Non Spin/HSFClub Certificate2025
TRUE BLUEFIN-5347
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
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 Angles42.5°42.5°40.2°38.4°37.5°37.4°37.3°37.6°39.4°
Beat VMG2.423.313.984.394.574.664.714.754.65
52°3.754.995.806.206.396.486.546.616.60
60°3.985.225.986.356.556.656.726.816.83
75°4.095.356.116.496.736.897.007.157.22
90°3.965.246.066.506.787.027.227.507.68
110°3.454.745.726.326.707.027.327.928.60
120°3.204.455.456.146.566.897.217.868.74
135°2.713.874.885.706.266.636.947.578.37
150°2.243.304.295.145.846.336.677.287.94
Run VMG1.942.863.744.575.315.936.387.027.64
Gybe Angles149.8°149.8°155.9°180.0°180.0°180.0°180.0°180.0°180.0°
APH ToD:632.1CDL: 7.390APH ToT: 0.9493CertNo:
BOAT
ClassFINNFLYER 31 LFDesignerEIVIND STILLBuilderPOLAR YACHTAge date06/1986Series date06/1986Offset fileFIN5347.offData fileFIN5347
HULL
Length Overall9.380 mMaximum Beam3.240 mDraft1.719 mDisplacement2,582 kgDLR6.7298IMS DivisionPerformanceDynamic Allowance0.160%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.405m
CREW
Maximum weight425 kg(declared)Minimum weight295 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail29.2429.91Headsail Luffed16.0916.09Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail8.59Storm Jib5.28Heavy Weather Jib14.25
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
Modded hull 2021
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  04140003RO3Issued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2025
TRUE BLUEFIN-5347
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
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 VMG1489.61088.1904.8820.0787.4772.8764.1758.3774.9
52°960.0721.8621.1580.7563.7555.9550.7544.9545.3
60°905.1689.4601.9566.8550.0541.5535.7528.8527.3
75°879.9672.6589.4555.1535.3522.1514.0503.4498.8
90°909.4687.1594.1554.2530.8512.7498.5480.0468.5
110°1043.7759.4629.5569.4537.2512.9491.8454.7418.6
120°1125.3809.3660.6585.9548.4522.4499.5458.0412.0
135°1328.6930.9737.4632.0575.4543.1518.7475.7429.9
150°1607.11091.3838.7700.9616.8568.9539.4494.8453.6
Run VMG1857.91260.1962.5788.0678.4607.0564.1512.8471.5
Selected Courses
Windward / Leeward1670.41174.1933.7804.0732.9689.9664.1635.6623.2
All purpose1248.0898.4734.7652.9609.4583.3565.7541.3524.7
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward768.90.7803
All purpose632.10.9493
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7124
Downwind "popa"0.7817
70% up, 30% down "Ilhabela"0.7319
30% up, 70% down "Ilhabela-inverso"0.7595
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Predominantly Upwind670.40.8950
Predominantly Downwind656.40.9141
Custom scoring options for Canada
Scoring OptionTODTOT
TriNum AP Low816.50.7348
TriNum AP Med627.90.9556
TriNum AP High561.01.0696
TriNum W/L Low1102.90.5440
TriNum W/L Med762.60.7868
TriNum W/L Hig659.80.9093
Predom. Upwind696.00.8621
Predom. Reaching632.70.9483
Predom. Downwind689.60.8701
Predom. Up Low945.50.6346
Predom. Up L/M729.00.8231
Predom. Up Med649.50.9237
Predom. Up M/H611.00.9820
Predom. Up High595.11.0082
Predom. Dn Low1043.60.5749
Predom. Dn L/M754.50.7953
Predom. Dn Med630.20.9521
Predom. Dn M/H557.11.0770
Predom. Dn High519.41.1551
Predom. Rc Low882.70.6798
Predom. Rc L/M672.80.8918
Predom. Rc Med589.81.0172
Predom. Rc M/H542.31.1064
Predom. Rc High516.31.1621
SA/DSPL Upwind24.01SA/DSPL Downwind24.01
Scoring OptionTODTOT
5B W/L Low1238.90.4843
5B W/L L/M893.70.6713
5B W/L Med748.50.8016
5B W/L M/H669.40.8963
5B W/L High638.40.9399
W/L 60-40 Low1219.70.4919
W/L 60-40 L/M891.90.6727
W/L 60-40 Med758.40.7911
W/L 60-40 M/H688.90.8710
W/L 60-40 High663.10.9048
5B AP Low916.70.6545
5B AP L/M711.50.8433
5B AP Med619.00.9693
5B AP M/H568.21.0559
5B AP High542.71.1056
5B SF Bay Low1057.60.5673
5B SF Bay L/M853.40.7030
5B SF Bay Med725.70.8268
5B SF Bay M/H658.40.9113
5B SF Bay High630.30.9519
Chicago-Mac Upwind0.8380
Chicago-Mac All Purpose0.8419
Chicago-Mac Downwind0.8365
BayMac Cove Island983.20.6103
BayMac Shore971.60.6176
Harvest Moon553.01.0850
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance687.6
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating687.60.8726
FinRating, kevyt tuuli1221.50.8187
FinRating, kova tuuli546.10.9157
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8726
Triple Number Coastal/Long Distance Low0.7348
Triple Number Coastal/Long Distance Medium0.9557
Triple Number Coastal/Long Distance High1.0696
Triple Number Windward/Leeward Low0.5693
Triple Number Windward/Leeward Medium0.7868
Triple Number Windward/Leeward High0.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
For information
General Purpose Handicap (GPH)710.4
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low816.5
Triple Number Coastal/Long Distance Medium627.8
Triple Number Coastal/Long Distance High561.0
Triple Number Windward/Leeward Low1053.9
Triple Number Windward/Leeward Medium762.6
Triple Number Windward/Leeward High659.8
Predominantly Upwind670.4
Predominantly Downwind656.4
Predominantly Reaching623.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7348
Triple Number Coastal/Long Distance Medium0.9557
Triple Number Coastal/Long Distance High1.0696
Triple Number Windward/Leeward Low0.5693
Triple Number Windward/Leeward Medium0.7868
Triple Number Windward/Leeward High0.9093
Coastal/Long Distance0.8726
Predominantly Upwind0.8950
Predominantly Downwind0.9141
For information
General Purpose Handicap (GPH)710.4
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9493
Distanseseilas Trippeltall svak vind0.7348
Distanseseilas Trippeltall mellomvind0.9557
Distanseseilas Trippeltall sterk vind1.0696
Pølsebane Trippeltall svak vind0.5693
Pølsebane Trippeltall mellomvind0.7868
Pølsebane Trippeltall sterk vind0.9093
Motvind Singeltall0.8950
Medvind Singeltall0.9141
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Coastal/Long Distance687.60.8726
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind670.40.8950
Predominantly Downwind656.40.9141
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore626.90.9571
Cape Doctor Coastal529.71.1327
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7348
Triple Number Coastal/Long Distance Medium0.9557
Triple Number Coastal/Long Distance High1.0696
Triple Number Windward/Leeward Low0.5693
Triple Number Windward/Leeward Medium0.7868
Triple Number Windward/Leeward High0.9093
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7348
Triple Number Coastal/Long Distance Medium0.9557
Triple Number Coastal/Long Distance High1.0696
Triple Number Windward/Leeward Low0.5693
Triple Number Windward/Leeward Medium0.7868
Triple Number Windward/Leeward High0.9093
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Predominantly Upwind670.40.8950
Predominantly Downwind656.40.9141
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance687.60.8726
Triple Number Coastal/Long Distance Low816.50.7348
Triple Number Coastal/Long Distance Medium627.80.9557
Triple Number Coastal/Long Distance High561.01.0696
Triple Number Windward/Leeward Low1053.90.5693
Triple Number Windward/Leeward Medium762.60.7868
Triple Number Windward/Leeward High659.80.9093
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1806.61182.7881.7730.6648.3604.7572.0519.3498.5
Custom scoring options for United States of America
Scoring OptionTODTOT
TriNum AP Low816.50.7348
TriNum AP Med627.90.9556
TriNum AP High561.01.0696
TriNum W/L Low1102.90.5440
TriNum W/L Med762.60.7868
TriNum W/L Hig659.80.9093
Predom. Upwind696.00.8621
Predom. Reaching632.70.9483
Predom. Downwind689.60.8701
Predom. Up Low945.50.6346
Predom. Up L/M729.00.8231
Predom. Up Med649.50.9237
Predom. Up M/H611.00.9820
Predom. Up High595.11.0082
Predom. Dn Low1043.60.5749
Predom. Dn L/M754.50.7953
Predom. Dn Med630.20.9521
Predom. Dn M/H557.11.0770
Predom. Dn High519.41.1551
Predom. Rc Low882.70.6798
Predom. Rc L/M672.80.8918
Predom. Rc Med589.81.0172
Predom. Rc M/H542.31.1064
Predom. Rc High516.31.1621
SA/DSPL Upwind24.01SA/DSPL Downwind24.01
Scoring OptionTODTOT
5B W/L Low1238.90.4843
5B W/L L/M893.70.6713
5B W/L Med748.50.8016
5B W/L M/H669.40.8963
5B W/L High638.40.9399
W/L 60-40 Low1219.70.4919
W/L 60-40 L/M891.90.6727
W/L 60-40 Med758.40.7911
W/L 60-40 M/H688.90.8710
W/L 60-40 High663.10.9048
5B AP Low916.70.6545
5B AP L/M711.50.8433
5B AP Med619.00.9693
5B AP M/H568.21.0559
5B AP High542.71.1056
5B SF Bay Low1057.60.5673
5B SF Bay L/M853.40.7030
5B SF Bay Med725.70.8268
5B SF Bay M/H658.40.9113
5B SF Bay High630.30.9519
Chicago-Mac Upwind0.8380
Chicago-Mac All Purpose0.8419
Chicago-Mac Downwind0.8365
BayMac Cove Island983.20.6103
BayMac Shore971.60.6176
Harvest Moon553.01.0850
ORC Ref  04140003RO3Issued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2025
TRUE BLUEFIN-5347
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassFINNFLYER 31 LFMeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.380Max. Beam3.240Draft1.719Displacement2,582Wetted area15.54IMS L7.588LSM07.266Acc. length9.380Sink (kg/mm) 11.42
VCGD-0.004VCGM0.017RM Rated (kg·m) 47.2Limit of positive stability(°) N/AStability IndexN/ADefault crew weight436Declared crew weight425
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.405PBW0.100PIPA0.0044
PSD0.025PHD0.067PHL0.120
PSA18.0°ESL0.930
ST10.022ST20.095ST30.095
ST40.043ST50.300
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1Checkstays1Spreaders2Rotating mastNo
P11.519IG10.209ISP10.410MDT10.085MDL10.135MDT20.054MDL20.092TL2.270MW0.135GO0.155
E4.257J3.210BAS1.309FSD0.026SFJSPL3.200WPLTPSBD0.137MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered49.5Flotation Date14/05/1993
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04140003RO3Issued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2025
TRUE BLUEFIN-5347
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.150.881.612.763.5829.24North 2014
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC0.080.470.811.612.312.9910.30NoNo 16.09North G1 Light 2020ORC20.080.460.841.552.252.9610.30NoNo 15.80North New G1 med+heavy 2020
ORC Ref  04140003RO3Issued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org