellomvind0.9021
Tretall Pølsebane Mye vind1.0729
Distanseseilas ett tall (OSN 8-16kn)1.0283
Distanseseilas ett tall (APH 6-20kn)1.1275
Enkeltall Motvind1.0367
Enkeltall Medvind1.1069
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Coastal/Long Distance583.51.0283
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind578.81.0367
Predominantly Downwind542.01.1069
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore541.01.1091
Cape Doctor Coastal450.21.3326
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8413
Triple Number Coastal/Long Distance Medium1.1352
Triple Number Coastal/Long Distance High1.3004
Triple Number Windward/Leeward Low0.6445
Triple Number Windward/Leeward Medium0.9021
Triple Number Windward/Leeward High1.0729
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8413
Triple Number Coastal/Long Distance Medium1.1352
Triple Number Coastal/Long Distance High1.3004
Triple Number Windward/Leeward Low0.6445
Triple Number Windward/Leeward Medium0.9021
Triple Number Windward/Leeward High1.0729
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Predominantly Upwind578.81.0367
Predominantly Downwind542.01.1069
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance583.51.0283
Triple Number Coastal/Long Distance Low713.20.8413
Triple Number Coastal/Long Distance Medium528.51.1352
Triple Number Coastal/Long Distance High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1032.3771.5632.3546.5501.1469.4424.8
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low713.20.8413
Triple Number All Purpose Medium528.51.1352
Triple Number All Purpose High461.41.3004
Triple Number Windward/Leeward Low931.00.6445
Triple Number Windward/Leeward Medium665.10.9021
Triple Number Windward/Leeward High559.21.0729
Predominantly Upwind578.81.0367
Predominantly Downwind542.01.1069
Predominantly Upwind Low808.70.7420
Predominantly Upwind Medium598.81.0020
Predominantly Upwind High534.41.1228
Predominantly Downwind Low772.00.7772
Predominantly Downwind Medium536.81.1178
Predominantly Downwind High445.81.3459
Chicago-Mac Upwind1.0133
Chicago-Mac All Purpose1.0455
Chicago-Mac Downwind1.0843
Bayview-Mac Cove Island0.9591
Bayview-Mac Shore0.9690
Harvest Moon Regatta454.61.3197
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy546.71.0975
San Francisco Bay Medium656.70.9137
Predominantly Reaching500.21.1994
Predominantly Reaching Low637.40.9414
Predominantly Reaching Medium494.61.2131
Predominantly Reaching High429.41.3972
Windward/Leeward 60-40 Low941.70.6372
Windward/Leeward 60-40 Medium686.20.8744
Windward/Leeward 60-40 High587.81.0208
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1021.30.5875
5-Band Low / Medium844.80.7102
5-Band Medium650.80.9220
5-Band Medium / High570.11.0524
5-Band High536.51.1183
ORC Ref  04560002MFTIssued on 23/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Blue Skies

USA44022

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassAlden Skye 51Measurement25/04/2023HINPlan reviewHull constructionSolidCarbon RudderYesLight stanchionsNoTrim tabNo
LOA15.540Max. Beam4.332Draft2.204Displacement19,422Wetted area53.88IMS L13.193LSM013.172Acc. length14.079Sink (kg/mm) 35.16
VCGD-0.298VCGM-0.129RM Rated (kg·m) 435.6Limit of positive stability(°) 120.1Stability Index131.5
PROPELLER
Propeller TypeFolding 4 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.461PBW0.120PIPA0.0125
PSD0.037PHD0.080PHL0.150
PSA28.0°ESL1.235
ST10.027ST20.223ST30.236
ST40.072ST50.269
RIG
Forestay tensionFixedInner stayFixedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P17.020IG18.340ISP18.840MDT10.151MDL10.274MDT20.136MDL20.230TL2.500MW0.244GO0.279
E4.875J5.835BAS1.720FSD0.042SFJ0.000SPL5.835WPLTPS5.835BD0.214MWTMCG
PY12.545MDT1Y0.147MDL1Y0.237MDT2Y0.129MDL2Y0.162TLY2.250BASY1.625EY3.675BDY0.166IY14.000EB5.580
Flying Headsail Foretriangles IdISPTPS118.8405.835
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date25/04/2023MeasurerComment
SFFP1.363FFM1.559FF1.587LCFcl8.880SG1.0100
SAFP14.790FAM1.052FA1.062LCFsh9.149HBI1.252
W1195.0W2195.0W3195.0W4195.0
PD1442.1PD2442.1PD3442.1PD4442.1
WD12.660PLM9000.00GSA1.0RSA1.0RM439.7
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG2Port fuel tankFuel1901907.70-0.301Stbd fuel tankFuel1901907.70-0.30Total deductible3197.70-0.30
Total deductible
ORC Ref  04560002MFTIssued on 23/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Blue Skies

USA44022

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM10.160.961.702.903.8546.7304/04/2023
MIZZEN
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.140.741.342.303.0126.8404/04/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentG10.101.001.963.956.008.1018.02YesNo 72.1505/04/2023
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS218.4318.4318.4310.4210.00158.7405/04/2023
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA219.0716.8017.9410.1310.6595%152.9617/03/2023Code 018.0116.2717.147.229.4876%109.5805/04/2023
MIZZEN STAYSAIL
IdYSHFYSHWYSFLAreaMeas.DateComment011.724.118.2848.3505/04/2023
ORC Ref  04560002MFTIssued on 23/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org