Non Spin/HSFClub Certificate2026
NITRO 31RSA-31011
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 Angles45.0°42.7°40.3°38.3°37.4°37.0°36.7°36.6°37.4°
Beat VMG2.743.934.795.245.435.555.635.735.68
52°4.275.966.987.477.727.908.048.248.24
60°4.586.277.207.778.098.318.488.718.77
75°4.816.497.348.078.638.959.239.639.83
90°4.656.357.287.998.829.529.9710.7011.19
110°3.955.596.767.518.269.1710.2011.7813.09
120°3.485.096.407.267.958.749.7412.1014.14
135°2.904.345.616.657.368.018.7410.6113.54
150°2.393.624.755.776.637.267.829.1510.82
Run VMG2.073.144.125.005.866.667.308.5310.02
Gybe Angles139.7°143.8°145.8°147.0°172.6°175.0°176.6°175.0°172.8°
APH ToD:527.8CDL: 9.765APH ToT: 1.1368CertNo:ZAN111
BOAT
ClassCape 31DesignerMillsBuilderNoordhoekAge date07/2017Series date07/2017Offset fileCAPE31.offData fileRSA31011
HULL
Length Overall9.573Maximum Beam3.054Draft2.446Displacement1,835DLR2.7114IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.292%RS Assessment-0.254%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.381m
CREW
Maximum weight595(declared)Minimum weight465 ✱ when appliedCrew Arm Extension0.00 m
SAIL AREAS (m²)
MeasuredRatedMainsail36.5537.63Headsail Luffed24.4224.42Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS Maximum (m²)
Trysail9.88Storm Jib7.82Heavy Weather Jib21.10
SAIL LIMITS
Headsails6
✱ Zero set flying
Spinnakers0
✱ No spinnaker pole aboard
STABILITY
Righting Moment 74.5 Stability Index 115.6
COMMENTS
mikeH@amtec.co.za
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  04620004AT9 Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2026
NITRO 31RSA-31011
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 VMG1314.6915.9751.6687.2662.5648.7639.7628.2634.2
52°842.7604.0515.4481.8466.5455.7447.8437.1436.9
60°785.8574.2500.3463.2445.2433.4424.5413.1410.3
75°748.8555.0490.5446.1417.0402.1390.1373.9366.4
90°773.8566.8494.5450.3408.2378.2361.0336.5321.8
110°912.5643.6532.3479.0435.7392.6352.8305.7275.0
120°1034.5707.3562.5495.9453.0412.0369.6297.5254.7
135°1242.4829.1641.8541.0489.2449.6411.7339.2265.8
150°1506.3994.3757.3623.8543.3495.7460.1393.3332.9
Run VMG1739.41148.1874.5720.3614.5540.1492.9422.0359.2
Selected Courses
Windward / Leeward1527.01032.0813.1703.7638.5594.4566.3525.1496.7
All purpose1125.8776.3628.7554.5510.1478.8455.1418.1392.7
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward667.00.8996
All purpose527.81.1368
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.8513
Downwind "popa"0.8728
70% up, 30% down "Ilhabela"0.8576
30% up, 70% down "Ilhabela-inverso"0.8662
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Predominantly Upwind559.41.0726
Predominantly Downwind561.21.0691
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP549.01.0928 Predom. Rc High386.81.5511 5B SF Bay L/M735.10.8162 TriNum AP Low702.50.8541 Predom. Dn Low932.50.6434 5B SF Bay Med623.70.9620 TriNum AP Med527.01.1384 Predom. Dn L/M657.60.9123 5B SF Bay M/H553.31.0844 TriNum AP High447.11.3419 Predom. Dn Med538.31.1145 5B SF Bay High512.51.1707 TriNum W/L Low972.00.6173 Predom. Dn M/H455.11.3182 5B AP Low802.40.7477 TriNum W/L Med663.80.9039 Predom. Dn High400.31.4990 5B AP L/M606.80.9888 TriNum W/L Hig557.91.0755 ChiMac Up Low712.60.8420 5B AP Med517.51.1593 Predom. Upwind581.71.0315 ChiMac Up Med639.60.9381 5B AP M/H457.51.3116 Predom. Reaching522.41.1486 ChiMac Up High552.41.0861 5B AP High420.11.4283 Predom. Downwind590.11.0167 ChiMac Off Low783.80.7655 5B W/L Low1101.00.5450 Predom. Up Low815.70.7356 ChiMac Off Med674.90.8891 5B W/L L/M781.00.7683 Predom. Up L/M614.50.9764 ChiMac Off High543.61.1038 5B W/L Med650.40.9225 Predom. Up Med541.21.1086 ChiMac AP Low741.60.8090 5B W/L M/H570.11.0524 Predom. Up M/H497.71.2056 ChiMac AP Med652.10.9201 5B W/L High527.31.1378 Predom. Up High473.11.2681 ChiMac AP High544.21.1025 W/L 60-40 Low1075.70.5578 Predom. Rc Low767.80.7815 BayMac Cove Island866.90.6921 W/L 60-40 L/M772.80.7764 Predom. Rc L/M569.01.0545 BayMac Shore854.80.7019 W/L 60-40 Med654.30.9170 Predom. Rc Med485.01.2371 Harvest Moon448.81.3368 W/L 60-40 M/H584.41.0268 Predom. Rc M/H425.71.4094 5B SF Bay Low901.50.6656 W/L 60-40 High548.11.0947      SA/DSPL Up40.60SA/DSPL Dn40.60
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance580.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating580.31.0339
FinRating, kevyt tuuli1089.40.9179
FinRating, kova tuuli419.81.1910
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.0339
Triple Number Coastal/Long Distance Low0.8541
Triple Number Coastal/Long Distance Medium1.1386
Triple Number Coastal/Long Distance High1.3419
Triple Number Windward/Leeward Low0.6504
Triple Number Windward/Leeward Medium0.9039
Triple Number Windward/Leeward High1.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
For information
General Purpose Handicap (GPH)597.7
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Saronikos S All_Purpose589.11.0185
Saronikos S Upwind638.90.9391
Saronikos S Downwind543.81.1034
Saronikos N All_Purpose589.11.0185
Saronikos N Upwind667.00.8996
Saronikos N Downwind616.30.9736
Saronikos SW All_Purpose593.01.0117
Saronikos SW Upwind653.10.9187
Saronikos SW Downwind553.21.0846
Saronikos NE All_Purpose666.90.8997
Saronikos NE Upwind625.40.9594
Saronikos NE Downwind703.30.8531
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose549.01.0928
5-Band All-Purpose Low865.90.6929
5-Band All-Purpose L/M631.90.9495
5-Band All-Purpose Med536.31.1188
5-Band All-Purpose M/H473.11.2684
5-Band All-Purpose High434.21.3820
Single Number Predominant Upwind556.91.0775
Single Number Predominant Reaching502.11.1949
Single Number Predominant Downwind563.11.0655
5-Band 50-50 Windward/Leeward Low1101.00.5450
5-Band 50-50 Windward/Leeward L/M781.00.7683
5-Band 50-50 Windward/Leeward Med650.40.9225
5-Band 50-50 Windward/Leeward M/H570.11.0524
5-Band 50-50 Windward/Leeward High527.31.1378
5-Band 60-40 Windward/Leeward Low1075.70.5578
5-Band 60-40 Windward/Leeward L/M772.80.7764
5-Band 60-40 Windward/Leeward Med654.30.9170
5-Band 60-40 Windward/Leeward M/H584.41.0268
5-Band 60-40 Windward/Leeward High548.11.0947
Triple Number 50-50 Windward/Leeward Low972.00.6173
Triple Number 50-50 Windward/Leeward Med663.90.9038
Triple Number 50-50 Windward/Leeward High557.91.0755
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward670.00.8955
Triple Number 60-40 Windward/Leeward Low952.70.6298
Triple Number 60-40 Windward/Leeward Med666.00.9008
Triple Number 60-40 Windward/Leeward High573.81.0456
Triple Number All-Purpose Low771.10.7781
Triple Number All-Purpose Med546.41.0981
Triple Number All-Purpose High462.31.2978
Triple Number Predominant Upwind Low744.50.8059
Triple Number Predominant Upwind Med551.41.0881
Triple Number Predominant Upwind High493.81.2150
Triple Number Predominant Reaching Low690.90.8685
Triple Number Predominant Reaching Med503.41.1919
Triple Number Predominant Reaching High405.61.4794
Triple Number Predominant Downwind Low818.40.7331
Triple Number Predominant Downwind Med555.21.0806
Triple Number Predominant Downwind High434.01.3824
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low702.5
Triple Number Coastal/Long Distance Medium527.0
Triple Number Coastal/Long Distance High447.1
Triple Number Windward/Leeward Low922.5
Triple Number Windward/Leeward Medium663.8
Triple Number Windward/Leeward High557.9
Predominantly Upwind559.4
Predominantly Downwind561.2
Predominantly Reaching519.4
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8541
Triple Number Coastal/Long Distance Medium1.1386
Triple Number Coastal/Long Distance High1.3419
Triple Number Windward/Leeward Low0.6504
Triple Number Windward/Leeward Medium0.9039
Triple Number Windward/Leeward High1.0755
Coastal/Long Distance1.0339
Predominantly Upwind1.0726
Predominantly Downwind1.0691
For information
General Purpose Handicap (GPH)597.7
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.1368
Distanseseilas Trippeltall svak vind0.8541
Distanseseilas Trippeltall mellomvind1.1386
Distanseseilas Trippeltall sterk vind1.3419
Pølsebane Trippeltall svak vind0.6504
Pølsebane Trippeltall mellomvind0.9039
Pølsebane Trippeltall sterk vind1.0755
Motvind Singeltall1.0726
Medvind Singeltall1.0691
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Coastal/Long Distance580.31.0339
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind559.41.0726
Predominantly Downwind561.21.0691
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore505.21.1876
Cape Doctor Coastal400.31.4987
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8541
Triple Number Coastal/Long Distance Medium1.1386
Triple Number Coastal/Long Distance High1.3419
Triple Number Windward/Leeward Low0.6504
Triple Number Windward/Leeward Medium0.9039
Triple Number Windward/Leeward High1.0755
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.8541
Triple Number Coastal/Long Distance Medium1.1386
Triple Number Coastal/Long Distance High1.3419
Triple Number Windward/Leeward Low0.6504
Triple Number Windward/Leeward Medium0.9039
Triple Number Windward/Leeward High1.0755
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Predominantly Upwind559.41.0726
Predominantly Downwind561.21.0691
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance580.31.0339
Triple Number Coastal/Long Distance Low702.50.8541
Triple Number Coastal/Long Distance Medium527.01.1386
Triple Number Coastal/Long Distance High447.11.3419
Triple Number Windward/Leeward Low922.50.6504
Triple Number Windward/Leeward Medium663.80.9039
Triple Number Windward/Leeward High557.91.0755
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1548.21043.6766.2630.7548.0499.3459.2389.3363.2
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP549.01.0928 Predom. Dn High400.31.4990 5B AP M/H457.51.3116 TriNum AP Low702.50.8541 Predom. Rc Low767.80.7815 5B AP High420.11.4283 TriNum AP Med527.01.1384 Predom. Rc L/M569.01.0545 5B SF Bay Low901.50.6656 TriNum AP High447.11.3419 Predom. Rc Med485.01.2371 5B SF Bay L/M735.10.8162 TriNum W/L Low972.00.6173 Predom. Rc M/H425.71.4094 5B SF Bay Med623.70.9620 TriNum W/L Med663.80.9039 Predom. Rc High386.81.5511 5B SF Bay M/H553.31.0844 TriNum W/L Hig557.91.0755 5B W/L Low1101.00.5450 5B SF Bay High512.51.1707 Predom. Upwind581.71.0315 5B W/L L/M781.00.7683 ChiMac Up Low712.60.8420 Predom. Reaching522.41.1486 5B W/L Med650.40.9225 ChiMac Up Med639.60.9381 Predom. Downwind590.11.0167 5B W/L M/H570.11.0524 ChiMac Up High552.41.0861 Predom. Up Low815.70.7356 5B W/L High527.31.1378 ChiMac Off Low783.80.7655 Predom. Up L/M614.50.9764 W/L 60-40 Low1075.70.5578 ChiMac Off Med674.90.8891 Predom. Up Med541.21.1086 W/L 60-40 L/M772.80.7764 ChiMac Off High543.61.1038 Predom. Up M/H497.71.2056 W/L 60-40 Med654.30.9170 ChiMac AP Low741.60.8090 Predom. Up High473.11.2681 W/L 60-40 M/H584.41.0268 ChiMac AP Med652.10.9201 Predom. Dn Low932.50.6434 W/L 60-40 High548.11.0947 ChiMac AP High544.21.1025 Predom. Dn L/M657.60.9123 5B AP Low802.40.7477 BayMac Cove Island866.90.6921 Predom. Dn Med538.31.1145 5B AP L/M606.80.9888 BayMac Shore854.80.7019 Predom. Dn M/H455.11.3182 5B AP Med517.51.1593 Harvest Moon448.81.3368      SA/DSPL Up40.60SA/DSPL Dn40.60
ORC Ref  04620004AT9 Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2026
NITRO 31RSA-31011
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassCape 31Measurement26/07/2017HINPlan reviewHull constructionCoredCarbon rudderYesLight stanchionsYesTrim tabNo
Length overall9.573Maximum beam3.054Draft2.446Displacement1,835Wetted area17.95IMS L9.370LSM08.778Accomod. length9.573Sink (kg/mm) 14.23
VCGD-0.404VCGM-0.404 RM Rated (kg·m) 74.5Limit of positive stability(°) 122.0 Stability Index 115.6 BLR index 0.0000Default crew weight572 Declared crew weight 595
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.381PBW0.100PIPA0.0033
EDL1.100ST10.055ST20.180
ST30.220ST40.100ST50.275
RIG
BackstayAdjustableForestayFixedInner forestayNot installedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysYesCheckstaysNoSpreaders2Rotating mastNo
P12.540IG12.500ISP13.700MDT10.106MDL10.200MDT20.075MDL20.140TL1.360MWGO
E4.500J3.600BAS1.200FSD0.034SFJ0.330SPL0.000WPLTPS5.945BD0.150MWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered74.5Flotation Date05/08/2017
SFFP0.633FFM0.819FF0.819LCFcl5.113SG
SAFP9.573FAM0.693FA0.693LCFsh5.294HBI0.914
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04620004AT9 Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub Certificate2026
NITRO 31RSA-31011
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM41.101.512.123.023.7736.5513/08/2024Panel sail
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJ10.110.621.111.992.873.7112.46YesNo 24.4212/08/2024Mylar panel sailJ20.140.581.051.912.773.6412.30YesNo 23.3130/05/2024Mylar panel sailJ30.110.571.021.922.833.7012.12YesNo 23.1812/08/2024Mylar panel sailJ40.140.520.921.752.633.5010.60YesNo 18.8215/08/2024Mylar panel sail
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
ORC Ref  04620004AT9 Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org