International Certificate2026
Blue SkiesUSA 44022
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
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 Angles48.0°45.5°43.3°41.9°41.1°40.9°40.3°39.7°39.5°
Beat VMG2.313.384.184.795.215.465.615.785.83
52°3.695.276.377.157.667.958.108.258.31
60°4.055.646.697.457.908.178.338.478.56
75°4.335.896.937.678.108.408.588.788.91
90°4.195.787.017.858.328.598.799.099.29
110°4.165.937.238.068.528.839.109.459.82
120°4.055.787.057.948.458.809.119.7010.06
135°3.505.116.397.418.108.548.889.5310.20
150°2.894.275.446.437.297.968.419.049.68
Run VMG2.503.694.715.576.326.977.498.288.86
Gybe Angles139.5°141.5°144.9°146.7°151.2°155.3°160.3°173.4°178.1°
APH ToD:527.5CDL: 11.282APH ToT: 1.1374CertNo: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 Allowance0.520%Age Allowance0.650%RS Assessment-0.025%
PROPELLER
InstallationShaft exposedTypeFolding 4 bladesDiameter0.461m
CREW
Maximum weight1,088 kg(declared)Minimum weight925 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail49.3350.00Mizzen26.8427.17Headsail Luffed78.3278.32Headsail FlyingSymmetric158.74158.74Asymmetric158.66158.66 (1 asymmetric(s) with SHW/SFL < 85%) Mizzen Staysail48.3548.34
STORM SAIL AREAS Maximum (m²)
Trysail14.53Storm Jib17.03Heavy Weather Jib45.96
SAIL LIMITS
Headsails7Spinnakers5
✱ Asymmetric may be tacked on the pole
STABILITY
Righting Moment 435.6 kg·m Stability Index 131.2
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  04560004QDV Issued on 19/05/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
International Certificate2026
Blue SkiesUSA 44022
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
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 VMG1558.41066.5860.3751.4690.4659.6641.2623.2617.5
52°975.9683.1565.5503.3469.9453.1444.5436.5433.0
60°889.0638.8537.8483.3455.4440.7432.3424.8420.7
75°831.2610.9519.2469.6444.3428.8419.4409.9404.2
90°858.6623.0513.4458.7432.9419.0409.5396.0387.4
110°864.7607.6498.3446.6422.6407.7395.8380.9366.5
120°888.2622.9510.3453.2426.0409.1395.2371.2357.9
135°1028.7703.9563.8486.1444.3421.6405.6377.7352.9
150°1247.4844.0662.2559.7493.8452.3428.2398.2371.8
Run VMG1440.4974.6764.7646.3569.6516.8480.5435.0406.2
Selected Courses
Windward / Leeward1499.41020.6812.5698.9630.0588.2560.9529.1511.9
All purpose1121.3776.9628.7549.6505.2479.5462.8442.6429.7
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward661.20.9074
All purpose527.51.1374
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.7935
Downwind "popa"0.9573
70% up, 30% down "Ilhabela"0.8365
30% up, 70% down "Ilhabela-inverso"0.9015
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Predominantly Upwind573.21.0468
Predominantly Downwind538.21.1149
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP550.41.0901 Predom. Rc High420.51.4269 5B SF Bay L/M737.50.8136 TriNum AP Low702.80.8537 Predom. Dn Low856.50.7005 5B SF Bay Med618.80.9697 TriNum AP Med523.91.1452 Predom. Dn L/M616.50.9733 5B SF Bay M/H549.81.0913 TriNum AP High459.41.3061 Predom. Dn Med515.81.1633 5B SF Bay High519.91.1541 TriNum W/L Low963.40.6228 Predom. Dn M/H456.41.3147 5B AP Low783.20.7661 TriNum W/L Med657.80.9122 Predom. Dn High426.41.4071 5B AP L/M604.40.9927 TriNum W/L Hig555.81.0795 ChiMac Up Low754.30.7954 5B AP Med515.01.1649 Predom. Upwind601.00.9984 ChiMac Up Med668.30.8978 5B AP M/H465.81.2881 Predom. Reaching525.71.1413 ChiMac Up High569.21.0541 5B AP High443.91.3518 Predom. Downwind565.21.0615 ChiMac Off Low727.50.8248 5B W/L Low1088.30.5513 Predom. Up Low875.00.6857 ChiMac Off Med635.40.9443 5B W/L L/M776.10.7731 Predom. Up L/M642.70.9336 ChiMac Off High527.81.1367 5B W/L Med643.90.9318 Predom. Up Med550.91.0891 ChiMac AP Low737.00.8141 5B W/L M/H565.91.0602 Predom. Up M/H503.71.1911 ChiMac AP Med649.00.9245 5B W/L High531.61.1286 Predom. Up High485.01.2372 ChiMac AP High546.71.0975 W/L 60-40 Low1098.20.5464 Predom. Rc Low763.70.7857 BayMac Cove Island856.10.7008 W/L 60-40 L/M786.40.7630 Predom. Rc L/M563.01.0657 BayMac Shore849.30.7065 W/L 60-40 Med656.20.9143 Predom. Rc Med483.41.2413 Harvest Moon458.81.3078 W/L 60-40 M/H581.81.0312 Predom. Rc M/H441.01.3606 5B SF Bay Low909.50.6597 W/L 60-40 High550.41.0901      SA/DSPL Up21.17SA/DSPL Dn38.82
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance578.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating578.21.0377
FinRating, kevyt tuuli1070.30.9343
FinRating, kova tuuli446.91.1187
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.0377
Triple Number Coastal/Long Distance Low0.8537
Triple Number Coastal/Long Distance Medium1.1453
Triple Number Coastal/Long Distance High1.3061
Triple Number Windward/Leeward Low0.6546
Triple Number Windward/Leeward Medium0.9122
Triple Number Windward/Leeward High1.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
For information
General Purpose Handicap (GPH)597.2
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Saronikos S All Purpose617.40.9718
Saronikos S Upwind698.80.8586
Saronikos S Downwind517.71.1590
Saronikos N All Purpose642.00.9346
Saronikos N Upwind730.20.8217
Saronikos N Downwind562.21.0673
Saronikos SW All Purpose625.70.9589
Saronikos SW Upwind725.30.8273
Saronikos SW Downwind522.21.1490
Saronikos NE All Purpose667.50.8988
Saronikos NE Upwind682.90.8786
Saronikos NE Downwind634.60.9455
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose550.41.0901
5-Band All Purpose Low861.60.6964
5-Band All Purpose L/M627.40.9564
5-Band All Purpose Med532.01.1278
5-Band All Purpose M/H479.31.2519
5-Band All Purpose High455.11.3183
Single Number Predominant Upwind572.31.0484
Single Number Predominant Reaching501.91.1956
Single Number Predominant Downwind538.31.1146
5-Band 50-50 Windward/Leeward Low1088.30.5513
5-Band 50-50 Windward/Leeward L/M776.10.7731
5-Band 50-50 Windward/Leeward Med643.90.9318
5-Band 50-50 Windward/Leeward M/H565.91.0602
5-Band 50-50 Windward/Leeward High531.61.1286
5-Band 60-40 Windward/Leeward Low1098.20.5464
5-Band 60-40 Windward/Leeward L/M786.40.7630
5-Band 60-40 Windward/Leeward Med656.20.9143
5-Band 60-40 Windward/Leeward M/H581.81.0312
5-Band 60-40 Windward/Leeward High550.41.0901
Triple Number 50-50 Windward/Leeward Low963.40.6228
Triple Number 50-50 Windward/Leeward Med657.80.9121
Triple Number 50-50 Windward/Leeward High555.81.0795
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward673.80.8905
Triple Number 60-40 Windward/Leeward Low973.20.6165
Triple Number 60-40 Windward/Leeward Med669.70.8959
Triple Number 60-40 Windward/Leeward High572.51.0481
Triple Number All-Purpose Low767.50.7818
Triple Number All-Purpose Med541.61.1079
Triple Number All-Purpose High472.21.2705
Triple Number Predominant Upwind Low787.80.7616
Triple Number Predominant Upwind Med563.11.0655
Triple Number Predominant Upwind High501.81.1957
Triple Number Predominant Reaching Low687.80.8723
Triple Number Predominant Reaching Med500.21.1995
Triple Number Predominant Reaching High426.61.4065
Triple Number Predominant Downwind Low759.80.7897
Triple Number Predominant Downwind Med527.01.1386
Triple Number Predominant Downwind High440.11.3633
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low702.8
Triple Number Coastal/Long Distance Medium523.9
Triple Number Coastal/Long Distance High459.4
Triple Number Windward/Leeward Low916.6
Triple Number Windward/Leeward Medium657.8
Triple Number Windward/Leeward High555.8
Predominantly Upwind573.2
Predominantly Downwind538.2
Predominantly Reaching511.9
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8537
Triple Number Coastal/Long Distance Medium1.1453
Triple Number Coastal/Long Distance High1.3061
Triple Number Windward/Leeward Low0.6546
Triple Number Windward/Leeward Medium0.9122
Triple Number Windward/Leeward High1.0795
Coastal/Long Distance1.0377
Predominantly Upwind1.0468
Predominantly Downwind1.1149
For information
General Purpose Handicap (GPH)597.2
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.1374
Distanseseilas Trippeltall svak vind0.8537
Distanseseilas Trippeltall mellomvind1.1453
Distanseseilas Trippeltall sterk vind1.3061
Pølsebane Trippeltall svak vind0.6546
Pølsebane Trippeltall mellomvind0.9122
Pølsebane Trippeltall sterk vind1.0795
Motvind Singeltall1.0468
Medvind Singeltall1.1149
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Coastal/Long Distance578.21.0377
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind573.21.0468
Predominantly Downwind538.21.1149
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore517.01.1604
Cape Doctor Coastal433.51.3839
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8537
Triple Number Coastal/Long Distance Medium1.1453
Triple Number Coastal/Long Distance High1.3061
Triple Number Windward/Leeward Low0.6546
Triple Number Windward/Leeward Medium0.9122
Triple Number Windward/Leeward High1.0795
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8537
Triple Number Coastal/Long Distance Medium1.1453
Triple Number Coastal/Long Distance High1.3061
Triple Number Windward/Leeward Low0.6546
Triple Number Windward/Leeward Medium0.9122
Triple Number Windward/Leeward High1.0795
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Predominantly Upwind573.21.0468
Predominantly Downwind538.21.1149
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance578.21.0377
Triple Number Coastal/Long Distance Low702.80.8537
Triple Number Coastal/Long Distance Medium523.91.1453
Triple Number Coastal/Long Distance High459.41.3061
Triple Number Windward/Leeward Low916.60.6546
Triple Number Windward/Leeward Medium657.80.9122
Triple Number Windward/Leeward High555.81.0795
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1493.51016.0761.2624.8542.1498.4467.4423.9411.7
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP550.41.0901 Predom. Dn High426.41.4071 5B AP M/H465.81.2881 TriNum AP Low702.80.8537 Predom. Rc Low763.70.7857 5B AP High443.91.3518 TriNum AP Med523.91.1452 Predom. Rc L/M563.01.0657 5B SF Bay Low909.50.6597 TriNum AP High459.41.3061 Predom. Rc Med483.41.2413 5B SF Bay L/M737.50.8136 TriNum W/L Low963.40.6228 Predom. Rc M/H441.01.3606 5B SF Bay Med618.80.9697 TriNum W/L Med657.80.9122 Predom. Rc High420.51.4269 5B SF Bay M/H549.81.0913 TriNum W/L Hig555.81.0795 5B W/L Low1088.30.5513 5B SF Bay High519.91.1541 Predom. Upwind601.00.9984 5B W/L L/M776.10.7731 ChiMac Up Low754.30.7954 Predom. Reaching525.71.1413 5B W/L Med643.90.9318 ChiMac Up Med668.30.8978 Predom. Downwind565.21.0615 5B W/L M/H565.91.0602 ChiMac Up High569.21.0541 Predom. Up Low875.00.6857 5B W/L High531.61.1286 ChiMac Off Low727.50.8248 Predom. Up L/M642.70.9336 W/L 60-40 Low1098.20.5464 ChiMac Off Med635.40.9443 Predom. Up Med550.91.0891 W/L 60-40 L/M786.40.7630 ChiMac Off High527.81.1367 Predom. Up M/H503.71.1911 W/L 60-40 Med656.20.9143 ChiMac AP Low737.00.8141 Predom. Up High485.01.2372 W/L 60-40 M/H581.81.0312 ChiMac AP Med649.00.9245 Predom. Dn Low856.50.7005 W/L 60-40 High550.41.0901 ChiMac AP High546.71.0975 Predom. Dn L/M616.50.9733 5B AP Low783.20.7661 BayMac Cove Island856.10.7008 Predom. Dn Med515.81.1633 5B AP L/M604.40.9927 BayMac Shore849.30.7065 Predom. Dn M/H456.41.3147 5B AP Med515.01.1649 Harvest Moon458.81.3078      SA/DSPL Up21.17SA/DSPL Dn38.82
ORC Ref  04560004QDV Issued on 19/05/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
International Certificate2026
Blue SkiesUSA 44022
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
Length overall15.540Maximum beam4.332Draft2.204Displacement19,422Wetted area53.88IMS L13.207LSM013.172Accomod. length14.079Sink (kg/mm) 35.16
VCGD-0.298VCGM-0.129 RM Rated (kg·m) 435.6Limit of positive stability(°) 119.8 Stability Index 131.2 BLR index 0.0000Default crew weight1,020 Declared crew weight 1,088
Centerboard weightList angleCanting keel angle
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
BackstayFixedForestayFixedInner forestayFixedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders2Rotating 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 Date25/04/2023
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
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG2Port fuel tankFuel1901907.70-0.301Stbd fuel tankFuel1901907.70-0.30Total deductible3197.70-0.30
Total deductible
ORC Ref  04560004QDV Issued on 19/05/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
International Certificate2026
Blue SkiesUSA 44022
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMN10.151.041.853.164.0549.3329/04/2025M10.160.961.702.903.8546.7304/04/2023
MIZZEN
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.140.741.342.303.0126.8404/04/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentLt/Med-RM0.091.072.104.286.488.6618.18NoNo 78.3213/05/202416/3/24 remeasureG10.101.001.963.956.008.1018.02YesNo 72.1505/04/2023
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS218.4318.4318.4310.4210.00158.7405/04/2023
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA2-2519.5017.7018.6010.309.98103%158.6629/04/2025A219.0716.8017.9410.1310.6595%152.9617/03/2023Code 018.0116.2717.147.229.4876%109.5805/04/2023
MIZZEN STAYSAIL
IdYSHFYSHWYSFLAreaMeas.DateComment011.724.118.2848.3505/04/2023
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
CRUISER/RACER REQUIREMENTS*
Accommodation length14.1 mTable area0.66 m²Headroom1.89 mMinimum number of berths6Personal gear stowage0.24 m³Fresh water capacity243 lMinimum number of seats in cockpit6Food stowage0.36 m³Fuel capacity132 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.
ORC Ref  04560004QDV Issued on 19/05/2026 Valid until 28/02/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org