Non Spin/HSFClub Certificate2025
GIGIRSA-4387
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 Angles42.4°42.4°39.7°37.6°36.0°35.8°35.5°35.4°36.6°
Beat VMG2.663.654.434.975.215.335.405.475.40
52°4.115.496.436.947.177.297.377.487.49
60°4.365.756.627.097.367.507.617.757.80
75°4.525.916.747.197.567.848.018.248.35
90°4.375.786.697.197.577.968.318.779.05
110°3.735.156.256.957.407.858.309.3710.31
120°3.454.825.946.737.227.658.109.1410.66
135°2.884.155.286.186.847.287.708.589.78
150°2.373.494.545.446.216.797.217.978.87
Run VMG2.073.023.934.845.656.376.917.728.57
Gybe Angles144.9°144.9°146.9°173.9°175.7°177.1°178.6°178.6°177.5°
APH ToD:570.7CDL: 9.292APH ToT: 1.0513CertNo:ZANC060
BOAT
ClassMOUNT GAY 30DesignerDUDLEY DIXBuilderYILDUN YACHTSAge date01/2012Series date01/2012Offset fileMG30.offData fileRSA4387
HULL
Length Overall9.600 mMaximum Beam3.238 mDraft2.240 mDisplacement3,209 kgDLR4.4280IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.422%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight591 kg(default)Minimum weight461 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail37.3238.25Headsail Luffed21.9821.98Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail10.42Storm Jib6.84Heavy Weather Jib18.47
SAIL LIMITS
Headsails5
✱ Zero set flying
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.
Non Spin/HSFClub Certificate2025
GIGIRSA-4387
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 VMG1355.5986.0812.9723.8690.6675.9666.7658.7666.9
52°875.6655.3560.1518.6502.0494.1488.5481.4480.4
60°825.3626.2543.7508.1489.2479.9473.1464.5461.5
75°796.9609.4533.8500.4476.0459.1449.6436.9431.0
90°824.3622.4537.8501.0475.3452.2433.0410.5397.8
110°965.6698.8575.9518.3486.2458.8433.8384.2349.3
120°1043.6746.8606.2534.7498.4470.3444.5393.8337.7
135°1249.0868.0682.4582.2526.5494.3467.8419.4368.2
150°1520.31031.8792.6661.7579.7529.8499.6451.8406.0
Run VMG1740.01191.4915.2744.5637.2565.5520.6466.1419.8
Selected Courses
Windward / Leeward1545.71088.7864.0734.2663.9620.7593.7562.4543.4
All purpose1152.2827.6673.9593.4549.7522.0502.6474.2453.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward698.50.8590
All purpose570.71.0513
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8054
Downwind "popa"0.8332
70% up, 30% down "Ilhabela"0.8136
30% up, 70% down "Ilhabela-inverso"0.8247
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Predominantly Upwind601.10.9982
Predominantly Downwind602.00.9968
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low750.70.7992
Triple Number AP Medium567.81.0568
Triple Number AP High496.81.2077
Triple Number Windward/Leeward Low1020.50.5879
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Single Number Predominant Upwind623.70.9620
Single Number Predominant Reaching571.31.0502
Single Number Predominant Downwind631.60.9500
Predominant Upwind - Low864.00.6944
Predominant Upwind - Low/Med659.00.9105
Predominant Upwind - Medium580.31.0339
Predominant Upwind - Med/High539.71.1116
Predominant Upwind - High521.01.1516
Predominant Downwind Low970.90.6180
Predominant Downwind Low/Med697.90.8597
Predominant Downwind Medium576.71.0404
Predominant Downwind Med/High501.41.1966
Predominant Downwind High459.81.3048
Predominant Reaching Low811.50.7393
Predominant Reaching Low/Med613.70.9777
Predominant Reaching Medium532.11.1276
Predominant Reaching Med/High480.91.2476
Predominant Reaching High451.11.3301
SA/DSPL Upwind27.15SA/DSPL Downwind27.15
Scoring OptionTODTOT
5-Band Windward/Leeward Low1147.30.5230
5-Band Windward/Leeward Low/Med821.80.7301
5-Band Windward/Leeward Medium679.10.8835
5-Band Windward/Leeward Med/High598.81.0019
5-Band Windward/Leeward High564.51.0629
Windward/Leeward 60-40 Low1124.90.5334
Windward/Leeward 60-40 Low/Med815.20.7360
Windward/Leeward 60-40 Medium683.60.8777
Windward/Leeward 60-40 Med/High612.90.9790
Windward/Leeward 60-40 High583.91.0276
5-Band AP Low845.40.7097
5-Band AP Low/Med649.80.9233
5-Band AP Medium558.71.0739
5-Band AP Med/High505.11.1880
5-Band AP High475.61.2617
5-Band SF Bay Tour - Low977.00.6141
5-Band SF Bay Tour - Low/Med781.30.7680
5-Band SF Bay Tour - Medium655.70.9151
5-Band SF Bay Tour - Med/High587.01.0221
5-Band SF Bay Tour - High555.41.0802
Chicago-Mac Upwind0.9329
Chicago-Mac All Purpose0.9268
Chicago-Mac Downwind0.9098
Bayview-Mac Cove Island0.6644
Bayview-Mac Shore0.6730
Harvest Moon Regatta497.51.2060
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance623.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9620
Triple Number Coastal/Long Distance Low0.7992
Triple Number Coastal/Long Distance Medium1.0569
Triple Number Coastal/Long Distance High1.2077
Triple Number Windward/Leeward Low0.6145
Triple Number Windward/Leeward Medium0.8656
Triple Number Windward/Leeward High1.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
For information
General Purpose Handicap (GPH)644.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low750.8
Triple Number Coastal/Long Distance Medium567.7
Triple Number Coastal/Long Distance High496.8
Triple Number Windward/Leeward Low976.4
Triple Number Windward/Leeward Medium693.2
Triple Number Windward/Leeward High588.7
Predominantly Upwind601.1
Predominantly Downwind602.0
Predominantly Reaching565.9
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7992
Triple Number Coastal/Long Distance Medium1.0569
Triple Number Coastal/Long Distance High1.2077
Triple Number Windward/Leeward Low0.6145
Triple Number Windward/Leeward Medium0.8656
Triple Number Windward/Leeward High1.0192
Coastal/Long Distance0.9620
Predominantly Upwind0.9982
Predominantly Downwind0.9968
For information
General Purpose Handicap (GPH)644.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0513
Distanseseilas Trippeltall svak vind0.7992
Distanseseilas Trippeltall mellomvind1.0569
Distanseseilas Trippeltall sterk vind1.2077
Pølsebane Trippeltall svak vind0.6145
Pølsebane Trippeltall mellomvind0.8656
Pølsebane Trippeltall sterk vind1.0192
Motvind Singeltall0.9982
Medvind Singeltall0.9968
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Coastal/Long Distance623.70.9620
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind601.10.9982
Predominantly Downwind602.00.9968
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore549.11.0928
Cape Doctor Coastal459.71.3051
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7992
Triple Number Coastal/Long Distance Medium1.0569
Triple Number Coastal/Long Distance High1.2077
Triple Number Windward/Leeward Low0.6145
Triple Number Windward/Leeward Medium0.8656
Triple Number Windward/Leeward High1.0192
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7992
Triple Number Coastal/Long Distance Medium1.0569
Triple Number Coastal/Long Distance High1.2077
Triple Number Windward/Leeward Low0.6145
Triple Number Windward/Leeward Medium0.8656
Triple Number Windward/Leeward High1.0192
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Predominantly Upwind601.10.9982
Predominantly Downwind602.00.9968
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.70.9620
Triple Number Coastal/Long Distance Low750.80.7992
Triple Number Coastal/Long Distance Medium567.71.0569
Triple Number Coastal/Long Distance High496.81.2077
Triple Number Windward/Leeward Low976.40.6145
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1681.11099.0815.2666.1585.4541.9508.8454.3428.6
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low750.70.7992
Triple Number AP Medium567.81.0568
Triple Number AP High496.81.2077
Triple Number Windward/Leeward Low1020.50.5879
Triple Number Windward/Leeward Medium693.20.8656
Triple Number Windward/Leeward High588.71.0192
Single Number Predominant Upwind623.70.9620
Single Number Predominant Reaching571.31.0502
Single Number Predominant Downwind631.60.9500
Predominant Upwind - Low864.00.6944
Predominant Upwind - Low/Med659.00.9105
Predominant Upwind - Medium580.31.0339
Predominant Upwind - Med/High539.71.1116
Predominant Upwind - High521.01.1516
Predominant Downwind Low970.90.6180
Predominant Downwind Low/Med697.90.8597
Predominant Downwind Medium576.71.0404
Predominant Downwind Med/High501.41.1966
Predominant Downwind High459.81.3048
Predominant Reaching Low811.50.7393
Predominant Reaching Low/Med613.70.9777
Predominant Reaching Medium532.11.1276
Predominant Reaching Med/High480.91.2476
Predominant Reaching High451.11.3301
SA/DSPL Upwind27.15SA/DSPL Downwind27.15
Scoring OptionTODTOT
5-Band Windward/Leeward Low1147.30.5230
5-Band Windward/Leeward Low/Med821.80.7301
5-Band Windward/Leeward Medium679.10.8835
5-Band Windward/Leeward Med/High598.81.0019
5-Band Windward/Leeward High564.51.0629
Windward/Leeward 60-40 Low1124.90.5334
Windward/Leeward 60-40 Low/Med815.20.7360
Windward/Leeward 60-40 Medium683.60.8777
Windward/Leeward 60-40 Med/High612.90.9790
Windward/Leeward 60-40 High583.91.0276
5-Band AP Low845.40.7097
5-Band AP Low/Med649.80.9233
5-Band AP Medium558.71.0739
5-Band AP Med/High505.11.1880
5-Band AP High475.61.2617
5-Band SF Bay Tour - Low977.00.6141
5-Band SF Bay Tour - Low/Med781.30.7680
5-Band SF Bay Tour - Medium655.70.9151
5-Band SF Bay Tour - Med/High587.01.0221
5-Band SF Bay Tour - High555.41.0802
Chicago-Mac Upwind0.9329
Chicago-Mac All Purpose0.9268
Chicago-Mac Downwind0.9098
Bayview-Mac Cove Island0.6644
Bayview-Mac Shore0.6730
Harvest Moon Regatta497.51.2060
Non Spin/HSFClub Certificate2025
GIGIRSA-4387
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMOUNT GAY 30Measurement12/04/2021HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.600Max. Beam3.238Draft2.240Displacement3,209Wetted area20.66IMS L9.231LSM08.982Acc. length9.600Sink (kg/mm) 16.16
VCGD0.027VCGM-0.023RM Rated (kg·m) 96.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight591Declared crew weightN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0Checkstays0Spreaders2Rotating mastNo
P13.230IG12.265ISP14.525MDT10.090MDL10.170MDT2MDL2TLTaperMW0.170GO
E4.500J3.490BAS1.515FSDNo FoilSFJ0.000SPL0.000WPLTPS4.520BD0.250MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date17/04/2021
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
GIGIRSA-4387
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.311.151.923.093.8537.3213/02/2021
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentN030.130.530.981.822.703.6011.98YesNo 21.9813/02/20214x battens