Club
Certificate
Non Spinnaker
2023

Boat

Lethe

NOR 12488

Norges Seilforbund
Sognsveien 73
0854 OSLO
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles43.0°40.8°39.4°38.8°38.4°38.4°40.0°
Beat VMG3.424.134.614.834.924.964.94
52°5.206.106.646.896.997.057.09
60°5.476.336.817.077.207.277.33
75°5.656.496.957.247.457.607.74
90°5.556.456.967.287.557.798.14
110°4.935.996.727.157.497.828.44
120°4.635.726.527.017.377.708.37
135°4.045.126.016.667.097.428.07
150°3.424.445.286.026.597.007.61
Run VMG2.963.844.695.476.166.707.41
Gybe Angles145.1°146.6°172.1°173.9°175.7°177.5°178.6°

APH: 598.8

CDL: 8.530

GPH: 674.9

CertNo: 9836

BOAT
ClassFirst 34.7DesignerB.FarrBuilderBeneteauAge date01/2008Series date01/2004Offset fileFIRST347.offData file9836
HULL
Length Overall9.980 mMaximum Beam3.372 mDraft1.992 mDisplacement4,491 kgDLR6.6185IMS DivisionCruiser/RacerDynamic Allowance0.230%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight500 kgMinimum weight375 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail34.8235.58Headsail Luffed26.3926.39Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail10.06Storm Jib8.68Heavy Weather Jib23.42
SAIL LIMITS
Headsails5  Spinnakers0 * No 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  03440002IF8Issued on 19/04/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
2023

Boat

Lethe

NOR 12488

Norges Seilforbund
Sognsveien 73
0854 OSLO
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG1051.9870.7781.0745.1731.5725.7729.0
52°692.1589.8542.5522.7514.8510.5507.9
60°658.1568.6528.3509.3500.1495.3491.3
75°636.7554.5518.0497.1483.1473.8464.8
90°649.1558.0517.6494.7476.8462.1442.2
110°730.6601.0535.9503.3480.5460.6426.5
120°777.3629.9552.4513.3488.6467.5430.0
135°891.6702.5599.4540.5507.8485.0446.1
150°1052.3811.6682.0598.4546.0514.6472.8
Run VMG1215.1937.1767.2658.4584.8537.3485.8
Selected Courses
Windward / Leeward1133.5903.9774.1701.7658.2631.5607.4
All purpose862.9703.6620.5575.5548.9531.6510.8
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward737.60.8135
All purpose598.81.0021
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7453
Downwind "popa"0.8099
70% up, 30% down "Ilhabela"0.7636
30% up, 70% down "Ilhabela-inverso"0.7894
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Predominantly Upwind634.00.9464
Predominantly Downwind624.60.9607
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low783.30.7660
Triple Number All Purpose Medium594.51.0092
Triple Number All Purpose High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Predominantly Upwind634.00.9464
Predominantly Downwind624.60.9607
Predominantly Upwind Low838.50.7155
Predominantly Upwind Medium643.60.9323
Predominantly Upwind High607.50.9876
Predominantly Downwind Low901.90.6653
Predominantly Downwind Medium627.80.9557
Predominantly Downwind High507.91.1812
Chicago-Mac Upwind0.9299
Chicago-Mac All Purpose0.9344
Chicago-Mac Downwind0.9410
Bayview-Mac Cove Island0.8710
Bayview-Mac Shore0.8886
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching568.01.0563
Predominantly Reaching Low713.30.8412
Predominantly Reaching Medium566.11.0600
Predominantly Reaching High494.81.2127
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1115.90.5377
5-Band Low / Medium925.20.6485
5-Band Medium717.40.8363
5-Band Medium / High637.90.9406
5-Band High611.60.9811
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance654.8
Triple Number Coastal/Long Distance Low783.3
Triple Number Coastal/Long Distance Medium594.5
Triple Number Coastal/Long Distance High528.2
Triple Number Windward/Leeward Low1018.7
Triple Number Windward/Leeward Medium731.8
Triple Number Windward/Leeward High629.1
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7660
Triple Number Coastal/Long Distance Medium1.0092
Triple Number Coastal/Long Distance High1.1360
Triple Number Windward/Leeward Low0.5890
Triple Number Windward/Leeward Medium0.8199
Triple Number Windward/Leeward High0.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low783.3
Triple Number Coastal/Long Distance Medium594.5
Triple Number Coastal/Long Distance High528.2
Triple Number Windward/Leeward Low1018.7
Triple Number Windward/Leeward Medium731.8
Triple Number Windward/Leeward High629.1
Predominantly Upwind634.0
Predominantly Downwind624.6
Predominantly Reaching589.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7660
Triple Number Coastal/Long Distance Medium1.0092
Triple Number Coastal/Long Distance High1.1360
Triple Number Windward/Leeward Low0.5890
Triple Number Windward/Leeward Medium0.8199
Triple Number Windward/Leeward High0.9537
Coastal/Long Distance0.9163
Predominantly Upwind0.9464
Predominantly Downwind0.9607
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7660
Tretall Distanseseilas Mellomvind1.0092
Tretall Distanseseilas Mye vind1.1360
Tretall Pølsebane Lite vind0.5890
Tretall Pølsebane Mellomvind0.8199
Tretall Pølsebane Mye vind0.9537
Distanseseilas ett tall (OSN 8-16kn)0.9163
Distanseseilas ett tall (APH 6-20kn)1.0021
Enkeltall Motvind0.9464
Enkeltall Medvind0.9607
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Coastal/Long Distance654.80.9163
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind634.00.9464
Predominantly Downwind624.60.9607
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore614.60.9762
Cape Doctor Coastal517.11.1604
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7660
Triple Number Coastal/Long Distance Medium1.0092
Triple Number Coastal/Long Distance High1.1360
Triple Number Windward/Leeward Low0.5890
Triple Number Windward/Leeward Medium0.8199
Triple Number Windward/Leeward High0.9537
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7660
Triple Number Coastal/Long Distance Medium1.0092
Triple Number Coastal/Long Distance High1.1360
Triple Number Windward/Leeward Low0.5890
Triple Number Windward/Leeward Medium0.8199
Triple Number Windward/Leeward High0.9537
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Predominantly Upwind634.00.9464
Predominantly Downwind624.60.9607
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance654.80.9163
Triple Number Coastal/Long Distance Low783.30.7660
Triple Number Coastal/Long Distance Medium594.51.0092
Triple Number Coastal/Long Distance High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1141.7851.5699.4614.9570.5537.9487.5
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low783.30.7660
Triple Number All Purpose Medium594.51.0092
Triple Number All Purpose High528.21.1360
Triple Number Windward/Leeward Low1018.70.5890
Triple Number Windward/Leeward Medium731.80.8199
Triple Number Windward/Leeward High629.10.9537
Predominantly Upwind634.00.9464
Predominantly Downwind624.60.9607
Predominantly Upwind Low838.50.7155
Predominantly Upwind Medium643.60.9323
Predominantly Upwind High607.50.9876
Predominantly Downwind Low901.90.6653
Predominantly Downwind Medium627.80.9557
Predominantly Downwind High507.91.1812
Chicago-Mac Upwind0.9299
Chicago-Mac All Purpose0.9344
Chicago-Mac Downwind0.9410
Bayview-Mac Cove Island0.8710
Bayview-Mac Shore0.8886
Harvest Moon Regatta520.51.1528
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy621.10.9660
San Francisco Bay Medium727.40.8248
Predominantly Reaching568.01.0563
Predominantly Reaching Low713.30.8412
Predominantly Reaching Medium566.11.0600
Predominantly Reaching High494.81.2127
Windward/Leeward 60-40 Low1007.30.5957
Windward/Leeward 60-40 Medium742.90.8077
Windward/Leeward 60-40 High662.90.9051
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1115.90.5377
5-Band Low / Medium925.20.6485
5-Band Medium717.40.8363
5-Band Medium / High637.90.9406
5-Band High611.60.9811
ORC Ref  03440002IF8Issued on 19/04/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
2023

Boat

Lethe

NOR 12488

Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassFirst 34.7MeasurementHINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA9.980Max. Beam3.372Draft1.992Displacement4,491Wetted area21.90IMS L9.027LSM08.786Acc. length9.982Sink (kg/mm) 16.29
VCGD-0.110VCGM-0.088RM Rated (kg·m) 101.1Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0034
EDL1.780ST10.050ST20.170
ST30.170ST40.170ST50.270
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P12.800IG13.170ISP13.900MDT10.100MDL10.180MDT20.100MDL20.150TL1.200MW0.150GO0.150
E4.490J3.670BAS1.540FSDFoilSFJ0.000SPL0.000WPLTPS5.100BDMWT110.00MCG4.780
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.110Flotation Date01/01/2015MeasurerComment
SFFP0.172FFMFF1.304LCFcl5.369SG1.0140
SAFP9.530FAMFA1.052LCFsh5.611HBI1.169
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03440002IF8Issued on 19/04/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
Non Spinnaker
2023

Boat

Lethe

NOR 12488

Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment336-2022022510570.321.061.782.933.7634.8225/02/2022
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment336-2022022511010.090.631.142.062.913.7813.19NoNo 26.3925/02/2022306-2018012309030.080.561.071.972.853.7312.93NoNo 25.0723/01/20183 medium306-2019091112090.100.470.921.772.603.4012.30NoNo 21.5211/09/20193Di 360 RAW336-2022080114030.090.400.731.472.343.3011.33NoNo 17.7501/08/2022
ORC Ref  03440002IF8Issued on 19/04/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org