Club Certificate2025
I-ZimbraIRL3307
ORC
Central Rating Office
Issuing certificates for
Ireland
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 Angles41.9°41.9°40.1°38.0°36.7°36.0°35.6°35.3°36.0°
Beat VMG2.663.664.424.945.215.355.435.525.50
52°4.105.496.426.927.177.307.387.487.51
60°4.365.746.617.057.317.477.577.707.75
75°4.525.906.727.147.437.667.848.078.21
90°4.345.776.707.187.447.727.988.408.72
110°4.305.816.847.367.748.038.248.648.95
120°4.165.666.737.297.728.148.559.139.72
135°3.635.096.277.017.487.928.389.5711.63
150°3.024.325.486.447.077.507.928.8810.54
Run VMG2.623.744.745.606.296.847.278.039.13
Gybe Angles145.1°145.1°149.3°153.3°160.3°167.8°173.6°173.6°145.4°
APH ToD:546.1CDL: 9.265APH ToT: 1.0988CertNo:
BOAT
ClassCorby 33DesignerJohn CorbyBuilderMicrospanAge date01/2007Series date01/2007Offset fileCorby33+.offData fileIRL3307
HULL
Length Overall10.020 mMaximum Beam2.916 mDraft2.234 mDisplacement4,430 kgDLR6.5799IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.425m
CREW
Maximum weight595 kg(declared)Minimum weight465 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail35.7636.50Headsail Luffed30.3230.32Headsail FlyingSymmetric95.0995.09Asymmetric
STORM SAIL AREAS (m²)
Trysail10.36Storm Jib9.88Heavy Weather Jib26.68
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.
ORC Ref  03880003TI4Issued on 05/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club Certificate2025
I-ZimbraIRL3307
ORC
Central Rating Office
Issuing certificates for
Ireland
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 VMG1353.3984.9813.9728.4690.6673.2662.7652.6654.9
52°877.4655.8560.5520.3502.2493.1487.7481.1479.3
60°826.0627.0545.0510.5492.7481.8475.6467.6464.5
75°795.9610.1536.0504.1484.2469.7458.9446.0438.5
90°828.7623.7537.0501.2483.9466.4451.3428.5413.0
110°836.5619.7526.0489.1465.2448.3436.7416.8402.2
120°866.3636.5535.2493.6466.2442.4421.1394.1370.6
135°991.8707.2574.4513.8481.4454.7429.5376.2309.5
150°1190.8833.2657.5559.1509.1479.8454.6405.4341.6
Run VMG1375.3962.1759.3642.7571.9526.2495.4448.4394.5
Selected Courses
Windward / Leeward1363.5973.5786.6685.5631.3599.7579.1550.5524.7
All purpose1037.3755.6626.1562.9529.3508.2492.6468.1445.4
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward659.20.9102
All purpose546.11.0988
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8067
Downwind "popa"0.9533
70% up, 30% down "Ilhabela"0.8457
30% up, 70% down "Ilhabela-inverso"0.9040
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Predominantly Upwind587.21.0219
Predominantly Downwind554.91.0812
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low690.90.8685
Triple Number AP Medium543.31.1043
Triple Number AP High487.31.2312
Triple Number Windward/Leeward Low918.40.6533
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Single Number Predominant Upwind608.90.9853
Single Number Predominant Reaching546.21.0986
Single Number Predominant Downwind577.21.0395
Predominant Upwind - Low825.80.7266
Predominant Upwind - Low/Med639.10.9388
Predominant Upwind - Medium570.11.0524
Predominant Upwind - Med/High534.01.1235
Predominant Upwind - High514.71.1656
Predominant Downwind Low834.40.7191
Predominant Downwind Low/Med623.90.9617
Predominant Downwind Medium537.21.1169
Predominant Downwind Med/High480.51.2487
Predominant Downwind High440.11.3634
Predominant Reaching Low744.50.8059
Predominant Reaching Low/Med577.81.0384
Predominant Reaching Medium514.81.1656
Predominant Reaching Med/High473.31.2677
Predominant Reaching High442.91.3547
SA/DSPL Upwind24.38SA/DSPL Downwind48.27
Scoring OptionTODTOT
5-Band Windward/Leeward Low1024.50.5857
5-Band Windward/Leeward Low/Med755.60.7941
5-Band Windward/Leeward Medium643.60.9323
5-Band Windward/Leeward Med/High582.11.0307
5-Band Windward/Leeward High551.01.0890
Windward/Leeward 60-40 Low1026.40.5846
Windward/Leeward 60-40 Low/Med762.60.7868
Windward/Leeward 60-40 Medium655.20.9157
Windward/Leeward 60-40 Med/High598.71.0021
Windward/Leeward 60-40 High571.71.0494
5-Band AP Low762.70.7867
5-Band AP Low/Med608.60.9859
5-Band AP Medium536.31.1187
5-Band AP Med/High494.21.2141
5-Band AP High468.41.2809
5-Band SF Bay Tour - Low884.70.6782
5-Band SF Bay Tour - Low/Med723.70.8291
5-Band SF Bay Tour - Medium623.50.9624
5-Band SF Bay Tour - Med/High568.71.0550
5-Band SF Bay Tour - High538.71.1137
Chicago-Mac Upwind0.9573
Chicago-Mac All Purpose0.9823
Chicago-Mac Downwind1.0029
Bayview-Mac Cove Island0.7286
Bayview-Mac Shore0.7336
Harvest Moon Regatta481.51.2462
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance590.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating590.91.0155
FinRating, kevyt tuuli1007.70.9924
FinRating, kova tuuli470.61.0625
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0155
Triple Number Coastal/Long Distance Low0.8685
Triple Number Coastal/Long Distance Medium1.1044
Triple Number Coastal/Long Distance High1.2312
Triple Number Windward/Leeward Low0.6818
Triple Number Windward/Leeward Medium0.9169
Triple Number Windward/Leeward High1.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
For information
General Purpose Handicap (GPH)610.6
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low690.8
Triple Number Coastal/Long Distance Medium543.3
Triple Number Coastal/Long Distance High487.3
Triple Number Windward/Leeward Low880.0
Triple Number Windward/Leeward Medium654.4
Triple Number Windward/Leeward High573.5
Predominantly Upwind587.2
Predominantly Downwind554.9
Predominantly Reaching535.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8685
Triple Number Coastal/Long Distance Medium1.1044
Triple Number Coastal/Long Distance High1.2312
Triple Number Windward/Leeward Low0.6818
Triple Number Windward/Leeward Medium0.9169
Triple Number Windward/Leeward High1.0462
Coastal/Long Distance1.0155
Predominantly Upwind1.0219
Predominantly Downwind1.0812
For information
General Purpose Handicap (GPH)610.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0988
Distanseseilas Trippeltall svak vind0.8685
Distanseseilas Trippeltall mellomvind1.1044
Distanseseilas Trippeltall sterk vind1.2312
Pølsebane Trippeltall svak vind0.6818
Pølsebane Trippeltall mellomvind0.9169
Pølsebane Trippeltall sterk vind1.0462
Motvind Singeltall1.0219
Medvind Singeltall1.0812
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Coastal/Long Distance590.91.0155
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind587.21.0219
Predominantly Downwind554.91.0812
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore532.41.1269
Cape Doctor Coastal452.21.3268
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8685
Triple Number Coastal/Long Distance Medium1.1044
Triple Number Coastal/Long Distance High1.2312
Triple Number Windward/Leeward Low0.6818
Triple Number Windward/Leeward Medium0.9169
Triple Number Windward/Leeward High1.0462
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8685
Triple Number Coastal/Long Distance Medium1.1044
Triple Number Coastal/Long Distance High1.2312
Triple Number Windward/Leeward Low0.6818
Triple Number Windward/Leeward Medium0.9169
Triple Number Windward/Leeward High1.0462
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Predominantly Upwind587.21.0219
Predominantly Downwind554.91.0812
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance590.91.0155
Triple Number Coastal/Long Distance Low690.80.8685
Triple Number Coastal/Long Distance Medium543.31.1044
Triple Number Coastal/Long Distance High487.31.2312
Triple Number Windward/Leeward Low880.00.6818
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1444.5972.3743.0625.6561.6526.1497.3451.8430.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low690.90.8685
Triple Number AP Medium543.31.1043
Triple Number AP High487.31.2312
Triple Number Windward/Leeward Low918.40.6533
Triple Number Windward/Leeward Medium654.40.9169
Triple Number Windward/Leeward High573.51.0462
Single Number Predominant Upwind608.90.9853
Single Number Predominant Reaching546.21.0986
Single Number Predominant Downwind577.21.0395
Predominant Upwind - Low825.80.7266
Predominant Upwind - Low/Med639.10.9388
Predominant Upwind - Medium570.11.0524
Predominant Upwind - Med/High534.01.1235
Predominant Upwind - High514.71.1656
Predominant Downwind Low834.40.7191
Predominant Downwind Low/Med623.90.9617
Predominant Downwind Medium537.21.1169
Predominant Downwind Med/High480.51.2487
Predominant Downwind High440.11.3634
Predominant Reaching Low744.50.8059
Predominant Reaching Low/Med577.81.0384
Predominant Reaching Medium514.81.1656
Predominant Reaching Med/High473.31.2677
Predominant Reaching High442.91.3547
SA/DSPL Upwind24.38SA/DSPL Downwind48.27
Scoring OptionTODTOT
5-Band Windward/Leeward Low1024.50.5857
5-Band Windward/Leeward Low/Med755.60.7941
5-Band Windward/Leeward Medium643.60.9323
5-Band Windward/Leeward Med/High582.11.0307
5-Band Windward/Leeward High551.01.0890
Windward/Leeward 60-40 Low1026.40.5846
Windward/Leeward 60-40 Low/Med762.60.7868
Windward/Leeward 60-40 Medium655.20.9157
Windward/Leeward 60-40 Med/High598.71.0021
Windward/Leeward 60-40 High571.71.0494
5-Band AP Low762.70.7867
5-Band AP Low/Med608.60.9859
5-Band AP Medium536.31.1187
5-Band AP Med/High494.21.2141
5-Band AP High468.41.2809
5-Band SF Bay Tour - Low884.70.6782
5-Band SF Bay Tour - Low/Med723.70.8291
5-Band SF Bay Tour - Medium623.50.9624
5-Band SF Bay Tour - Med/High568.71.0550
5-Band SF Bay Tour - High538.71.1137
Chicago-Mac Upwind0.9573
Chicago-Mac All Purpose0.9823
Chicago-Mac Downwind1.0029
Bayview-Mac Cove Island0.7286
Bayview-Mac Shore0.7336
Harvest Moon Regatta481.51.2462
ORC Ref  03880003TI4Issued on 05/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club Certificate2025
I-ZimbraIRL3307
ORC
Central Rating Office
Issuing certificates for
Ireland
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassCorby 33Measurement27/05/2025HINEE-EACPC288D222Plan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.020Max. Beam2.916Draft2.234Displacement4,430Wetted area21.53IMS L9.179LSM08.764Acc. length9.477Sink (kg/mm) 14.74
VCGD-0.645VCGM-0.558RM Rated (kg·m) 106.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight570Declared crew weight595
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.425PBW0.100PIPA0.0031
EDL2.610ST10.042ST20.180
ST30.180ST40.112ST50.195
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P13.150IG13.945ISP14.720MDT10.110MDL10.211MDT20.110MDL20.145TL2.750MW0.185GO0.217
E4.500J4.070BAS1.410FSD0.036SFJ0.000SPL4.460WPLTPS4.430BD0.175MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered106.0Flotation Date27/05/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03880003TI4Issued on 05/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org
Club Certificate2025
I-ZimbraIRL3307
ORC
Central Rating Office
Issuing certificates for
Ireland
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.971.752.9535.76IRC 2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.621.172.194.1714.10NoNo 30.32IRC 2024
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment014.6014.6014.607.907.4895.09IRC 2024
ORC Ref  03880003TI4Issued on 05/06/2025Valid until 31/12/2025
VPP ver: 2025 1.01 | © ORC | www.orc.org