Club Certificate2025
Madam LarsenNOR 7213
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 Angles43.6°43.6°41.6°39.9°38.4°37.8°37.7°38.0°39.3°
Beat VMG2.263.113.754.224.504.624.674.684.58
52°3.544.745.576.066.336.476.536.596.57
60°3.764.995.796.216.476.636.716.806.81
75°3.875.125.926.346.616.826.997.167.24
90°3.735.015.916.436.746.937.127.477.67
110°3.644.985.966.506.867.197.497.918.22
120°3.484.795.796.406.797.147.498.218.89
135°3.044.245.256.086.556.917.278.059.29
150°2.473.594.615.506.186.596.937.628.51
Run VMG2.143.114.004.785.506.036.447.087.73
Gybe Angles147.4°147.4°151.6°153.6°161.8°168.2°177.2°178.1°177.2°
APH ToD:626.9CDL: 7.385APH ToT: 0.9570CertNo:5176
BOAT
ClassLARSEN 28DesignerHansÅgeLarsenBuilderNyboatAge date01/1987Series date01/1985Offset fileLARS28.OFFData file5176
HULL
Length Overall8.823 mMaximum Beam2.648 mDraft1.538 mDisplacement2,716 kgDLR6.2822IMS DivisionCruiser/RacerDynamic Allowance0.270%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.340m
CREW
Maximum weight462 kg(default)Minimum weight332 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail22.4022.79Headsail Luffed22.2722.27Headsail FlyingSymmetric48.5248.52Asymmetric
STORM SAIL AREAS (m²)
Trysail6.80Storm Jib4.64Heavy Weather Jib12.52
SAIL LIMITS
Headsails5Spinnakers4
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.
Club Certificate2025
Madam LarsenNOR 7213
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 VMG1590.01159.2959.0853.8799.4779.6770.1768.8786.0
52°1017.1758.9646.1594.4568.7556.5551.1546.5548.0
60°957.7721.8622.3579.3556.2542.7536.3529.7529.0
75°929.6702.8608.0567.6544.7527.6515.1503.0497.0
90°966.0718.3609.4559.7534.2519.7506.0482.0469.6
110°988.2722.7604.2554.2524.8500.4480.4455.1437.8
120°1035.2751.6621.8562.5530.5504.0480.4438.7404.9
135°1186.0849.1685.3592.1549.9521.2495.4447.0387.6
150°1455.81003.5780.8654.9582.5546.2519.4472.4423.2
Run VMG1685.91158.8900.3753.6654.8596.7558.7508.2465.9
Selected Courses
Windward / Leeward1635.61159.0929.7803.7727.1688.2664.4638.5626.0
All purpose1232.1890.9731.3649.1603.1578.0560.6537.2521.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward765.80.7835
All purpose626.90.9570
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6897
Downwind "popa"0.8185
70% up, 30% down "Ilhabela"0.7239
30% up, 70% down "Ilhabela-inverso"0.7751
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Predominantly Upwind675.90.8877
Predominantly Downwind639.80.9379
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low811.10.7397
Triple Number AP Medium622.90.9632
Triple Number AP High556.21.0788
Triple Number Windward/Leeward Low1091.10.5499
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Single Number Predominant Upwind703.00.8535
Single Number Predominant Reaching626.80.9573
Single Number Predominant Downwind669.00.8968
Predominant Upwind - Low969.00.6192
Predominant Upwind - Low/Med741.90.8087
Predominant Upwind - Medium653.30.9184
Predominant Upwind - Med/High611.30.9815
Predominant Upwind - High595.51.0075
Predominant Downwind Low993.50.6039
Predominant Downwind Low/Med728.70.8233
Predominant Downwind Medium615.30.9751
Predominant Downwind Med/High548.11.0947
Predominant Downwind High509.01.1787
Predominant Reaching Low874.60.6861
Predominant Reaching Low/Med666.80.8998
Predominant Reaching Medium584.51.0265
Predominant Reaching Med/High538.01.1152
Predominant Reaching High509.61.1773
SA/DSPL Upwind22.87SA/DSPL Downwind36.31
Scoring OptionTODTOT
5-Band Windward/Leeward Low1221.40.4912
5-Band Windward/Leeward Low/Med889.10.6748
5-Band Windward/Leeward Medium745.10.8052
5-Band Windward/Leeward Med/High669.30.8964
5-Band Windward/Leeward High640.80.9363
Windward/Leeward 60-40 Low1220.50.4916
Windward/Leeward 60-40 Low/Med896.90.6690
Windward/Leeward 60-40 Medium759.30.7902
Windward/Leeward 60-40 Med/High690.30.8692
Windward/Leeward 60-40 High667.10.8995
5-Band AP Low898.70.6677
5-Band AP Low/Med706.90.8488
5-Band AP Medium613.70.9777
5-Band AP Med/High563.21.0654
5-Band AP High538.51.1142
5-Band SF Bay Tour - Low1050.20.5713
5-Band SF Bay Tour - Low/Med850.40.7055
5-Band SF Bay Tour - Medium721.50.8316
5-Band SF Bay Tour - Med/High655.40.9154
5-Band SF Bay Tour - High628.90.9541
Chicago-Mac Upwind0.8273
Chicago-Mac All Purpose0.8483
Chicago-Mac Downwind0.8633
Bayview-Mac Cove Island0.6181
Bayview-Mac Shore0.6232
Harvest Moon Regatta546.31.0983
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance681.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating681.50.8804
FinRating, kevyt tuuli1200.70.8328
FinRating, kova tuuli541.50.9234
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8804
Triple Number Coastal/Long Distance Low0.7397
Triple Number Coastal/Long Distance Medium0.9634
Triple Number Coastal/Long Distance High1.0788
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.7897
Triple Number Windward/Leeward High0.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
For information
General Purpose Handicap (GPH)704.8
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low811.1
Triple Number Coastal/Long Distance Medium622.8
Triple Number Coastal/Long Distance High556.2
Triple Number Windward/Leeward Low1044.4
Triple Number Windward/Leeward Medium759.8
Triple Number Windward/Leeward High660.6
Predominantly Upwind675.9
Predominantly Downwind639.8
Predominantly Reaching613.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7397
Triple Number Coastal/Long Distance Medium0.9634
Triple Number Coastal/Long Distance High1.0788
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.7897
Triple Number Windward/Leeward High0.9082
Coastal/Long Distance0.8804
Predominantly Upwind0.8877
Predominantly Downwind0.9379
For information
General Purpose Handicap (GPH)704.8
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9570
Distanseseilas Trippeltall svak vind0.7397
Distanseseilas Trippeltall mellomvind0.9634
Distanseseilas Trippeltall sterk vind1.0788
Pølsebane Trippeltall svak vind0.5745
Pølsebane Trippeltall mellomvind0.7897
Pølsebane Trippeltall sterk vind0.9082
Motvind Singeltall0.8877
Medvind Singeltall0.9379
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Coastal/Long Distance681.50.8804
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind675.90.8877
Predominantly Downwind639.80.9379
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore629.70.9528
Cape Doctor Coastal526.01.1407
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7397
Triple Number Coastal/Long Distance Medium0.9634
Triple Number Coastal/Long Distance High1.0788
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.7897
Triple Number Windward/Leeward High0.9082
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7397
Triple Number Coastal/Long Distance Medium0.9634
Triple Number Coastal/Long Distance High1.0788
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.7897
Triple Number Windward/Leeward High0.9082
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Predominantly Upwind675.90.8877
Predominantly Downwind639.80.9379
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance681.50.8804
Triple Number Coastal/Long Distance Low811.10.7397
Triple Number Coastal/Long Distance Medium622.80.9634
Triple Number Coastal/Long Distance High556.21.0788
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1742.61159.0875.4727.7641.8599.6567.0513.4494.9
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low811.10.7397
Triple Number AP Medium622.90.9632
Triple Number AP High556.21.0788
Triple Number Windward/Leeward Low1091.10.5499
Triple Number Windward/Leeward Medium759.80.7897
Triple Number Windward/Leeward High660.60.9082
Single Number Predominant Upwind703.00.8535
Single Number Predominant Reaching626.80.9573
Single Number Predominant Downwind669.00.8968
Predominant Upwind - Low969.00.6192
Predominant Upwind - Low/Med741.90.8087
Predominant Upwind - Medium653.30.9184
Predominant Upwind - Med/High611.30.9815
Predominant Upwind - High595.51.0075
Predominant Downwind Low993.50.6039
Predominant Downwind Low/Med728.70.8233
Predominant Downwind Medium615.30.9751
Predominant Downwind Med/High548.11.0947
Predominant Downwind High509.01.1787
Predominant Reaching Low874.60.6861
Predominant Reaching Low/Med666.80.8998
Predominant Reaching Medium584.51.0265
Predominant Reaching Med/High538.01.1152
Predominant Reaching High509.61.1773
SA/DSPL Upwind22.87SA/DSPL Downwind36.31
Scoring OptionTODTOT
5-Band Windward/Leeward Low1221.40.4912
5-Band Windward/Leeward Low/Med889.10.6748
5-Band Windward/Leeward Medium745.10.8052
5-Band Windward/Leeward Med/High669.30.8964
5-Band Windward/Leeward High640.80.9363
Windward/Leeward 60-40 Low1220.50.4916
Windward/Leeward 60-40 Low/Med896.90.6690
Windward/Leeward 60-40 Medium759.30.7902
Windward/Leeward 60-40 Med/High690.30.8692
Windward/Leeward 60-40 High667.10.8995
5-Band AP Low898.70.6677
5-Band AP Low/Med706.90.8488
5-Band AP Medium613.70.9777
5-Band AP Med/High563.21.0654
5-Band AP High538.51.1142
5-Band SF Bay Tour - Low1050.20.5713
5-Band SF Bay Tour - Low/Med850.40.7055
5-Band SF Bay Tour - Medium721.50.8316
5-Band SF Bay Tour - Med/High655.40.9154
5-Band SF Bay Tour - High628.90.9541
Chicago-Mac Upwind0.8273
Chicago-Mac All Purpose0.8483
Chicago-Mac Downwind0.8633
Bayview-Mac Cove Island0.6181
Bayview-Mac Shore0.6232
Harvest Moon Regatta546.31.0983
Club Certificate2025
Madam LarsenNOR 7213
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassLARSEN 28MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA8.823Max. Beam2.648Draft1.538Displacement2,716Wetted area16.01IMS L7.792LSM07.561Acc. length8.606Sink (kg/mm) 12.28
VCGD-0.080VCGM-0.022RM Rated (kg·m) 53.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight462Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.340PBWPIPA0.0036
EDL0.770ST10.070ST20.180
ST30.180ST40.110ST50.300
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders1Rotating mastNo
P10.500IG9.600ISP9.600MDT10.100MDL10.130MDT20.090MDL20.090TL2.250MW0.130GO0.140
E3.700J3.380BAS1.130FSDFoilSFJ0.000SPL3.430WPLTPS0.000BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.080Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
Madam LarsenNOR 7213
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment5176-2004012412000.120.001.282.233.0022.4001/01/1753
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment5176-2004012412010.000.000.000.000.004.619.49NoNo 22.2701/01/1753
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment5176-2004012412029.439.439.430.000.0048.5201/01/1753
CRUISER/RACER REQUIREMENTS*
Accommodation length8.6 mTable area0.33 m²Headroom1.55 mMinimum number of berths3Personal gear stowage0.12 m³Fresh water capacity39 lMinimum number of seats in cockpit3Food stowage0.18 m³Fuel capacity22 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.