Double HandedClub Certificate2025
LottenFIN 51
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
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 Angles41.5°41.5°39.9°39.3°38.9°38.9°38.9°39.8°42.2°
Beat VMG2.343.173.744.014.144.234.294.304.13
52°3.564.725.465.815.976.076.146.216.14
60°3.754.925.656.006.186.296.366.446.43
75°3.895.065.776.186.406.576.676.816.86
90°3.865.105.866.176.486.706.907.197.36
110°3.865.125.946.416.696.877.047.377.92
120°3.704.955.816.336.737.087.347.808.24
135°3.234.445.386.056.486.897.318.669.90
150°2.613.744.745.556.136.546.927.8310.05
Run VMG2.263.244.114.855.506.016.407.138.70
Gybe Angles146.2°146.2°151.6°157.2°164.2°171.6°177.2°176.3°145.8°
APH ToD:645.7CDL: 6.258APH ToT: 0.9293CertNo:
BOAT
Class5.5 mrDesignerOhlsonBuilderArvidssonAge date01/1953Series date01/1950Offset fileint 5.5 from draakims.offData fileFIN51
HULL
Length Overall9.812 mMaximum Beam1.930 mDraft1.277 mDisplacement1,852 kgDLR8.3860IMS DivisionPerformanceDynamic Allowance0.210%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight155 kg(declared)Minimum weight120 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail22.9623.51Headsail Luffed10.6010.60Headsail FlyingSymmetric38.9138.91Asymmetric
STORM SAIL AREAS (m²)
Trysail6.53Storm Jib3.95Heavy Weather Jib10.65
SAIL LIMITS
Headsails5Spinnakers4
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  04140003UJTIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub Certificate2025
LottenFIN 51
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
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 VMG1537.31137.0963.3898.0868.7851.3838.9836.8871.8
52°1011.7763.1659.5620.0603.3593.1586.2579.6586.5
60°960.9731.3637.6599.5582.2572.5565.6558.6559.7
75°926.0711.2624.3582.8562.4548.3539.9528.9524.8
90°933.7705.7613.9583.5555.5537.1522.0500.7489.4
110°931.7703.0605.9561.5538.2523.8511.1488.3454.7
120°973.1727.2620.0569.0535.3508.4490.7461.7437.0
135°1115.6811.1669.0595.2555.1522.5492.7415.9363.6
150°1381.4963.0759.3649.0587.2550.6519.9459.8358.3
Run VMG1595.91112.0875.7741.9654.1599.3562.3504.9413.8
Selected Courses
Windward / Leeward1564.71124.5919.5819.9761.4725.3700.6670.8642.8
All purpose1184.1870.5729.8664.8628.2604.9587.3560.2538.1
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward789.20.7602
All purpose645.70.9293
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6569
Downwind "popa"0.8317
70% up, 30% down "Ilhabela"0.7011
30% up, 70% down "Ilhabela-inverso"0.7702
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Predominantly Upwind702.20.8544
Predominantly Downwind645.10.9301
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low800.10.7499
Triple Number AP Medium643.10.9330
Triple Number AP High581.51.0317
Triple Number Windward/Leeward Low1066.50.5626
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Single Number Predominant Upwind726.60.8257
Single Number Predominant Reaching636.50.9427
Single Number Predominant Downwind669.90.8957
Predominant Upwind - Low952.30.6301
Predominant Upwind - Low/Med755.30.7944
Predominant Upwind - Medium686.10.8746
Predominant Upwind - Med/High647.40.9267
Predominant Upwind - High629.20.9536
Predominant Downwind Low959.60.6253
Predominant Downwind Low/Med724.90.8277
Predominant Downwind Medium625.90.9586
Predominant Downwind Med/High558.51.0742
Predominant Downwind High509.41.1779
Predominant Reaching Low852.80.7035
Predominant Reaching Low/Med672.30.8925
Predominant Reaching Medium602.50.9958
Predominant Reaching Med/High554.81.0815
Predominant Reaching High520.71.1523
SA/DSPL Upwind22.22SA/DSPL Downwind40.95
Scoring OptionTODTOT
5-Band Windward/Leeward Low1183.80.5069
5-Band Windward/Leeward Low/Med891.20.6732
5-Band Windward/Leeward Medium773.20.7760
5-Band Windward/Leeward Med/High704.90.8512
5-Band Windward/Leeward High671.10.8940
Windward/Leeward 60-40 Low1185.70.5060
Windward/Leeward 60-40 Low/Med903.40.6642
Windward/Leeward 60-40 Medium793.80.7559
Windward/Leeward 60-40 Med/High732.60.8190
Windward/Leeward 60-40 High705.60.8504
5-Band AP Low878.10.6833
5-Band AP Low/Med712.60.8420
5-Band AP Medium635.40.9442
5-Band AP Med/High589.21.0184
5-Band AP High561.11.0694
5-Band SF Bay Tour - Low1023.90.5860
5-Band SF Bay Tour - Low/Med854.90.7018
5-Band SF Bay Tour - Medium751.00.7989
5-Band SF Bay Tour - Med/High690.80.8686
5-Band SF Bay Tour - High658.80.9107
Chicago-Mac Upwind0.8039
Chicago-Mac All Purpose0.8357
Chicago-Mac Downwind0.8638
Bayview-Mac Cove Island0.6272
Bayview-Mac Shore0.6321
Harvest Moon Regatta558.51.0742
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance699.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating699.70.8576
FinRating, kevyt tuuli1162.40.8603
FinRating, kova tuuli563.50.8874
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8576
Triple Number Coastal/Long Distance Low0.7499
Triple Number Coastal/Long Distance Medium0.9331
Triple Number Coastal/Long Distance High1.0317
Triple Number Windward/Leeward Low0.5871
Triple Number Windward/Leeward Medium0.7643
Triple Number Windward/Leeward High0.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
For information
General Purpose Handicap (GPH)718.2
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low800.1
Triple Number Coastal/Long Distance Medium643.0
Triple Number Coastal/Long Distance High581.6
Triple Number Windward/Leeward Low1022.0
Triple Number Windward/Leeward Medium785.0
Triple Number Windward/Leeward High695.7
Predominantly Upwind702.2
Predominantly Downwind645.1
Predominantly Reaching623.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7499
Triple Number Coastal/Long Distance Medium0.9331
Triple Number Coastal/Long Distance High1.0317
Triple Number Windward/Leeward Low0.5871
Triple Number Windward/Leeward Medium0.7643
Triple Number Windward/Leeward High0.8625
Coastal/Long Distance0.8576
Predominantly Upwind0.8544
Predominantly Downwind0.9301
For information
General Purpose Handicap (GPH)718.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9293
Distanseseilas Trippeltall svak vind0.7499
Distanseseilas Trippeltall mellomvind0.9331
Distanseseilas Trippeltall sterk vind1.0317
Pølsebane Trippeltall svak vind0.5871
Pølsebane Trippeltall mellomvind0.7643
Pølsebane Trippeltall sterk vind0.8625
Motvind Singeltall0.8544
Medvind Singeltall0.9301
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Coastal/Long Distance699.70.8576
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind702.20.8544
Predominantly Downwind645.10.9301
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore651.20.9214
Cape Doctor Coastal544.71.1015
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7499
Triple Number Coastal/Long Distance Medium0.9331
Triple Number Coastal/Long Distance High1.0317
Triple Number Windward/Leeward Low0.5871
Triple Number Windward/Leeward Medium0.7643
Triple Number Windward/Leeward High0.8625
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7499
Triple Number Coastal/Long Distance Medium0.9331
Triple Number Coastal/Long Distance High1.0317
Triple Number Windward/Leeward Low0.5871
Triple Number Windward/Leeward Medium0.7643
Triple Number Windward/Leeward High0.8625
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Predominantly Upwind702.20.8544
Predominantly Downwind645.10.9301
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance699.70.8576
Triple Number Coastal/Long Distance Low800.10.7499
Triple Number Coastal/Long Distance Medium643.00.9331
Triple Number Coastal/Long Distance High581.61.0317
Triple Number Windward/Leeward Low1022.00.5871
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1658.51123.2867.1743.8670.0626.6591.6535.4511.4
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low800.10.7499
Triple Number AP Medium643.10.9330
Triple Number AP High581.51.0317
Triple Number Windward/Leeward Low1066.50.5626
Triple Number Windward/Leeward Medium785.00.7643
Triple Number Windward/Leeward High695.70.8625
Single Number Predominant Upwind726.60.8257
Single Number Predominant Reaching636.50.9427
Single Number Predominant Downwind669.90.8957
Predominant Upwind - Low952.30.6301
Predominant Upwind - Low/Med755.30.7944
Predominant Upwind - Medium686.10.8746
Predominant Upwind - Med/High647.40.9267
Predominant Upwind - High629.20.9536
Predominant Downwind Low959.60.6253
Predominant Downwind Low/Med724.90.8277
Predominant Downwind Medium625.90.9586
Predominant Downwind Med/High558.51.0742
Predominant Downwind High509.41.1779
Predominant Reaching Low852.80.7035
Predominant Reaching Low/Med672.30.8925
Predominant Reaching Medium602.50.9958
Predominant Reaching Med/High554.81.0815
Predominant Reaching High520.71.1523
SA/DSPL Upwind22.22SA/DSPL Downwind40.95
Scoring OptionTODTOT
5-Band Windward/Leeward Low1183.80.5069
5-Band Windward/Leeward Low/Med891.20.6732
5-Band Windward/Leeward Medium773.20.7760
5-Band Windward/Leeward Med/High704.90.8512
5-Band Windward/Leeward High671.10.8940
Windward/Leeward 60-40 Low1185.70.5060
Windward/Leeward 60-40 Low/Med903.40.6642
Windward/Leeward 60-40 Medium793.80.7559
Windward/Leeward 60-40 Med/High732.60.8190
Windward/Leeward 60-40 High705.60.8504
5-Band AP Low878.10.6833
5-Band AP Low/Med712.60.8420
5-Band AP Medium635.40.9442
5-Band AP Med/High589.21.0184
5-Band AP High561.11.0694
5-Band SF Bay Tour - Low1023.90.5860
5-Band SF Bay Tour - Low/Med854.90.7018
5-Band SF Bay Tour - Medium751.00.7989
5-Band SF Bay Tour - Med/High690.80.8686
5-Band SF Bay Tour - High658.80.9107
Chicago-Mac Upwind0.8039
Chicago-Mac All Purpose0.8357
Chicago-Mac Downwind0.8638
Bayview-Mac Cove Island0.6272
Bayview-Mac Shore0.6321
Harvest Moon Regatta558.51.0742
ORC Ref  04140003UJTIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub Certificate2025
LottenFIN 51
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
Class5.5 mrMeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.812Max. Beam1.930Draft1.277Displacement1,852Wetted area13.65IMS L6.607LSM06.043Acc. length6.272Sink (kg/mm) 8.11
VCGD-0.240VCGM-0.220RM Rated (kg·m) 23.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weight155
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionInner stayMast materialSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders1Rotating mastNo
P10.300IG8.880ISP8.900MDT10.080MDL10.100MDT2MDL2TLMWGO
E3.620J2.700BAS0.700FSDSFJ1.200SPL2.700WPLTPSBDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date26/05/2024
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04140003UJTIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub Certificate2025
LottenFIN 51
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.250.841.462.443.0922.96
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment12.378.79NoNo 10.60
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment08.988.988.985.205.2038.91
ORC Ref  04140003UJTIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org