Non Spin/HSFClub Certificate2025
MweraRSA-1211
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
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 Angles44.5°44.5°42.5°41.1°40.3°39.6°39.3°39.4°40.8°
Beat VMG1.992.813.494.004.414.674.784.824.70
52°3.154.345.275.946.436.726.866.936.89
60°3.394.615.536.206.656.927.077.177.16
75°3.544.805.746.416.837.107.307.537.59
90°3.424.695.676.386.837.147.397.768.01
110°3.004.255.326.156.737.107.407.958.45
120°2.783.995.075.926.566.997.307.878.43
135°2.383.504.545.416.136.687.057.638.20
150°2.033.034.004.875.616.256.747.377.92
Run VMG1.762.633.494.305.055.716.307.097.64
Gybe Angles152.9°152.9°156.8°175.7°177.1°178.0°178.6°179.3°179.3°
APH ToD:652.9CDL: 8.006APH ToT: 0.9189CertNo:ZAN269
BOAT
ClassLavranos 34DesignerAngelo LavranosBuilderJohn Robertson YacAge date01/1987Series date01/1986Offset fileSA92031cor.offData fileRSA1211
HULL
Length Overall10.530 mMaximum Beam3.326 mDraft1.980 mDisplacement5,075 kgDLR6.1393IMS DivisionCruiser/RacerDynamic Allowance0.370%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeSolid 3 bladesDiameter0.220m
CREW
Maximum weight340 kg(declared)Minimum weight210 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail28.3728.77Headsail Luffed21.5521.55Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail8.63Storm Jib7.01Heavy Weather Jib18.91
SAIL LIMITS
Headsails1
✱ One set on the forestay
✱ Zero set flying
✱ Woven polyester sails
Spinnakers0
✱ 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.
Non Spin/HSFClub Certificate2025
MweraRSA-1211
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
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 VMG1807.71281.31030.7899.7816.6770.7752.4747.0765.5
52°1142.5829.3683.2606.1559.5535.4524.5519.2522.5
60°1062.4780.3650.4580.8541.5520.2509.2502.1502.8
75°1018.0750.1627.3561.9527.4506.9493.0477.9474.1
90°1054.1768.1634.8564.4527.1504.5487.3463.6449.5
110°1200.3847.4677.2585.5534.9506.7486.7453.0425.8
120°1293.9901.2710.8608.6548.5515.2493.3457.7427.0
135°1512.41028.9792.8665.7587.3539.1510.5471.9438.9
150°1773.21188.3900.0739.9641.8576.1534.4488.7454.8
Run VMG2047.31368.81031.6836.3713.0630.2571.7507.7471.0
Selected Courses
Windward / Leeward1925.41325.11031.1868.0764.8700.5662.1627.4618.2
All purpose1444.61012.1802.7689.3620.8579.7555.3529.9518.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward810.10.7407
All purpose652.90.9189
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6668
Downwind "popa"0.7421
70% up, 30% down "Ilhabela"0.6878
30% up, 70% down "Ilhabela-inverso"0.7178
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Predominantly Upwind697.40.8603
Predominantly Downwind683.60.8777
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low907.40.6613
Triple Number AP Medium648.60.9250
Triple Number AP High551.91.0872
Triple Number Windward/Leeward Low1236.70.4852
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Single Number Predominant Upwind730.80.8210
Single Number Predominant Reaching658.30.9115
Single Number Predominant Downwind723.10.8297
Predominant Upwind - Low1085.50.5527
Predominant Upwind - Low/Med792.90.7567
Predominant Upwind - Medium666.70.9000
Predominant Upwind - Med/High599.61.0007
Predominant Upwind - High580.21.0341
Predominant Downwind Low1161.00.5168
Predominant Downwind Low/Med808.50.7421
Predominant Downwind Medium649.90.9232
Predominant Downwind Med/High554.01.0830
Predominant Downwind High511.91.1720
Predominant Reaching Low993.00.6043
Predominant Reaching Low/Med719.00.8345
Predominant Reaching Medium600.50.9992
Predominant Reaching Med/High532.81.1261
Predominant Reaching High504.01.1904
SA/DSPL Upwind16.81SA/DSPL Downwind16.81
Scoring OptionTODTOT
5-Band Windward/Leeward Low1402.20.4279
5-Band Windward/Leeward Low/Med977.60.6137
5-Band Windward/Leeward Medium784.90.7645
5-Band Windward/Leeward Med/High671.40.8937
5-Band Windward/Leeward High631.80.9497
Windward/Leeward 60-40 Low1391.80.4311
Windward/Leeward 60-40 Low/Med980.00.6122
Windward/Leeward 60-40 Medium795.00.7548
Windward/Leeward 60-40 Med/High689.10.8707
Windward/Leeward 60-40 High655.70.9151
5-Band AP Low1028.50.5834
5-Band AP Low/Med766.70.7826
5-Band AP Medium635.00.9448
5-Band AP Med/High560.61.0702
5-Band AP High532.21.1273
5-Band SF Bay Tour - Low1193.30.5028
5-Band SF Bay Tour - Low/Med933.90.6425
5-Band SF Bay Tour - Medium757.80.7918
5-Band SF Bay Tour - Med/High657.10.9131
5-Band SF Bay Tour - High623.30.9626
Chicago-Mac Upwind0.7874
Chicago-Mac All Purpose0.7943
Chicago-Mac Downwind0.7913
Bayview-Mac Cove Island0.5480
Bayview-Mac Shore0.5540
Harvest Moon Regatta556.91.0774
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance715.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating715.00.8392
FinRating, kevyt tuuli1383.60.7227
FinRating, kova tuuli536.60.9317
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8392
Triple Number Coastal/Long Distance Low0.6613
Triple Number Coastal/Long Distance Medium0.9252
Triple Number Coastal/Long Distance High1.0872
Triple Number Windward/Leeward Low0.5093
Triple Number Windward/Leeward Medium0.7451
Triple Number Windward/Leeward High0.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
For information
General Purpose Handicap (GPH)746.3
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low907.3
Triple Number Coastal/Long Distance Medium648.5
Triple Number Coastal/Long Distance High551.9
Triple Number Windward/Leeward Low1178.1
Triple Number Windward/Leeward Medium805.3
Triple Number Windward/Leeward High658.7
Predominantly Upwind697.4
Predominantly Downwind683.6
Predominantly Reaching645.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6613
Triple Number Coastal/Long Distance Medium0.9252
Triple Number Coastal/Long Distance High1.0872
Triple Number Windward/Leeward Low0.5093
Triple Number Windward/Leeward Medium0.7451
Triple Number Windward/Leeward High0.9109
Coastal/Long Distance0.8392
Predominantly Upwind0.8603
Predominantly Downwind0.8777
For information
General Purpose Handicap (GPH)746.3
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9189
Distanseseilas Trippeltall svak vind0.6613
Distanseseilas Trippeltall mellomvind0.9252
Distanseseilas Trippeltall sterk vind1.0872
Pølsebane Trippeltall svak vind0.5093
Pølsebane Trippeltall mellomvind0.7451
Pølsebane Trippeltall sterk vind0.9109
Motvind Singeltall0.8603
Medvind Singeltall0.8777
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Coastal/Long Distance715.00.8392
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind697.40.8603
Predominantly Downwind683.60.8777
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore621.00.9662
Cape Doctor Coastal521.61.1504
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6613
Triple Number Coastal/Long Distance Medium0.9252
Triple Number Coastal/Long Distance High1.0872
Triple Number Windward/Leeward Low0.5093
Triple Number Windward/Leeward Medium0.7451
Triple Number Windward/Leeward High0.9109
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6613
Triple Number Coastal/Long Distance Medium0.9252
Triple Number Coastal/Long Distance High1.0872
Triple Number Windward/Leeward Low0.5093
Triple Number Windward/Leeward Medium0.7451
Triple Number Windward/Leeward High0.9109
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Predominantly Upwind697.40.8603
Predominantly Downwind683.60.8777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance715.00.8392
Triple Number Coastal/Long Distance Low907.30.6613
Triple Number Coastal/Long Distance Medium648.50.9252
Triple Number Coastal/Long Distance High551.91.0872
Triple Number Windward/Leeward Low1178.10.5093
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2075.31329.4969.7780.1664.4602.1561.4507.0491.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low907.40.6613
Triple Number AP Medium648.60.9250
Triple Number AP High551.91.0872
Triple Number Windward/Leeward Low1236.70.4852
Triple Number Windward/Leeward Medium805.30.7451
Triple Number Windward/Leeward High658.70.9109
Single Number Predominant Upwind730.80.8210
Single Number Predominant Reaching658.30.9115
Single Number Predominant Downwind723.10.8297
Predominant Upwind - Low1085.50.5527
Predominant Upwind - Low/Med792.90.7567
Predominant Upwind - Medium666.70.9000
Predominant Upwind - Med/High599.61.0007
Predominant Upwind - High580.21.0341
Predominant Downwind Low1161.00.5168
Predominant Downwind Low/Med808.50.7421
Predominant Downwind Medium649.90.9232
Predominant Downwind Med/High554.01.0830
Predominant Downwind High511.91.1720
Predominant Reaching Low993.00.6043
Predominant Reaching Low/Med719.00.8345
Predominant Reaching Medium600.50.9992
Predominant Reaching Med/High532.81.1261
Predominant Reaching High504.01.1904
SA/DSPL Upwind16.81SA/DSPL Downwind16.81
Scoring OptionTODTOT
5-Band Windward/Leeward Low1402.20.4279
5-Band Windward/Leeward Low/Med977.60.6137
5-Band Windward/Leeward Medium784.90.7645
5-Band Windward/Leeward Med/High671.40.8937
5-Band Windward/Leeward High631.80.9497
Windward/Leeward 60-40 Low1391.80.4311
Windward/Leeward 60-40 Low/Med980.00.6122
Windward/Leeward 60-40 Medium795.00.7548
Windward/Leeward 60-40 Med/High689.10.8707
Windward/Leeward 60-40 High655.70.9151
5-Band AP Low1028.50.5834
5-Band AP Low/Med766.70.7826
5-Band AP Medium635.00.9448
5-Band AP Med/High560.61.0702
5-Band AP High532.21.1273
5-Band SF Bay Tour - Low1193.30.5028
5-Band SF Bay Tour - Low/Med933.90.6425
5-Band SF Bay Tour - Medium757.80.7918
5-Band SF Bay Tour - Med/High657.10.9131
5-Band SF Bay Tour - High623.30.9626
Chicago-Mac Upwind0.7874
Chicago-Mac All Purpose0.7943
Chicago-Mac Downwind0.7913
Bayview-Mac Cove Island0.5480
Bayview-Mac Shore0.5540
Harvest Moon Regatta556.91.0774
Non Spin/HSFClub Certificate2025
MweraRSA-1211
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassLavranos 34Measurement05/12/2024HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.530Max. Beam3.326Draft1.980Displacement5,075Wetted area24.00IMS L9.324LSM09.384Acc. length10.383Sink (kg/mm) 18.04
VCGD0.054VCGM0.062RM Rated (kg·m) 105.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight629Declared crew weight340
PROPELLER
Propeller TypeSolid 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.220PBW0.128PIPA0.0089
PSD0.025PHD0.050PHL0.070
PSA25.0°ESL0.875
ST10.016ST20.096ST30.110
ST40.050ST50.190
RIG
Forestay tensionAftInner stayNone FittedMast materialSingle headsail furlerYesMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P12.265IG11.470ISP11.530MDT10.115MDL10.202MDT20.073MDL20.130TL2.255MW0.130GO0.240
E4.020J3.580BAS1.460FSD0.034SFJ0.015SPL3.720WPLTPSBD0.140MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date08/12/2024
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
MweraRSA-1211
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.160.771.412.463.3028.3712/10/2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.060.500.951.953.014.0810.78NoNo 21.5512/10/2024
CRUISER/RACER REQUIREMENTS*
Accommodation length10.4 mTable area0.44 m²Headroom1.73 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity88 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity58 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.