Club 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°39.3°
Beat VMG2.423.313.984.394.574.664.714.754.65
52°3.754.995.796.206.396.486.546.616.60
60°3.985.225.986.356.556.656.726.816.83
75°4.095.356.116.486.736.897.007.157.22
90°4.045.366.206.606.827.027.227.507.69
110°3.965.316.236.697.047.337.587.978.26
120°3.765.106.076.606.997.347.698.479.17
135°3.264.555.586.306.737.117.508.4610.45
150°2.673.844.895.776.386.787.147.919.22
Run VMG2.313.324.245.035.726.256.657.328.08
Gybe Angles146.0°146.0°151.2°154.9°163.3°171.4°178.1°178.6°168.5°
APH ToD:609.0CDL: 7.393APH ToT: 0.9852CertNo:
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 Allowance0.080%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 FlyingSymmetric49.6149.61Asymmetric
STORM SAIL AREAS (m²)
Trysail8.59Storm Jib5.28Heavy Weather Jib14.25
SAIL LIMITS
Headsails5Spinnakers4
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  04140003RNNIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club 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 VMG1490.21088.6905.1820.1787.3772.6763.9758.0774.3
52°960.5722.1621.3580.7563.6555.8550.6544.8545.1
60°905.6689.7602.0566.9550.0541.4535.7528.7527.2
75°880.3672.8589.5555.2535.3522.2513.9503.3498.7
90°890.6672.1581.1545.6528.2512.8498.6480.0468.4
110°910.0677.7578.0537.9511.4491.0475.2451.7435.7
120°958.6705.5593.3545.2515.1490.2468.0425.2392.4
135°1103.9791.6644.6571.7534.6506.0480.1425.4344.4
150°1350.1938.3736.2623.9564.4531.1504.3454.9390.5
Run VMG1561.01083.5849.3715.5629.3576.4541.6491.5445.4
Selected Courses
Windward / Leeward1524.11086.1877.2767.8708.3674.5652.8624.8609.8
All purpose1148.6837.2694.5626.1590.3568.5552.6528.1508.3
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward739.50.8114
All purpose609.00.9852
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7124
Downwind "popa"0.8594
70% up, 30% down "Ilhabela"0.7509
30% up, 70% down "Ilhabela-inverso"0.8093
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Predominantly Upwind657.50.9126
Predominantly Downwind616.40.9734
Custom scoring options for Canada
Scoring OptionTODTOT
TriNum AP Low765.90.7834
TriNum AP Med605.50.9908
TriNum AP High547.41.0960
TriNum W/L Low1025.10.5853
TriNum W/L Med733.80.8177
TriNum W/L Hig647.70.9264
Predom. Upwind681.80.8800
Predom. Reaching605.90.9903
Predom. Downwind642.30.9341
Predom. Up Low911.80.6581
Predom. Up L/M710.80.8441
Predom. Up Med639.50.9383
Predom. Up M/H604.30.9928
Predom. Up High587.21.0217
Predom. Dn Low929.60.6454
Predom. Dn L/M694.00.8646
Predom. Dn Med596.41.0060
Predom. Dn M/H535.01.1215
Predom. Dn High493.81.2151
Predom. Rc Low819.90.7318
Predom. Rc L/M638.50.9397
Predom. Rc Med570.81.0512
Predom. Rc M/H528.81.1346
Predom. Rc High499.31.2017
SA/DSPL Upwind24.01SA/DSPL Downwind41.76
Scoring OptionTODTOT
5B W/L Low1143.70.5246
5B W/L L/M844.50.7105
5B W/L Med722.00.8311
5B W/L M/H656.40.9141
5B W/L High627.00.9569
W/L 60-40 Low1143.60.5247
W/L 60-40 L/M852.50.7038
W/L 60-40 Med737.20.8139
W/L 60-40 M/H678.40.8845
W/L 60-40 High654.00.9175
5B AP Low844.90.7101
5B AP L/M676.00.8875
5B AP Med598.11.0031
5B AP M/H554.31.0824
5B AP High528.91.1344
5B SF Bay Low985.60.6087
5B SF Bay L/M808.80.7419
5B SF Bay Med700.50.8565
5B SF Bay M/H643.30.9327
5B SF Bay High614.80.9759
Chicago-Mac Upwind0.8566
Chicago-Mac All Purpose0.8818
Chicago-Mac Downwind0.9015
BayMac Cove Island916.90.6544
BayMac Shore909.40.6597
Harvest Moon532.91.1260
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance660.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating660.30.9087
FinRating, kevyt tuuli1123.70.8899
FinRating, kova tuuli531.00.9416
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9087
Triple Number Coastal/Long Distance Low0.7834
Triple Number Coastal/Long Distance Medium0.9909
Triple Number Coastal/Long Distance High1.0960
Triple Number Windward/Leeward Low0.6112
Triple Number Windward/Leeward Medium0.8177
Triple Number Windward/Leeward High0.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
For information
General Purpose Handicap (GPH)679.9
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low765.9
Triple Number Coastal/Long Distance Medium605.5
Triple Number Coastal/Long Distance High547.4
Triple Number Windward/Leeward Low981.7
Triple Number Windward/Leeward Medium733.8
Triple Number Windward/Leeward High647.7
Predominantly Upwind657.5
Predominantly Downwind616.4
Predominantly Reaching593.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7834
Triple Number Coastal/Long Distance Medium0.9909
Triple Number Coastal/Long Distance High1.0960
Triple Number Windward/Leeward Low0.6112
Triple Number Windward/Leeward Medium0.8177
Triple Number Windward/Leeward High0.9264
Coastal/Long Distance0.9087
Predominantly Upwind0.9126
Predominantly Downwind0.9734
For information
General Purpose Handicap (GPH)679.9
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9852
Distanseseilas Trippeltall svak vind0.7834
Distanseseilas Trippeltall mellomvind0.9909
Distanseseilas Trippeltall sterk vind1.0960
Pølsebane Trippeltall svak vind0.6112
Pølsebane Trippeltall mellomvind0.8177
Pølsebane Trippeltall sterk vind0.9264
Motvind Singeltall0.9126
Medvind Singeltall0.9734
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Coastal/Long Distance660.30.9087
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind657.50.9126
Predominantly Downwind616.40.9734
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore614.30.9767
Cape Doctor Coastal514.21.1668
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7834
Triple Number Coastal/Long Distance Medium0.9909
Triple Number Coastal/Long Distance High1.0960
Triple Number Windward/Leeward Low0.6112
Triple Number Windward/Leeward Medium0.8177
Triple Number Windward/Leeward High0.9264
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7834
Triple Number Coastal/Long Distance Medium0.9909
Triple Number Coastal/Long Distance High1.0960
Triple Number Windward/Leeward Low0.6112
Triple Number Windward/Leeward Medium0.8177
Triple Number Windward/Leeward High0.9264
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Predominantly Upwind657.50.9126
Predominantly Downwind616.40.9734
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance660.30.9087
Triple Number Coastal/Long Distance Low765.90.7834
Triple Number Coastal/Long Distance Medium605.50.9909
Triple Number Coastal/Long Distance High547.41.0960
Triple Number Windward/Leeward Low981.70.6112
Triple Number Windward/Leeward Medium733.80.8177
Triple Number Windward/Leeward High647.70.9264
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1620.41085.8827.4698.3627.8589.5558.1504.9484.6
Custom scoring options for United States of America
Scoring OptionTODTOT
TriNum AP Low765.90.7834
TriNum AP Med605.50.9908
TriNum AP High547.41.0960
TriNum W/L Low1025.10.5853
TriNum W/L Med733.80.8177
TriNum W/L Hig647.70.9264
Predom. Upwind681.80.8800
Predom. Reaching605.90.9903
Predom. Downwind642.30.9341
Predom. Up Low911.80.6581
Predom. Up L/M710.80.8441
Predom. Up Med639.50.9383
Predom. Up M/H604.30.9928
Predom. Up High587.21.0217
Predom. Dn Low929.60.6454
Predom. Dn L/M694.00.8646
Predom. Dn Med596.41.0060
Predom. Dn M/H535.01.1215
Predom. Dn High493.81.2151
Predom. Rc Low819.90.7318
Predom. Rc L/M638.50.9397
Predom. Rc Med570.81.0512
Predom. Rc M/H528.81.1346
Predom. Rc High499.31.2017
SA/DSPL Upwind24.01SA/DSPL Downwind41.76
Scoring OptionTODTOT
5B W/L Low1143.70.5246
5B W/L L/M844.50.7105
5B W/L Med722.00.8311
5B W/L M/H656.40.9141
5B W/L High627.00.9569
W/L 60-40 Low1143.60.5247
W/L 60-40 L/M852.50.7038
W/L 60-40 Med737.20.8139
W/L 60-40 M/H678.40.8845
W/L 60-40 High654.00.9175
5B AP Low844.90.7101
5B AP L/M676.00.8875
5B AP Med598.11.0031
5B AP M/H554.31.0824
5B AP High528.91.1344
5B SF Bay Low985.60.6087
5B SF Bay L/M808.80.7419
5B SF Bay Med700.50.8565
5B SF Bay M/H643.30.9327
5B SF Bay High614.80.9759
Chicago-Mac Upwind0.8566
Chicago-Mac All Purpose0.8818
Chicago-Mac Downwind0.9015
BayMac Cove Island916.90.6544
BayMac Shore909.40.6597
Harvest Moon532.91.1260
ORC Ref  04140003RNNIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club 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 L7.590LSM07.266Acc. 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  04140003RNNIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club 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
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC10.3010.3010.305.795.7449.61North S2.5 2012ORC210.3010.3010.305.765.7649.44North S3 2016
ORC Ref  04140003RNNIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org