Non Spin/HSFClub Certificate2025
Elbåden Silent SeaNOR 10804
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 Angles44.9°44.9°42.9°41.1°39.8°39.3°38.9°38.7°39.2°
Beat VMG2.483.494.334.975.415.655.775.865.83
52°3.965.436.557.347.828.098.238.348.37
60°4.275.776.877.618.058.328.478.608.65
75°4.476.017.107.828.258.548.759.039.15
90°4.335.887.037.808.278.608.879.349.66
110°3.705.196.427.408.068.498.839.4810.10
120°3.404.846.107.107.848.348.709.3710.06
135°2.864.185.416.437.287.938.379.059.72
150°2.373.534.645.596.457.197.788.569.18
Run VMG2.063.064.024.915.786.577.278.298.96
Gybe Angles144.7°144.7°146.0°174.8°180.0°180.0°180.0°180.0°179.9°
APH ToD:544.4CDL: 11.466APH ToT: 1.1022CertNo:7998
BOAT
ClassFirst 47.7DesignerBruceFarrBuilderBeneteauAge date01/2002Series date01/2000Offset fileF191.OFFData file7998
HULL
Length Overall14.500 mMaximum Beam4.512 mDraft2.289 mDisplacement12,074 kgDLR6.0703IMS DivisionCruiser/RacerDynamic Allowance0.320%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.440m
CREW
Maximum weight954 kg(default)Minimum weight811 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail60.9563.04Headsail Luffed41.8741.87Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail17.91Storm Jib14.50Heavy Weather Jib39.15
SAIL LIMITS
Headsails7
✱ Zero set flying
Spinnakers0
✱ No 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.
Non Spin/HSFClub Certificate2025
Elbåden Silent SeaNOR 10804
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 VMG1451.01031.1830.5724.4665.1637.3624.2614.5617.1
52°909.8663.5549.5490.7460.1444.8437.7431.5430.2
60°843.7623.5523.8473.2446.9432.9424.9418.4416.2
75°805.6598.9506.7460.6436.6421.7411.2398.8393.4
90°832.3612.2512.0461.4435.1418.6405.6385.4372.8
110°972.1694.1560.4486.5446.9424.2407.7379.8356.3
120°1060.3743.7590.3507.0458.9431.9413.8384.1357.7
135°1259.5860.7665.7559.8494.4454.2430.0397.8370.2
150°1518.61020.1776.3643.8558.3500.9462.6420.8392.1
Run VMG1746.91177.9896.4733.2622.9548.1494.9434.0401.8
Selected Courses
Windward / Leeward1597.21104.5863.5728.8644.0592.7559.6524.3509.5
All purpose1182.4832.4663.6572.8518.8486.9466.6442.9429.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward681.20.8808
All purpose544.41.1022
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8192
Downwind "popa"0.8558
70% up, 30% down "Ilhabela"0.8298
30% up, 70% down "Ilhabela-inverso"0.8445
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Predominantly Upwind574.81.0439
Predominantly Downwind576.91.0401
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low748.00.8021
Triple Number AP Medium541.01.1091
Triple Number AP High462.81.2965
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Single Number Predominant Upwind600.90.9986
Single Number Predominant Reaching545.21.1005
Single Number Predominant Downwind609.10.9851
Predominant Upwind - Low880.90.6811
Predominant Upwind - Low/Med647.80.9263
Predominant Upwind - Medium550.21.0905
Predominant Upwind - Med/High499.71.2008
Predominant Upwind - High481.31.2466
Predominant Downwind Low969.70.6187
Predominant Downwind Low/Med680.70.8815
Predominant Downwind Medium549.71.0915
Predominant Downwind Med/High468.71.2803
Predominant Downwind High430.91.3924
Predominant Reaching Low811.50.7393
Predominant Reaching Low/Med592.91.0120
Predominant Reaching Medium499.51.2011
Predominant Reaching Med/High445.91.3456
Predominant Reaching High420.81.4257
SA/DSPL Upwind19.38SA/DSPL Downwind19.38
Scoring OptionTODTOT
5-Band Windward/Leeward Low1167.90.5138
5-Band Windward/Leeward Low/Med819.10.7325
5-Band Windward/Leeward Medium660.80.9080
5-Band Windward/Leeward Med/High566.31.0595
5-Band Windward/Leeward High527.81.1368
Windward/Leeward 60-40 Low1151.50.5211
Windward/Leeward 60-40 Low/Med814.90.7363
Windward/Leeward 60-40 Medium664.80.9025
Windward/Leeward 60-40 Med/High578.71.0368
Windward/Leeward 60-40 High545.61.0998
5-Band AP Low846.40.7089
5-Band AP Low/Med635.10.9448
5-Band AP Medium530.21.1317
5-Band AP Med/High470.41.2754
5-Band AP High444.61.3495
5-Band SF Bay Tour - Low990.00.6061
5-Band SF Bay Tour - Low/Med777.50.7717
5-Band SF Bay Tour - Medium634.50.9457
5-Band SF Bay Tour - Med/High552.41.0861
5-Band SF Bay Tour - High519.91.1541
Chicago-Mac Upwind0.9602
Chicago-Mac All Purpose0.9559
Chicago-Mac Downwind0.9389
Bayview-Mac Cove Island0.6624
Bayview-Mac Shore0.6708
Harvest Moon Regatta467.01.2848
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance598.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating598.91.0019
FinRating, kevyt tuuli1149.70.8698
FinRating, kova tuuli448.41.1151
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0019
Triple Number Coastal/Long Distance Low0.8021
Triple Number Coastal/Long Distance Medium1.1093
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6098
Triple Number Windward/Leeward Medium0.8853
Triple Number Windward/Leeward High1.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
For information
General Purpose Handicap (GPH)620.7
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low748.0
Triple Number Coastal/Long Distance Medium540.9
Triple Number Coastal/Long Distance High462.8
Triple Number Windward/Leeward Low983.9
Triple Number Windward/Leeward Medium677.7
Triple Number Windward/Leeward High554.6
Predominantly Upwind574.8
Predominantly Downwind576.9
Predominantly Reaching538.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8021
Triple Number Coastal/Long Distance Medium1.1093
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6098
Triple Number Windward/Leeward Medium0.8853
Triple Number Windward/Leeward High1.0818
Coastal/Long Distance1.0019
Predominantly Upwind1.0439
Predominantly Downwind1.0401
For information
General Purpose Handicap (GPH)620.7
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.1022
Distanseseilas Trippeltall svak vind0.8021
Distanseseilas Trippeltall mellomvind1.1093
Distanseseilas Trippeltall sterk vind1.2965
Pølsebane Trippeltall svak vind0.6098
Pølsebane Trippeltall mellomvind0.8853
Pølsebane Trippeltall sterk vind1.0818
Motvind Singeltall1.0439
Medvind Singeltall1.0401
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Coastal/Long Distance598.81.0019
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind574.81.0439
Predominantly Downwind576.91.0401
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore513.91.1675
Cape Doctor Coastal433.21.3850
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8021
Triple Number Coastal/Long Distance Medium1.1093
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6098
Triple Number Windward/Leeward Medium0.8853
Triple Number Windward/Leeward High1.0818
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8021
Triple Number Coastal/Long Distance Medium1.1093
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6098
Triple Number Windward/Leeward Medium0.8853
Triple Number Windward/Leeward High1.0818
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Predominantly Upwind574.81.0439
Predominantly Downwind576.91.0401
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance598.81.0019
Triple Number Coastal/Long Distance Low748.00.8021
Triple Number Coastal/Long Distance Medium540.91.1093
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low983.90.6098
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1736.01111.9810.9652.2556.1506.6472.3424.7409.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low748.00.8021
Triple Number AP Medium541.01.1091
Triple Number AP High462.81.2965
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium677.70.8853
Triple Number Windward/Leeward High554.61.0818
Single Number Predominant Upwind600.90.9986
Single Number Predominant Reaching545.21.1005
Single Number Predominant Downwind609.10.9851
Predominant Upwind - Low880.90.6811
Predominant Upwind - Low/Med647.80.9263
Predominant Upwind - Medium550.21.0905
Predominant Upwind - Med/High499.71.2008
Predominant Upwind - High481.31.2466
Predominant Downwind Low969.70.6187
Predominant Downwind Low/Med680.70.8815
Predominant Downwind Medium549.71.0915
Predominant Downwind Med/High468.71.2803
Predominant Downwind High430.91.3924
Predominant Reaching Low811.50.7393
Predominant Reaching Low/Med592.91.0120
Predominant Reaching Medium499.51.2011
Predominant Reaching Med/High445.91.3456
Predominant Reaching High420.81.4257
SA/DSPL Upwind19.38SA/DSPL Downwind19.38
Scoring OptionTODTOT
5-Band Windward/Leeward Low1167.90.5138
5-Band Windward/Leeward Low/Med819.10.7325
5-Band Windward/Leeward Medium660.80.9080
5-Band Windward/Leeward Med/High566.31.0595
5-Band Windward/Leeward High527.81.1368
Windward/Leeward 60-40 Low1151.50.5211
Windward/Leeward 60-40 Low/Med814.90.7363
Windward/Leeward 60-40 Medium664.80.9025
Windward/Leeward 60-40 Med/High578.71.0368
Windward/Leeward 60-40 High545.61.0998
5-Band AP Low846.40.7089
5-Band AP Low/Med635.10.9448
5-Band AP Medium530.21.1317
5-Band AP Med/High470.41.2754
5-Band AP High444.61.3495
5-Band SF Bay Tour - Low990.00.6061
5-Band SF Bay Tour - Low/Med777.50.7717
5-Band SF Bay Tour - Medium634.50.9457
5-Band SF Bay Tour - Med/High552.41.0861
5-Band SF Bay Tour - High519.91.1541
Chicago-Mac Upwind0.9602
Chicago-Mac All Purpose0.9559
Chicago-Mac Downwind0.9389
Bayview-Mac Cove Island0.6624
Bayview-Mac Shore0.6708
Harvest Moon Regatta467.01.2848
Non Spin/HSFClub Certificate2025
Elbåden Silent SeaNOR 10804
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassFirst 47.7MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA14.500Max. Beam4.512Draft2.289Displacement12,074Wetted area42.16IMS L12.850LSM012.575Acc. length14.500Sink (kg/mm) 32.27
VCGD0.170VCGM0.202RM Rated (kg·m) 327.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight954Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.440PBWPIPA0.0038
EDL1.100ST10.040ST20.140
ST30.140ST40.140ST50.240
RIG
Forestay tensionForwardInner stayNone FittedMast materialSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders3Rotating mastNo
P15.860IG16.930ISP17.250MDT10.140MDL10.270MDT20.140MDL20.200TL1.000MW0.270GO0.300
E6.450J5.200BAS1.910FSD0.050SFJ0.000SPL0.000WPLTPS6.300BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.170Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
Elbåden Silent SeaNOR 10804
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment451-2023032111300.152.062.963.765.1060.9521/03/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment1-2019022212450.100.621.202.483.885.3516.24NoNo 41.8708/01/2019Målt av C.with
CRUISER/RACER REQUIREMENTS*
Accommodation length14.5 mTable area0.66 m²Headroom1.90 mMinimum number of berths6Personal gear stowage0.24 m³Fresh water capacity255 lMinimum number of seats in cockpit6Food stowage0.36 m³Fuel capacity140 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.