International
Certificate
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°39.6°39.0°38.8°38.8°39.4°
Beat VMG3.414.114.584.784.874.914.88
52°5.186.086.616.856.957.017.04
60°5.456.316.797.047.167.237.28
75°5.756.627.017.227.427.557.69
90°5.976.817.257.537.717.848.08
110°5.806.797.307.677.958.268.80
120°5.656.707.267.698.088.448.96
135°5.106.266.997.457.888.339.39
150°4.345.456.366.937.277.578.21
Run VMG3.764.725.506.006.346.857.54
Gybe Angles144.4°148.0°149.2°150.1°169.4°175.4°176.3°

APH: 568.6

CDL: 8.470

GPH: 633.3

CertNo: 12488

BOAT
ClassFirst 34.7DesignerB.FarrBuilderBeneteauAge date01/2008Series date01/2004Offset fileFIRST347.offData fileNOR12488INT
HULL
Length Overall9.980 mMaximum Beam3.372 mDraft1.998 mDisplacement4,594 kgDLR6.6667IMS DivisionCruiser/RacerDynamic Allowance0.180%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.405m
CREW
Maximum weight500 kgMinimum weight375 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail34.8435.61Headsail Luffed26.3926.39Headsail FlyingSymmetricAsymmetric99.3699.36 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail10.07Storm Jib8.85Heavy Weather Jib23.87
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment96.3 kg·mStability Index123.7
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  03440002LN6Issued on 15/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
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 VMG1056.1875.0786.6752.4739.0733.5737.1
52°694.6592.1544.8525.5517.9513.8511.4
60°660.1570.3529.8511.3502.9498.2494.6
75°626.4544.2513.3498.4485.1476.7468.4
90°603.5528.6496.9478.3467.1459.1445.4
110°621.2529.9493.0469.6452.7435.8409.3
120°636.7537.3495.9468.2445.4426.5402.0
135°705.6574.8515.2483.5456.8432.4383.2
150°830.1660.2566.5519.8495.3475.5438.2
Run VMG958.5762.3654.1600.1567.6525.5477.3
Selected Courses
Windward / Leeward1007.3818.7720.3676.2653.3629.5607.2
All purpose774.9644.4581.5551.3533.6519.4500.7
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward703.10.8533
All purpose568.61.0553
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7395
Downwind "popa"0.9240
70% up, 30% down "Ilhabela"0.7866
30% up, 70% down "Ilhabela-inverso"0.8597
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Predominantly Upwind617.60.9715
Predominantly Downwind569.51.0535
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low709.60.8455
Triple Number All Purpose Medium564.71.0625
Triple Number All Purpose High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Predominantly Upwind617.60.9715
Predominantly Downwind569.51.0535
Predominantly Upwind Low800.00.7500
Predominantly Upwind Medium641.80.9349
Predominantly Upwind High610.00.9836
Predominantly Downwind Low763.10.7863
Predominantly Downwind Medium564.71.0625
Predominantly Downwind High484.31.2388
Chicago-Mac Upwind0.9552
Chicago-Mac All Purpose0.9937
Chicago-Mac Downwind1.0373
Bayview-Mac Cove Island0.9305
Bayview-Mac Shore0.9341
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching535.01.1215
Predominantly Reaching Low637.00.9419
Predominantly Reaching Medium528.61.1350
Predominantly Reaching High474.81.2637
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low992.80.6044
5-Band Low / Medium839.60.7147
5-Band Medium687.70.8725
5-Band Medium / High633.80.9467
5-Band High611.10.9819
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance617.8
Triple Number Coastal/Long Distance Low709.6
Triple Number Coastal/Long Distance Medium564.7
Triple Number Coastal/Long Distance High516.0
Triple Number Windward/Leeward Low913.0
Triple Number Windward/Leeward Medium697.1
Triple Number Windward/Leeward High627.1
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8455
Triple Number Coastal/Long Distance Medium1.0625
Triple Number Coastal/Long Distance High1.1629
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8607
Triple Number Windward/Leeward High0.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low709.6
Triple Number Coastal/Long Distance Medium564.7
Triple Number Coastal/Long Distance High516.0
Triple Number Windward/Leeward Low913.0
Triple Number Windward/Leeward Medium697.1
Triple Number Windward/Leeward High627.1
Predominantly Upwind617.6
Predominantly Downwind569.5
Predominantly Reaching546.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8455
Triple Number Coastal/Long Distance Medium1.0625
Triple Number Coastal/Long Distance High1.1629
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8607
Triple Number Windward/Leeward High0.9568
Coastal/Long Distance0.9713
Predominantly Upwind0.9715
Predominantly Downwind1.0535
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8455
Tretall Distanseseilas Mellomvind1.0625
Tretall Distanseseilas Mye vind1.1629
Tretall Pølsebane Lite vind0.6572
Tretall Pølsebane Mellomvind0.8607
Tretall Pølsebane Mye vind0.9568
Distanseseilas ett tall (OSN 8-16kn)0.9713
Distanseseilas ett tall (APH 6-20kn)1.0553
Enkeltall Motvind0.9715
Enkeltall Medvind1.0535
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Coastal/Long Distance617.80.9713
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind617.60.9715
Predominantly Downwind569.51.0535
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore613.90.9774
Cape Doctor Coastal506.31.1851
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8455
Triple Number Coastal/Long Distance Medium1.0625
Triple Number Coastal/Long Distance High1.1629
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8607
Triple Number Windward/Leeward High0.9568
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8455
Triple Number Coastal/Long Distance Medium1.0625
Triple Number Coastal/Long Distance High1.1629
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8607
Triple Number Windward/Leeward High0.9568
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Predominantly Upwind617.60.9715
Predominantly Downwind569.51.0535
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance617.80.9713
Triple Number Coastal/Long Distance Low709.60.8455
Triple Number Coastal/Long Distance Medium564.71.0625
Triple Number Coastal/Long Distance High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1002.4769.8651.7588.5554.3524.4478.5
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low709.60.8455
Triple Number All Purpose Medium564.71.0625
Triple Number All Purpose High516.01.1629
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium697.10.8607
Triple Number Windward/Leeward High627.10.9568
Predominantly Upwind617.60.9715
Predominantly Downwind569.51.0535
Predominantly Upwind Low800.00.7500
Predominantly Upwind Medium641.80.9349
Predominantly Upwind High610.00.9836
Predominantly Downwind Low763.10.7863
Predominantly Downwind Medium564.71.0625
Predominantly Downwind High484.31.2388
Chicago-Mac Upwind0.9552
Chicago-Mac All Purpose0.9937
Chicago-Mac Downwind1.0373
Bayview-Mac Cove Island0.9305
Bayview-Mac Shore0.9341
Harvest Moon Regatta494.21.2141
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy610.10.9834
San Francisco Bay Medium685.70.8750
Predominantly Reaching535.01.1215
Predominantly Reaching Low637.00.9419
Predominantly Reaching Medium528.61.1350
Predominantly Reaching High474.81.2637
Windward/Leeward 60-40 Low923.50.6497
Windward/Leeward 60-40 Medium722.10.8309
Windward/Leeward 60-40 High664.20.9033
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low992.80.6044
5-Band Low / Medium839.60.7147
5-Band Medium687.70.8725
5-Band Medium / High633.80.9467
5-Band High611.10.9819
ORC Ref  03440002LN6Issued on 15/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Lethe

NOR 12488

Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassFirst 34.7Measurement02/04/2022HINFR-BEYF6138J708Plan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA9.980Max. Beam3.372Draft1.998Displacement4,594Wetted area22.08IMS L9.063LSM08.832Acc. length9.982Sink (kg/mm) 16.45
VCGD-0.024VCGM-0.008RM Rated (kg·m) 96.3Limit of positive stability(°) 124.2Stability Index123.7
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.405PBW0.120PIPA0.0033
EDL1.770ST10.042ST20.180
ST30.180ST40.112ST50.270
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P12.810IG13.170ISP13.750MDT10.114MDL10.164MDT20.107MDL20.134TL0.995MW0.164GO0.199
E4.490J3.670BAS1.540FSD0.035SFJ0.000SPL0.000WPLTPS5.100BDMWT95.30MCG5.700
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date24/04/2022MeasurerPBComment
SFFP0.172FFM1.303FF1.305LCFcl5.387SG1.0190
SAFP9.530FAM1.038FA1.040LCFsh5.629HBI1.165
W165.7W265.7W365.7W465.7
PD1594.5PD2589.8PD3600.2PD4606.9
WD11.040PLM9000.00GSA1.0RSA1.0RM95.6
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG4DieselFuel6057.200.103Water heaterWater2507.052Holding tankWater9002.601WaterWater10004.20Total deductible47.200.10
OTHER ITEMSIdKindDescriptionWeightLCGVCG3BatteryStart battery lead253.302Battery100ah Lifepeo133.701EngineYanmar Ym20Total deductible0
ORC Ref  03440002LN6Issued on 15/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Lethe

NOR 12488

Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment336-2022022510570.321.061.782.933.7634.8425/02/2022
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
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment306-20230415124715.5013.1014.308.408.09104%99.3615/04/2023A2 2023306-20170808130415.2212.4213.828.187.58108%92.8208/08/20171-20170810122915.0212.4913.767.516.69112%84.2010/08/2017Mål fra 1Sails sverige336-20220309124113.8712.0712.975.367.0576%61.5909/03/2022
ORC Ref  03440002LN6Issued on 15/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org