Club 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°38.1°38.6°40.6°
Beat VMG2.323.173.784.104.254.344.414.474.33
52°3.564.735.505.896.066.176.256.336.31
60°3.774.945.686.076.276.386.466.556.57
75°3.905.085.796.226.476.636.756.906.98
90°3.885.135.926.276.536.776.967.287.48
110°3.875.145.976.466.796.997.187.528.02
120°3.694.955.836.366.777.147.488.008.58
135°3.214.435.386.066.516.917.338.5910.30
150°2.593.734.735.556.166.576.957.829.90
Run VMG2.253.234.104.855.526.036.447.168.57
Gybe Angles146.2°146.2°151.6°157.0°163.9°170.9°176.3°175.9°144.4°
APH ToD:638.1CDL: 6.445APH ToT: 0.9403CertNo:
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 weight230 kg(declared)Minimum weight130 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  04140003UJHIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club 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 VMG1550.91136.5952.2878.6847.6828.8815.5806.3830.8
52°1010.1760.4654.7611.0593.7583.4576.1568.4570.8
60°955.8728.0634.2592.6574.5564.4557.4549.5548.1
75°922.4708.4621.4578.3556.8542.7533.3521.4516.1
90°929.0701.4608.0574.2551.3531.7517.3494.2481.5
110°931.1700.9602.7557.1530.6514.7501.6478.6448.6
120°976.1727.0617.8566.1531.6504.3481.1449.9419.7
135°1120.1813.1669.3593.7552.9520.9491.2419.3349.4
150°1388.0966.0760.5648.6584.8548.0518.2460.6363.8
Run VMG1603.41115.4877.0741.8652.5596.6559.3503.0420.1
Selected Courses
Windward / Leeward1575.71125.9914.6810.2750.1712.7687.4654.6625.4
All purpose1187.9870.0725.8657.4620.1596.0577.9549.6524.1
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward778.80.7704
All purpose638.10.9403
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6703
Downwind "popa"0.8324
70% up, 30% down "Ilhabela"0.7119
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 Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Predominantly Upwind692.60.8663
Predominantly Downwind641.30.9356
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low797.90.7520
Triple Number AP Medium635.40.9443
Triple Number AP High571.81.0493
Triple Number Windward/Leeward Low1065.50.5631
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Single Number Predominant Upwind716.90.8369
Single Number Predominant Reaching631.00.9509
Single Number Predominant Downwind666.20.9006
Predominant Upwind - Low951.30.6307
Predominant Upwind - Low/Med747.60.8026
Predominant Upwind - Medium675.30.8885
Predominant Upwind - Med/High635.10.9447
Predominant Upwind - High614.20.9770
Predominant Downwind Low960.60.6246
Predominant Downwind Low/Med722.20.8308
Predominant Downwind Medium621.40.9656
Predominant Downwind Med/High553.61.0838
Predominant Downwind High504.21.1899
Predominant Reaching Low851.50.7047
Predominant Reaching Low/Med667.40.8990
Predominant Reaching Medium596.51.0058
Predominant Reaching Med/High548.61.0936
Predominant Reaching High513.41.1686
SA/DSPL Upwind22.22SA/DSPL Downwind40.95
Scoring OptionTODTOT
5-Band Windward/Leeward Low1185.90.5059
5-Band Windward/Leeward Low/Med884.60.6782
5-Band Windward/Leeward Medium762.30.7871
5-Band Windward/Leeward Med/High691.40.8677
5-Band Windward/Leeward High655.30.9157
Windward/Leeward 60-40 Low1187.50.5052
Windward/Leeward 60-40 Low/Med895.30.6702
Windward/Leeward 60-40 Medium780.90.7683
Windward/Leeward 60-40 Med/High716.90.8369
Windward/Leeward 60-40 High686.60.8738
5-Band AP Low877.50.6838
5-Band AP Low/Med707.30.8482
5-Band AP Medium627.50.9561
5-Band AP Med/High579.71.0350
5-Band AP High550.11.0908
5-Band SF Bay Tour - Low1023.60.5862
5-Band SF Bay Tour - Low/Med848.00.7075
5-Band SF Bay Tour - Medium739.90.8109
5-Band SF Bay Tour - Med/High677.30.8858
5-Band SF Bay Tour - High642.70.9335
Chicago-Mac Upwind0.8141
Chicago-Mac All Purpose0.8433
Chicago-Mac Downwind0.8681
Bayview-Mac Cove Island0.6287
Bayview-Mac Shore0.6337
Harvest Moon Regatta553.11.0848
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance691.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating691.70.8675
FinRating, kevyt tuuli1164.80.8585
FinRating, kova tuuli551.70.9063
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8675
Triple Number Coastal/Long Distance Low0.7520
Triple Number Coastal/Long Distance Medium0.9444
Triple Number Coastal/Long Distance High1.0493
Triple Number Windward/Leeward Low0.5881
Triple Number Windward/Leeward Medium0.7747
Triple Number Windward/Leeward High0.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
For information
General Purpose Handicap (GPH)711.4
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low797.9
Triple Number Coastal/Long Distance Medium635.3
Triple Number Coastal/Long Distance High571.8
Triple Number Windward/Leeward Low1020.2
Triple Number Windward/Leeward Medium774.5
Triple Number Windward/Leeward High681.4
Predominantly Upwind692.6
Predominantly Downwind641.3
Predominantly Reaching618.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7520
Triple Number Coastal/Long Distance Medium0.9444
Triple Number Coastal/Long Distance High1.0493
Triple Number Windward/Leeward Low0.5881
Triple Number Windward/Leeward Medium0.7747
Triple Number Windward/Leeward High0.8805
Coastal/Long Distance0.8675
Predominantly Upwind0.8663
Predominantly Downwind0.9356
For information
General Purpose Handicap (GPH)711.4
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9403
Distanseseilas Trippeltall svak vind0.7520
Distanseseilas Trippeltall mellomvind0.9444
Distanseseilas Trippeltall sterk vind1.0493
Pølsebane Trippeltall svak vind0.5881
Pølsebane Trippeltall mellomvind0.7747
Pølsebane Trippeltall sterk vind0.8805
Motvind Singeltall0.8663
Medvind Singeltall0.9356
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Coastal/Long Distance691.70.8675
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind692.60.8663
Predominantly Downwind641.30.9356
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore634.20.9461
Cape Doctor Coastal531.71.1284
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7520
Triple Number Coastal/Long Distance Medium0.9444
Triple Number Coastal/Long Distance High1.0493
Triple Number Windward/Leeward Low0.5881
Triple Number Windward/Leeward Medium0.7747
Triple Number Windward/Leeward High0.8805
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7520
Triple Number Coastal/Long Distance Medium0.9444
Triple Number Coastal/Long Distance High1.0493
Triple Number Windward/Leeward Low0.5881
Triple Number Windward/Leeward Medium0.7747
Triple Number Windward/Leeward High0.8805
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Predominantly Upwind692.60.8663
Predominantly Downwind641.30.9356
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance691.70.8675
Triple Number Coastal/Long Distance Low797.90.7520
Triple Number Coastal/Long Distance Medium635.30.9444
Triple Number Coastal/Long Distance High571.81.0493
Triple Number Windward/Leeward Low1020.20.5881
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1671.31124.9862.7735.3660.9617.5582.1525.7499.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low797.90.7520
Triple Number AP Medium635.40.9443
Triple Number AP High571.81.0493
Triple Number Windward/Leeward Low1065.50.5631
Triple Number Windward/Leeward Medium774.50.7747
Triple Number Windward/Leeward High681.40.8805
Single Number Predominant Upwind716.90.8369
Single Number Predominant Reaching631.00.9509
Single Number Predominant Downwind666.20.9006
Predominant Upwind - Low951.30.6307
Predominant Upwind - Low/Med747.60.8026
Predominant Upwind - Medium675.30.8885
Predominant Upwind - Med/High635.10.9447
Predominant Upwind - High614.20.9770
Predominant Downwind Low960.60.6246
Predominant Downwind Low/Med722.20.8308
Predominant Downwind Medium621.40.9656
Predominant Downwind Med/High553.61.0838
Predominant Downwind High504.21.1899
Predominant Reaching Low851.50.7047
Predominant Reaching Low/Med667.40.8990
Predominant Reaching Medium596.51.0058
Predominant Reaching Med/High548.61.0936
Predominant Reaching High513.41.1686
SA/DSPL Upwind22.22SA/DSPL Downwind40.95
Scoring OptionTODTOT
5-Band Windward/Leeward Low1185.90.5059
5-Band Windward/Leeward Low/Med884.60.6782
5-Band Windward/Leeward Medium762.30.7871
5-Band Windward/Leeward Med/High691.40.8677
5-Band Windward/Leeward High655.30.9157
Windward/Leeward 60-40 Low1187.50.5052
Windward/Leeward 60-40 Low/Med895.30.6702
Windward/Leeward 60-40 Medium780.90.7683
Windward/Leeward 60-40 Med/High716.90.8369
Windward/Leeward 60-40 High686.60.8738
5-Band AP Low877.50.6838
5-Band AP Low/Med707.30.8482
5-Band AP Medium627.50.9561
5-Band AP Med/High579.71.0350
5-Band AP High550.11.0908
5-Band SF Bay Tour - Low1023.60.5862
5-Band SF Bay Tour - Low/Med848.00.7075
5-Band SF Bay Tour - Medium739.90.8109
5-Band SF Bay Tour - Med/High677.30.8858
5-Band SF Bay Tour - High642.70.9335
Chicago-Mac Upwind0.8141
Chicago-Mac All Purpose0.8433
Chicago-Mac Downwind0.8681
Bayview-Mac Cove Island0.6287
Bayview-Mac Shore0.6337
Harvest Moon Regatta553.11.0848
ORC Ref  04140003UJHIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club 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 L6.683LSM06.043Acc. length6.272Sink (kg/mm) 8.11
VCGD-0.240VCGM-0.220RM Rated (kg·m) 23.1Limit of positive stability(°) N/AStability IndexN/ADefault crew 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  04140003UJHIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club 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  04140003UJHIssued on 23/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org