Non Spin/HSFClub 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 Angles41.8°41.8°39.7°38.9°38.5°38.3°38.2°38.6°40.6°
Beat VMG2.323.173.784.094.244.344.414.464.33
52°3.564.735.505.896.066.176.246.336.30
60°3.774.955.686.076.266.376.456.556.56
75°3.905.085.796.226.466.636.756.906.97
90°3.815.005.746.206.536.776.967.287.47
110°3.364.575.466.036.426.767.087.748.17
120°3.104.295.215.856.286.626.947.648.84
135°2.613.724.685.435.976.356.677.338.24
150°2.163.184.124.925.576.066.427.057.78
Run VMG1.872.753.604.405.105.686.136.787.44
Gybe Angles150.5°150.5°180.0°180.0°180.0°180.0°179.6°179.1°178.3°
APH ToD:664.1CDL: 6.437APH ToT: 0.9035CertNo:
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 Allowance0.260%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight230 kg(declared)Minimum weight130 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail22.9623.51Headsail Luffed10.6010.60Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail6.53Storm Jib3.95Heavy Weather Jib10.65
SAIL LIMITS
Headsails5
✱ Zero set flying
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  04140003UK4Issued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Non Spin/HSFClub 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 VMG1550.31136.3952.4879.2848.4829.6816.4807.4832.2
52°1010.0760.4654.8611.3594.1583.8576.5568.9571.4
60°955.7728.0634.2592.8574.9564.9557.8550.0548.6
75°922.2708.3621.5578.4557.0543.0533.6521.8516.5
90°945.9720.5626.9580.5551.2531.8517.5494.5481.9
110°1071.1787.3658.9596.6560.6532.9508.6464.9440.8
120°1160.7840.1690.6615.0573.3544.2518.6470.9407.4
135°1379.6968.3769.5663.2603.4566.7539.4491.3437.0
150°1665.21133.6873.1731.0645.8593.8560.4511.0463.0
Run VMG1929.31308.6999.4818.2705.7633.3587.5530.6484.0
Selected Courses
Windward / Leeward1736.51222.4975.9848.7777.0731.4701.9669.0658.1
All purpose1296.9937.3770.0687.2642.1613.2592.8564.5548.0
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward811.50.7394
All purpose664.10.9035
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6699
Downwind "popa"0.7523
70% up, 30% down "Ilhabela"0.6926
30% up, 70% down "Ilhabela-inverso"0.7255
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Predominantly Upwind707.40.8482
Predominantly Downwind686.50.8740
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low853.70.7029
Triple Number AP Medium660.60.9082
Triple Number AP High587.31.0216
Triple Number Windward/Leeward Low1150.50.5215
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Single Number Predominant Upwind733.30.8182
Single Number Predominant Reaching661.90.9065
Single Number Predominant Downwind720.30.8330
Predominant Upwind - Low989.10.6066
Predominant Upwind - Low/Med767.90.7813
Predominant Upwind - Medium686.90.8735
Predominant Upwind - Med/High643.90.9319
Predominant Upwind - High625.20.9596
Predominant Downwind Low1087.10.5519
Predominant Downwind Low/Med788.70.7608
Predominant Downwind Medium659.80.9094
Predominant Downwind Med/High581.61.0317
Predominant Downwind High539.31.1125
Predominant Reaching Low922.10.6507
Predominant Reaching Low/Med705.70.8503
Predominant Reaching Medium618.20.9705
Predominant Reaching Med/High566.01.0601
Predominant Reaching High536.21.1189
SA/DSPL Upwind22.22SA/DSPL Downwind22.22
Scoring OptionTODTOT
5-Band Windward/Leeward Low1290.10.4651
5-Band Windward/Leeward Low/Med938.00.6397
5-Band Windward/Leeward Medium791.60.7580
5-Band Windward/Leeward Med/High707.70.8478
5-Band Windward/Leeward High672.80.8918
Windward/Leeward 60-40 Low1270.90.4721
Windward/Leeward 60-40 Low/Med938.10.6396
Windward/Leeward 60-40 Medium804.50.7458
Windward/Leeward 60-40 Med/High730.10.8218
Windward/Leeward 60-40 High700.90.8560
5-Band AP Low956.30.6274
5-Band AP Low/Med746.60.8037
5-Band AP Medium651.30.9213
5-Band AP Med/High595.61.0073
5-Band AP High566.61.0590
5-Band SF Bay Tour - Low1102.50.5442
5-Band SF Bay Tour - Low/Med897.00.6689
5-Band SF Bay Tour - Medium768.50.7808
5-Band SF Bay Tour - Med/High696.00.8621
5-Band SF Bay Tour - High664.10.9035
Chicago-Mac Upwind0.7950
Chicago-Mac All Purpose0.8024
Chicago-Mac Downwind0.8007
Bayview-Mac Cove Island0.5836
Bayview-Mac Shore0.5906
Harvest Moon Regatta576.21.0413
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance722.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating722.50.8304
FinRating, kevyt tuuli1272.00.7862
FinRating, kova tuuli568.70.8791
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8304
Triple Number Coastal/Long Distance Low0.7029
Triple Number Coastal/Long Distance Medium0.9083
Triple Number Coastal/Long Distance High1.0216
Triple Number Windward/Leeward Low0.5459
Triple Number Windward/Leeward Medium0.7443
Triple Number Windward/Leeward High0.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
For information
General Purpose Handicap (GPH)745.5
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low853.6
Triple Number Coastal/Long Distance Medium660.6
Triple Number Coastal/Long Distance High587.3
Triple Number Windward/Leeward Low1099.1
Triple Number Windward/Leeward Medium806.1
Triple Number Windward/Leeward High696.9
Predominantly Upwind707.4
Predominantly Downwind686.5
Predominantly Reaching652.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7029
Triple Number Coastal/Long Distance Medium0.9083
Triple Number Coastal/Long Distance High1.0216
Triple Number Windward/Leeward Low0.5459
Triple Number Windward/Leeward Medium0.7443
Triple Number Windward/Leeward High0.8609
Coastal/Long Distance0.8304
Predominantly Upwind0.8482
Predominantly Downwind0.8740
For information
General Purpose Handicap (GPH)745.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9035
Distanseseilas Trippeltall svak vind0.7029
Distanseseilas Trippeltall mellomvind0.9083
Distanseseilas Trippeltall sterk vind1.0216
Pølsebane Trippeltall svak vind0.5459
Pølsebane Trippeltall mellomvind0.7443
Pølsebane Trippeltall sterk vind0.8609
Motvind Singeltall0.8482
Medvind Singeltall0.8740
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Coastal/Long Distance722.50.8304
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind707.40.8482
Predominantly Downwind686.50.8740
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore661.40.9072
Cape Doctor Coastal553.01.0851
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7029
Triple Number Coastal/Long Distance Medium0.9083
Triple Number Coastal/Long Distance High1.0216
Triple Number Windward/Leeward Low0.5459
Triple Number Windward/Leeward Medium0.7443
Triple Number Windward/Leeward High0.8609
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7029
Triple Number Coastal/Long Distance Medium0.9083
Triple Number Coastal/Long Distance High1.0216
Triple Number Windward/Leeward Low0.5459
Triple Number Windward/Leeward Medium0.7443
Triple Number Windward/Leeward High0.8609
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Predominantly Upwind707.40.8482
Predominantly Downwind686.50.8740
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance722.50.8304
Triple Number Coastal/Long Distance Low853.60.7029
Triple Number Coastal/Long Distance Medium660.60.9083
Triple Number Coastal/Long Distance High587.31.0216
Triple Number Windward/Leeward Low1099.10.5459
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1874.51231.0921.9770.2684.6636.2599.0539.0513.3
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low853.70.7029
Triple Number AP Medium660.60.9082
Triple Number AP High587.31.0216
Triple Number Windward/Leeward Low1150.50.5215
Triple Number Windward/Leeward Medium806.10.7443
Triple Number Windward/Leeward High696.90.8609
Single Number Predominant Upwind733.30.8182
Single Number Predominant Reaching661.90.9065
Single Number Predominant Downwind720.30.8330
Predominant Upwind - Low989.10.6066
Predominant Upwind - Low/Med767.90.7813
Predominant Upwind - Medium686.90.8735
Predominant Upwind - Med/High643.90.9319
Predominant Upwind - High625.20.9596
Predominant Downwind Low1087.10.5519
Predominant Downwind Low/Med788.70.7608
Predominant Downwind Medium659.80.9094
Predominant Downwind Med/High581.61.0317
Predominant Downwind High539.31.1125
Predominant Reaching Low922.10.6507
Predominant Reaching Low/Med705.70.8503
Predominant Reaching Medium618.20.9705
Predominant Reaching Med/High566.01.0601
Predominant Reaching High536.21.1189
SA/DSPL Upwind22.22SA/DSPL Downwind22.22
Scoring OptionTODTOT
5-Band Windward/Leeward Low1290.10.4651
5-Band Windward/Leeward Low/Med938.00.6397
5-Band Windward/Leeward Medium791.60.7580
5-Band Windward/Leeward Med/High707.70.8478
5-Band Windward/Leeward High672.80.8918
Windward/Leeward 60-40 Low1270.90.4721
Windward/Leeward 60-40 Low/Med938.10.6396
Windward/Leeward 60-40 Medium804.50.7458
Windward/Leeward 60-40 Med/High730.10.8218
Windward/Leeward 60-40 High700.90.8560
5-Band AP Low956.30.6274
5-Band AP Low/Med746.60.8037
5-Band AP Medium651.30.9213
5-Band AP Med/High595.61.0073
5-Band AP High566.61.0590
5-Band SF Bay Tour - Low1102.50.5442
5-Band SF Bay Tour - Low/Med897.00.6689
5-Band SF Bay Tour - Medium768.50.7808
5-Band SF Bay Tour - Med/High696.00.8621
5-Band SF Bay Tour - High664.10.9035
Chicago-Mac Upwind0.7950
Chicago-Mac All Purpose0.8024
Chicago-Mac Downwind0.8007
Bayview-Mac Cove Island0.5836
Bayview-Mac Shore0.5906
Harvest Moon Regatta576.21.0413
ORC Ref  04140003UK4Issued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Non Spin/HSFClub 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 L6.678LSM06.043Acc. length6.272Sink (kg/mm) 8.11
VCGD-0.239VCGM-0.219RM Rated (kg·m) 23.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight336Declared crew weight230
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  04140003UK4Issued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Non Spin/HSFClub 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
ORC Ref  04140003UK4Issued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org