Club 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°35.7°35.4°35.4°36.5°
Beat VMG2.653.654.434.975.215.335.405.475.40
52°4.115.496.426.947.177.297.377.487.50
60°4.365.756.627.087.367.507.617.757.80
75°4.515.906.747.197.567.848.018.248.35
90°4.656.116.997.317.577.958.318.779.05
110°4.806.297.207.788.178.508.839.4510.06
120°4.676.177.157.798.388.889.3110.2111.21
135°3.945.516.737.428.048.719.5411.8013.72
150°3.304.645.786.737.397.908.4510.3714.17
Run VMG2.864.025.015.836.446.867.318.9812.27
Gybe Angles142.9°142.9°147.2°150.1°153.9°152.8°149.6°140.2°146.0°
APH ToD:531.4CDL: 9.297APH ToT: 1.1291CertNo:ZAC060
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 FlyingSymmetricAsymmetric117.70117.70 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail10.42Storm Jib6.84Heavy Weather Jib18.47
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
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 VMG1356.1986.6813.4724.0690.3675.6666.4658.3666.1
52°876.2655.8560.4518.8502.0494.1488.4481.3480.2
60°826.0626.6544.0508.3489.3479.9473.0464.4461.4
75°797.7609.8534.1500.7476.3459.3449.7436.9430.9
90°774.8588.9515.1492.5475.6452.7433.4410.7397.9
110°749.5572.7499.7462.8440.7423.3407.9380.8357.8
120°770.8583.1503.5462.4429.6405.4386.6352.6321.1
135°914.3653.6534.7485.1447.9413.3377.2305.0262.4
150°1091.1775.8622.4535.1487.4455.4426.2347.2254.0
Run VMG1260.9895.8718.7617.9559.3524.5492.2401.0293.3
Selected Courses
Windward / Leeward1308.2941.2766.1670.9624.8600.1579.3529.6479.7
All purpose990.3727.6608.0548.7517.2496.2478.6444.0415.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward649.70.9235
All purpose531.41.1291
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8054
Downwind "popa"0.9978
70% up, 30% down "Ilhabela"0.8549
30% up, 70% down "Ilhabela-inverso"0.9311
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Predominantly Upwind579.11.0362
Predominantly Downwind532.81.1261
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low667.80.8985
Triple Number AP Medium530.11.1319
Triple Number AP High470.01.2765
Triple Number Windward/Leeward Low889.60.6745
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Single Number Predominant Upwind599.51.0008
Single Number Predominant Reaching525.21.1425
Single Number Predominant Downwind550.41.0901
Predominant Upwind - Low808.80.7419
Predominant Upwind - Low/Med629.00.9539
Predominant Upwind - Medium563.21.0653
Predominant Upwind - Med/High526.31.1401
Predominant Upwind - High503.41.1920
Predominant Downwind Low786.90.7624
Predominant Downwind Low/Med597.51.0043
Predominant Downwind Medium518.61.1569
Predominant Downwind Med/High457.11.3127
Predominant Downwind High400.61.4976
Predominant Reaching Low709.30.8459
Predominant Reaching Low/Med558.01.0754
Predominant Reaching Medium499.21.2019
Predominant Reaching Med/High452.01.3274
Predominant Reaching High415.11.4454
SA/DSPL Upwind27.15SA/DSPL Downwind70.97
Scoring OptionTODTOT
5-Band Windward/Leeward Low989.20.6065
5-Band Windward/Leeward Low/Med737.50.8136
5-Band Windward/Leeward Medium636.30.9430
5-Band Windward/Leeward Med/High578.21.0377
5-Band Windward/Leeward High529.61.1330
Windward/Leeward 60-40 Low998.50.6009
Windward/Leeward 60-40 Low/Med747.80.8023
Windward/Leeward 60-40 Medium649.30.9240
Windward/Leeward 60-40 Med/High596.31.0063
Windward/Leeward 60-40 High555.91.0794
5-Band AP Low729.00.8230
5-Band AP Low/Med591.31.0147
5-Band AP Medium523.31.1466
5-Band AP Med/High479.01.2527
5-Band AP High445.01.3484
5-Band SF Bay Tour - Low857.70.6995
5-Band SF Bay Tour - Low/Med706.00.8499
5-Band SF Bay Tour - Medium613.00.9788
5-Band SF Bay Tour - Med/High558.91.0735
5-Band SF Bay Tour - High516.21.1624
Chicago-Mac Upwind0.9725
Chicago-Mac All Purpose1.0121
Chicago-Mac Downwind1.0492
Bayview-Mac Cove Island0.7548
Bayview-Mac Shore0.7592
Harvest Moon Regatta460.11.3041
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance576.1
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0415
Triple Number Coastal/Long Distance Low0.8985
Triple Number Coastal/Long Distance Medium1.1320
Triple Number Coastal/Long Distance High1.2765
Triple Number Windward/Leeward Low0.7029
Triple Number Windward/Leeward Medium0.9291
Triple Number Windward/Leeward High1.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
For information
General Purpose Handicap (GPH)593.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low667.8
Triple Number Coastal/Long Distance Medium530.0
Triple Number Coastal/Long Distance High470.0
Triple Number Windward/Leeward Low853.6
Triple Number Windward/Leeward Medium645.8
Triple Number Windward/Leeward High565.8
Predominantly Upwind579.1
Predominantly Downwind532.8
Predominantly Reaching514.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8985
Triple Number Coastal/Long Distance Medium1.1320
Triple Number Coastal/Long Distance High1.2765
Triple Number Windward/Leeward Low0.7029
Triple Number Windward/Leeward Medium0.9291
Triple Number Windward/Leeward High1.0604
Coastal/Long Distance1.0415
Predominantly Upwind1.0362
Predominantly Downwind1.1261
For information
General Purpose Handicap (GPH)593.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.1291
Distanseseilas Trippeltall svak vind0.8985
Distanseseilas Trippeltall mellomvind1.1320
Distanseseilas Trippeltall sterk vind1.2765
Pølsebane Trippeltall svak vind0.7029
Pølsebane Trippeltall mellomvind0.9291
Pølsebane Trippeltall sterk vind1.0604
Motvind Singeltall1.0362
Medvind Singeltall1.1261
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Coastal/Long Distance576.11.0415
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind579.11.0362
Predominantly Downwind532.81.1261
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore494.71.2129
Cape Doctor Coastal423.81.4159
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8985
Triple Number Coastal/Long Distance Medium1.1320
Triple Number Coastal/Long Distance High1.2765
Triple Number Windward/Leeward Low0.7029
Triple Number Windward/Leeward Medium0.9291
Triple Number Windward/Leeward High1.0604
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8985
Triple Number Coastal/Long Distance Medium1.1320
Triple Number Coastal/Long Distance High1.2765
Triple Number Windward/Leeward Low0.7029
Triple Number Windward/Leeward Medium0.9291
Triple Number Windward/Leeward High1.0604
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Predominantly Upwind579.11.0362
Predominantly Downwind532.81.1261
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance576.11.0415
Triple Number Coastal/Long Distance Low667.80.8985
Triple Number Coastal/Long Distance Medium530.01.1320
Triple Number Coastal/Long Distance High470.01.2765
Triple Number Windward/Leeward Low853.60.7029
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1377.8936.7722.1610.8549.5514.3483.4427.1396.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low667.80.8985
Triple Number AP Medium530.11.1319
Triple Number AP High470.01.2765
Triple Number Windward/Leeward Low889.60.6745
Triple Number Windward/Leeward Medium645.80.9291
Triple Number Windward/Leeward High565.81.0604
Single Number Predominant Upwind599.51.0008
Single Number Predominant Reaching525.21.1425
Single Number Predominant Downwind550.41.0901
Predominant Upwind - Low808.80.7419
Predominant Upwind - Low/Med629.00.9539
Predominant Upwind - Medium563.21.0653
Predominant Upwind - Med/High526.31.1401
Predominant Upwind - High503.41.1920
Predominant Downwind Low786.90.7624
Predominant Downwind Low/Med597.51.0043
Predominant Downwind Medium518.61.1569
Predominant Downwind Med/High457.11.3127
Predominant Downwind High400.61.4976
Predominant Reaching Low709.30.8459
Predominant Reaching Low/Med558.01.0754
Predominant Reaching Medium499.21.2019
Predominant Reaching Med/High452.01.3274
Predominant Reaching High415.11.4454
SA/DSPL Upwind27.15SA/DSPL Downwind70.97
Scoring OptionTODTOT
5-Band Windward/Leeward Low989.20.6065
5-Band Windward/Leeward Low/Med737.50.8136
5-Band Windward/Leeward Medium636.30.9430
5-Band Windward/Leeward Med/High578.21.0377
5-Band Windward/Leeward High529.61.1330
Windward/Leeward 60-40 Low998.50.6009
Windward/Leeward 60-40 Low/Med747.80.8023
Windward/Leeward 60-40 Medium649.30.9240
Windward/Leeward 60-40 Med/High596.31.0063
Windward/Leeward 60-40 High555.91.0794
5-Band AP Low729.00.8230
5-Band AP Low/Med591.31.0147
5-Band AP Medium523.31.1466
5-Band AP Med/High479.01.2527
5-Band AP High445.01.3484
5-Band SF Bay Tour - Low857.70.6995
5-Band SF Bay Tour - Low/Med706.00.8499
5-Band SF Bay Tour - Medium613.00.9788
5-Band SF Bay Tour - Med/High558.91.0735
5-Band SF Bay Tour - High516.21.1624
Chicago-Mac Upwind0.9725
Chicago-Mac All Purpose1.0121
Chicago-Mac Downwind1.0492
Bayview-Mac Cove Island0.7548
Bayview-Mac Shore0.7592
Harvest Moon Regatta460.11.3041
Club 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 L9.235LSM08.982Acc. length9.600Sink (kg/mm) 16.16
VCGD0.024VCGM-0.026RM Rated (kg·m) 96.1Limit 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
Club 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
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentNew A215.7413.7414.749.539.7997%117.70WHITE15.8313.8114.828.337.88106%101.7613/02/20210,75oz