Club
Certificate
Non Spinnaker
2023

Boat

Dubbel Duck

NOR 8856

Norges Seilforbund
Sognsveien 73
0854 OSLO
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles42.1°40.2°38.7°38.2°38.4°38.7°40.0°
Beat VMG3.484.124.434.544.584.604.53
52°5.255.956.266.396.466.506.52
60°5.496.116.416.576.666.726.77
75°5.636.226.566.806.967.077.19
90°5.546.206.586.897.157.367.63
110°5.005.886.406.797.167.528.26
120°4.705.676.266.667.037.418.29
135°4.145.135.886.366.737.097.89
150°3.514.505.345.986.416.767.47
Run VMG3.043.914.695.405.986.407.07
Gybe Angles146.6°154.1°162.2°171.8°179.0°179.0°179.9°

APH: 622.5

CDL: 7.064

GPH: 694.1

CertNo: 676004

BOAT
ClassOne Off 1/2 tonDesignerD.DuckmanBuilderOneOffAge dateSeries date01/1983Offset fileHALFTONNER-NOR8856.offData file676004
HULL
Length Overall9.152 mMaximum Beam3.324 mDraft1.501 mDisplacement2,030 kgDLR7.3750IMS DivisionCruiser/RacerDynamic Allowance0.090%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.360m
CREW
Maximum weight373 kgMinimum weight280 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail27.4727.95Headsail Luffed21.7821.78Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail8.45Storm Jib5.63Heavy Weather Jib15.20
SAIL LIMITS
Headsails5  Spinnakers0 * Spinnaker pole aboard
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.
ORC Ref  03440002NKLIssued on 02/06/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
2023

Boat

Dubbel Duck

NOR 8856

Norges Seilforbund
Sognsveien 73
0854 OSLO
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG1034.6874.2811.9792.8785.5782.8795.1
52°685.8604.6575.0563.6557.4553.8552.4
60°655.4588.8561.2547.7540.4535.8531.7
75°639.0578.5548.8529.4517.1509.4501.0
90°649.5580.5546.8522.4503.4489.0471.8
110°720.7611.8562.2529.9502.6478.9435.9
120°766.0635.4575.5540.9512.0485.7434.1
135°870.1701.7611.9565.9535.0507.7456.0
150°1025.6800.0674.6602.2561.4532.2481.9
Run VMG1184.2920.5767.6666.2601.8562.7509.2
Selected Courses
Windward / Leeward1109.4897.3789.7729.5693.6672.7652.1
All purpose849.4709.2641.0604.0580.9564.6542.3
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward760.60.7888
All purpose622.50.9638
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7147
Downwind "popa"0.8058
70% up, 30% down "Ilhabela"0.7398
30% up, 70% down "Ilhabela-inverso"0.7761
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Predominantly Upwind662.70.9054
Predominantly Downwind641.60.9352
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low779.20.7700
Triple Number All Purpose Medium619.30.9688
Triple Number All Purpose High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Predominantly Upwind662.70.9054
Predominantly Downwind641.60.9352
Predominantly Upwind Low834.10.7193
Predominantly Upwind Medium678.90.8837
Predominantly Upwind High655.30.9156
Predominantly Downwind Low889.10.6748
Predominantly Downwind Medium642.80.9335
Predominantly Downwind High531.81.1282
Chicago-Mac Upwind0.8913
Chicago-Mac All Purpose0.9044
Chicago-Mac Downwind0.9184
Bayview-Mac Cove Island0.8548
Bayview-Mac Shore0.8676
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching592.21.0132
Predominantly Reaching Low713.70.8406
Predominantly Reaching Medium590.01.0169
Predominantly Reaching High524.31.1444
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1093.10.5489
5-Band Low / Medium920.80.6516
5-Band Medium742.80.8078
5-Band Medium / High677.60.8855
5-Band High655.70.9150
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance676.4
Triple Number Coastal/Long Distance Low779.2
Triple Number Coastal/Long Distance Medium619.3
Triple Number Coastal/Long Distance High560.3
Triple Number Windward/Leeward Low1003.3
Triple Number Windward/Leeward Medium754.6
Triple Number Windward/Leeward High670.2
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7700
Triple Number Coastal/Long Distance Medium0.9688
Triple Number Coastal/Long Distance High1.0708
Triple Number Windward/Leeward Low0.5980
Triple Number Windward/Leeward Medium0.7951
Triple Number Windward/Leeward High0.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low779.2
Triple Number Coastal/Long Distance Medium619.3
Triple Number Coastal/Long Distance High560.3
Triple Number Windward/Leeward Low1003.3
Triple Number Windward/Leeward Medium754.6
Triple Number Windward/Leeward High670.2
Predominantly Upwind662.7
Predominantly Downwind641.6
Predominantly Reaching609.8
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7700
Triple Number Coastal/Long Distance Medium0.9688
Triple Number Coastal/Long Distance High1.0708
Triple Number Windward/Leeward Low0.5980
Triple Number Windward/Leeward Medium0.7951
Triple Number Windward/Leeward High0.8952
Coastal/Long Distance0.8870
Predominantly Upwind0.9054
Predominantly Downwind0.9352
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7700
Tretall Distanseseilas Mellomvind0.9688
Tretall Distanseseilas Mye vind1.0708
Tretall Pølsebane Lite vind0.5980
Tretall Pølsebane Mellomvind0.7951
Tretall Pølsebane Mye vind0.8952
Distanseseilas ett tall (OSN 8-16kn)0.8870
Distanseseilas ett tall (APH 6-20kn)0.9638
Enkeltall Motvind0.9054
Enkeltall Medvind0.9352
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Coastal/Long Distance676.40.8870
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind662.70.9054
Predominantly Downwind641.60.9352
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore658.30.9114
Cape Doctor Coastal549.01.0929
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7700
Triple Number Coastal/Long Distance Medium0.9688
Triple Number Coastal/Long Distance High1.0708
Triple Number Windward/Leeward Low0.5980
Triple Number Windward/Leeward Medium0.7951
Triple Number Windward/Leeward High0.8952
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7700
Triple Number Coastal/Long Distance Medium0.9688
Triple Number Coastal/Long Distance High1.0708
Triple Number Windward/Leeward Low0.5980
Triple Number Windward/Leeward Medium0.7951
Triple Number Windward/Leeward High0.8952
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Predominantly Upwind662.70.9054
Predominantly Downwind641.60.9352
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance676.40.8870
Triple Number Coastal/Long Distance Low779.20.7700
Triple Number Coastal/Long Distance Medium619.30.9688
Triple Number Coastal/Long Distance High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1116.9848.1717.4643.6602.9570.3514.4
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low779.20.7700
Triple Number All Purpose Medium619.30.9688
Triple Number All Purpose High560.31.0708
Triple Number Windward/Leeward Low1003.30.5980
Triple Number Windward/Leeward Medium754.60.7951
Triple Number Windward/Leeward High670.20.8952
Predominantly Upwind662.70.9054
Predominantly Downwind641.60.9352
Predominantly Upwind Low834.10.7193
Predominantly Upwind Medium678.90.8837
Predominantly Upwind High655.30.9156
Predominantly Downwind Low889.10.6748
Predominantly Downwind Medium642.80.9335
Predominantly Downwind High531.81.1282
Chicago-Mac Upwind0.8913
Chicago-Mac All Purpose0.9044
Chicago-Mac Downwind0.9184
Bayview-Mac Cove Island0.8548
Bayview-Mac Shore0.8676
Harvest Moon Regatta542.61.1058
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy660.30.9087
San Francisco Bay Medium748.20.8019
Predominantly Reaching592.21.0132
Predominantly Reaching Low713.70.8406
Predominantly Reaching Medium590.01.0169
Predominantly Reaching High524.31.1444
Windward/Leeward 60-40 Low993.60.6039
Windward/Leeward 60-40 Medium771.50.7777
Windward/Leeward 60-40 High710.30.8447
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1093.10.5489
5-Band Low / Medium920.80.6516
5-Band Medium742.80.8078
5-Band Medium / High677.60.8855
5-Band High655.70.9150
ORC Ref  03440002NKLIssued on 02/06/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
2023

Boat

Dubbel Duck

NOR 8856

Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassOne Off 1/2 tonMeasurementHINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA9.152Max. Beam3.324Draft1.501Displacement2,030Wetted area13.84IMS L7.034LSM06.504Acc. length9.152Sink (kg/mm) 10.40
VCGD-0.032VCGM0.062RM Rated (kg·m) 47.3Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.360PBWPIPA0.0012
PSD0.000PHD0.000PHL0.000
PSA0.0°ESL0.000
ST10.000ST20.000ST30.000
ST40.000ST50.000
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays2Spreaders2Rotating mastNo
P11.300IG10.610ISP10.690MDT10.090MDL10.110MDT20.000MDL20.000TLTaperMW0.000GO0.000
E4.270J3.120BAS1.310FSDFoilSFJ0.120SPL3.240WPLTPS0.000BDMWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.032Flotation Date01/01/2015MeasurerComment
SFFP0.409FFMFF1.010LCFcl4.858SG0.0000
SAFP8.037FAMFA0.980LCFsh5.128HBI0.980
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03440002NKLIssued on 02/06/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
2023

Boat

Dubbel Duck

NOR 8856

Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment460-2021091501190.230.851.492.563.4327.4714/09/2021
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment460-2021091511240.030.501.082.053.214.4710.13NoNo 21.7815/09/2021460-2021091511250.030.501.082.053.214.4710.13NoNo 21.7815/09/2021460-2021091501210.700.360.661.402.163.980.00NoNo 18.1314/09/2021
ORC Ref  03440002NKLIssued on 02/06/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org