Double HandedClub 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 Angles41.7°41.7°39.9°38.9°38.5°38.5°38.6°39.3°41.9°
Beat VMG2.473.343.944.244.354.414.444.424.20
52°3.774.985.736.056.196.266.316.346.26
60°3.995.205.916.216.376.456.506.566.53
75°4.145.366.056.386.576.716.806.926.95
90°4.055.326.106.446.686.867.047.287.41
110°4.025.346.196.606.897.167.337.627.83
120°3.825.156.076.576.927.237.548.078.50
135°3.304.605.636.316.737.117.498.5010.23
150°2.703.884.935.816.396.787.158.009.65
Run VMG2.333.364.285.075.756.266.657.358.36
Gybe Angles145.7°145.7°151.0°155.2°164.2°172.7°178.1°178.1°147.6°
APH ToD:621.1CDL: 7.000APH ToT: 0.9660CertNo:
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 weight200 kg(declared)Minimum weight120 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  04140003RNVIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub 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 VMG1456.61079.3914.5849.2826.8816.8811.1814.2856.3
52°954.1723.1628.8595.2582.0575.2570.7567.6575.1
60°902.7692.0609.2579.3565.4558.4553.5549.0551.7
75°869.9671.5594.9564.3548.1536.5529.4520.2518.2
90°889.2676.2590.4558.9539.2524.5511.7494.3485.9
110°895.5674.1581.6545.1522.3503.1491.0472.2459.6
120°941.4698.5592.9548.3520.4498.1477.1446.2423.6
135°1091.4782.9638.9570.7534.9506.4480.7423.4352.1
150°1334.7928.8729.7620.0563.7530.9503.4449.8373.1
Run VMG1542.61072.5842.0710.3626.5575.4541.5490.1430.8
Selected Courses
Windward / Leeward1497.41075.9878.2779.7726.7696.1676.3652.1643.6
All purpose1131.9832.0697.3636.0604.3584.5569.9548.2534.6
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward755.00.7947
All purpose621.10.9660
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6872
Downwind "popa"0.8645
70% up, 30% down "Ilhabela"0.7323
30% up, 70% down "Ilhabela-inverso"0.8024
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Predominantly Upwind674.10.8901
Predominantly Downwind620.40.9672
Custom scoring options for Canada
Scoring OptionTODTOT
TriNum AP Low764.60.7847
TriNum AP Med617.70.9713
TriNum AP High565.41.0611
TriNum W/L Low1019.40.5886
TriNum W/L Med749.30.8007
TriNum W/L Hig672.20.8926
Predom. Upwind698.00.8596
Predom. Reaching614.30.9767
Predom. Downwind646.00.9288
Predom. Up Low907.30.6613
Predom. Up L/M720.80.8324
Predom. Up Med658.50.9112
Predom. Up M/H628.30.9549
Predom. Up High616.10.9739
Predom. Dn Low922.60.6503
Predom. Dn L/M694.80.8635
Predom. Dn Med601.90.9969
Predom. Dn M/H542.81.1054
Predom. Dn High502.21.1947
Predom. Rc Low817.30.7342
Predom. Rc L/M644.20.9314
Predom. Rc Med580.91.0329
Predom. Rc M/H541.11.1088
Predom. Rc High513.61.1683
SA/DSPL Upwind24.01SA/DSPL Downwind41.76
Scoring OptionTODTOT
5B W/L Low1132.40.5299
5B W/L L/M850.20.7057
5B W/L Med738.80.8121
5B W/L M/H679.80.8826
5B W/L High654.80.9163
W/L 60-40 Low1132.40.5299
W/L 60-40 L/M860.70.6971
W/L 60-40 Med758.00.7916
W/L 60-40 M/H706.60.8491
W/L 60-40 High688.00.8720
5B AP Low840.00.7143
5B AP L/M681.80.8801
5B AP Med611.10.9819
5B AP M/H571.61.0497
5B AP High549.61.0916
5B SF Bay Low978.70.6131
5B SF Bay L/M815.30.7359
5B SF Bay Med718.10.8355
5B SF Bay M/H667.30.8992
5B SF Bay High643.60.9322
Chicago-Mac Upwind0.8390
Chicago-Mac All Purpose0.8703
Chicago-Mac Downwind0.8977
BayMac Cove Island916.10.6550
BayMac Shore908.90.6602
Harvest Moon541.51.1081
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance672.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating672.50.8921
FinRating, kevyt tuuli1112.30.8991
FinRating, kova tuuli552.70.9046
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8921
Triple Number Coastal/Long Distance Low0.7847
Triple Number Coastal/Long Distance Medium0.9714
Triple Number Coastal/Long Distance High1.0611
Triple Number Windward/Leeward Low0.6141
Triple Number Windward/Leeward Medium0.8007
Triple Number Windward/Leeward High0.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
For information
General Purpose Handicap (GPH)689.5
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low764.6
Triple Number Coastal/Long Distance Medium617.7
Triple Number Coastal/Long Distance High565.5
Triple Number Windward/Leeward Low977.0
Triple Number Windward/Leeward Medium749.3
Triple Number Windward/Leeward High672.2
Predominantly Upwind674.1
Predominantly Downwind620.4
Predominantly Reaching600.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7847
Triple Number Coastal/Long Distance Medium0.9714
Triple Number Coastal/Long Distance High1.0611
Triple Number Windward/Leeward Low0.6141
Triple Number Windward/Leeward Medium0.8007
Triple Number Windward/Leeward High0.8926
Coastal/Long Distance0.8921
Predominantly Upwind0.8901
Predominantly Downwind0.9672
For information
General Purpose Handicap (GPH)689.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9660
Distanseseilas Trippeltall svak vind0.7847
Distanseseilas Trippeltall mellomvind0.9714
Distanseseilas Trippeltall sterk vind1.0611
Pølsebane Trippeltall svak vind0.6141
Pølsebane Trippeltall mellomvind0.8007
Pølsebane Trippeltall sterk vind0.8926
Motvind Singeltall0.8901
Medvind Singeltall0.9672
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Coastal/Long Distance672.50.8921
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind674.10.8901
Predominantly Downwind620.40.9672
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore646.10.9286
Cape Doctor Coastal538.71.1138
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7847
Triple Number Coastal/Long Distance Medium0.9714
Triple Number Coastal/Long Distance High1.0611
Triple Number Windward/Leeward Low0.6141
Triple Number Windward/Leeward Medium0.8007
Triple Number Windward/Leeward High0.8926
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7847
Triple Number Coastal/Long Distance Medium0.9714
Triple Number Coastal/Long Distance High1.0611
Triple Number Windward/Leeward Low0.6141
Triple Number Windward/Leeward Medium0.8007
Triple Number Windward/Leeward High0.8926
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Predominantly Upwind674.10.8901
Predominantly Downwind620.40.9672
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance672.50.8921
Triple Number Coastal/Long Distance Low764.60.7847
Triple Number Coastal/Long Distance Medium617.70.9714
Triple Number Coastal/Long Distance High565.51.0611
Triple Number Windward/Leeward Low977.00.6141
Triple Number Windward/Leeward Medium749.30.8007
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.61075.5828.7709.2643.4606.2574.7523.1507.0
Custom scoring options for United States of America
Scoring OptionTODTOT
TriNum AP Low764.60.7847
TriNum AP Med617.70.9713
TriNum AP High565.41.0611
TriNum W/L Low1019.40.5886
TriNum W/L Med749.30.8007
TriNum W/L Hig672.20.8926
Predom. Upwind698.00.8596
Predom. Reaching614.30.9767
Predom. Downwind646.00.9288
Predom. Up Low907.30.6613
Predom. Up L/M720.80.8324
Predom. Up Med658.50.9112
Predom. Up M/H628.30.9549
Predom. Up High616.10.9739
Predom. Dn Low922.60.6503
Predom. Dn L/M694.80.8635
Predom. Dn Med601.90.9969
Predom. Dn M/H542.81.1054
Predom. Dn High502.21.1947
Predom. Rc Low817.30.7342
Predom. Rc L/M644.20.9314
Predom. Rc Med580.91.0329
Predom. Rc M/H541.11.1088
Predom. Rc High513.61.1683
SA/DSPL Upwind24.01SA/DSPL Downwind41.76
Scoring OptionTODTOT
5B W/L Low1132.40.5299
5B W/L L/M850.20.7057
5B W/L Med738.80.8121
5B W/L M/H679.80.8826
5B W/L High654.80.9163
W/L 60-40 Low1132.40.5299
W/L 60-40 L/M860.70.6971
W/L 60-40 Med758.00.7916
W/L 60-40 M/H706.60.8491
W/L 60-40 High688.00.8720
5B AP Low840.00.7143
5B AP L/M681.80.8801
5B AP Med611.10.9819
5B AP M/H571.61.0497
5B AP High549.61.0916
5B SF Bay Low978.70.6131
5B SF Bay L/M815.30.7359
5B SF Bay Med718.10.8355
5B SF Bay M/H667.30.8992
5B SF Bay High643.60.9322
Chicago-Mac Upwind0.8390
Chicago-Mac All Purpose0.8703
Chicago-Mac Downwind0.8977
BayMac Cove Island916.10.6550
BayMac Shore908.90.6602
Harvest Moon541.51.1081
ORC Ref  04140003RNVIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub 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 L7.476LSM07.266Acc. length9.380Sink (kg/mm) 11.42
VCGD-0.004VCGM0.017RM Rated (kg·m) 47.2Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weight200
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  04140003RNVIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub 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  04140003RNVIssued on 18/05/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org