International
Certificate
2023

Boat

Kira

EST 874

Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles42.0°40.5°38.7°37.6°37.0°36.9°37.0°
Beat VMG3.624.374.885.145.255.315.35
52°5.466.386.897.147.277.357.42
60°5.716.587.037.297.467.557.66
75°5.886.697.127.437.677.868.08
90°5.746.707.207.437.738.008.45
110°5.786.837.377.778.118.348.77
120°5.646.737.307.758.188.619.29
135°5.106.277.007.477.918.389.61
150°4.295.416.387.037.477.888.83
Run VMG3.714.685.536.236.807.268.04
Gybe Angles140.3°148.4°152.3°158.8°172.7°177.2°177.2°

APH: 549.5

CDL: 9.100

GPH: 614.4

CertNo: 633

BOAT
ClassCorby 33DesignerJohn CorbyBuilderMicrospanAge date12/2006Series date01/2006Offset fileCorby33+.offData fileSWE633 Corby33 Onecorner
HULL
Length Overall10.000 mMaximum Beam2.916 mDraft2.223 mDisplacement4,236 kgDLR6.4717IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.374m
CREW
Maximum weight660 kgMinimum weight495 kg * when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail35.3736.07Headsail Luffed29.2629.26Headsail FlyingSymmetric94.0094.00Asymmetric
STORM SAIL AREAS (m²)
Trysail10.36Storm Jib9.88Heavy Weather Jib26.68
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment104.0 kg·mStability Index153.7
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  04340002LRQIssued on 16/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Kira

EST 874

Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG994.2823.2737.3700.4685.7677.7673.4
52°659.8563.9522.8504.1495.1490.1485.4
60°630.0547.5512.4493.8482.7476.5470.0
75°612.7537.8505.3484.7469.4458.1445.4
90°626.8537.3500.3484.3466.0450.1425.8
110°622.5527.1488.6463.1443.8431.7410.7
120°638.8535.3492.9464.5440.0418.0387.4
135°705.5573.9514.4481.9454.9429.4374.5
150°840.1665.8564.7512.0482.2456.9407.8
Run VMG970.0768.8650.8577.7529.1495.9448.0
Selected Courses
Windward / Leeward982.1796.0694.0639.1607.4586.8560.7
All purpose760.5630.6566.5532.4511.1495.6471.9
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward667.40.8990
All purpose549.51.0920
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7937
Downwind "popa"0.9459
70% up, 30% down "Ilhabela"0.8339
30% up, 70% down "Ilhabela-inverso"0.8944
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Predominantly Upwind592.01.0136
Predominantly Downwind557.91.0755
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low695.60.8626
Triple Number All Purpose Medium546.61.0977
Triple Number All Purpose High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Predominantly Upwind592.01.0136
Predominantly Downwind557.91.0755
Predominantly Upwind Low769.10.7801
Predominantly Upwind Medium609.40.9846
Predominantly Upwind High571.61.0497
Predominantly Downwind Low759.70.7898
Predominantly Downwind Medium554.31.0825
Predominantly Downwind High463.51.2945
Chicago-Mac Upwind0.9969
Chicago-Mac All Purpose1.0237
Chicago-Mac Downwind1.0578
Bayview-Mac Cove Island0.9550
Bayview-Mac Shore0.9636
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching525.91.1408
Predominantly Reaching Low633.30.9473
Predominantly Reaching Medium521.51.1506
Predominantly Reaching High460.61.3025
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low967.80.6200
5-Band Low / Medium814.40.7367
5-Band Medium651.60.9208
5-Band Medium / High590.31.0165
5-Band High565.21.0615
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance595.7
Triple Number Coastal/Long Distance Low695.6
Triple Number Coastal/Long Distance Medium546.6
Triple Number Coastal/Long Distance High490.6
Triple Number Windward/Leeward Low889.0
Triple Number Windward/Leeward Medium662.5
Triple Number Windward/Leeward High582.2
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8626
Triple Number Coastal/Long Distance Medium1.0977
Triple Number Coastal/Long Distance High1.2230
Triple Number Windward/Leeward Low0.6749
Triple Number Windward/Leeward Medium0.9056
Triple Number Windward/Leeward High1.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low695.6
Triple Number Coastal/Long Distance Medium546.6
Triple Number Coastal/Long Distance High490.6
Triple Number Windward/Leeward Low889.0
Triple Number Windward/Leeward Medium662.5
Triple Number Windward/Leeward High582.2
Predominantly Upwind592.0
Predominantly Downwind557.9
Predominantly Reaching537.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8626
Triple Number Coastal/Long Distance Medium1.0977
Triple Number Coastal/Long Distance High1.2230
Triple Number Windward/Leeward Low0.6749
Triple Number Windward/Leeward Medium0.9056
Triple Number Windward/Leeward High1.0306
Coastal/Long Distance1.0073
Predominantly Upwind1.0136
Predominantly Downwind1.0755
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8626
Tretall Distanseseilas Mellomvind1.0977
Tretall Distanseseilas Mye vind1.2230
Tretall Pølsebane Lite vind0.6749
Tretall Pølsebane Mellomvind0.9056
Tretall Pølsebane Mye vind1.0306
Distanseseilas ett tall (OSN 8-16kn)1.0073
Distanseseilas ett tall (APH 6-20kn)1.0920
Enkeltall Motvind1.0136
Enkeltall Medvind1.0755
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Coastal/Long Distance595.71.0073
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind592.01.0136
Predominantly Downwind557.91.0755
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore568.51.0553
Cape Doctor Coastal479.01.2525
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8626
Triple Number Coastal/Long Distance Medium1.0977
Triple Number Coastal/Long Distance High1.2230
Triple Number Windward/Leeward Low0.6749
Triple Number Windward/Leeward Medium0.9056
Triple Number Windward/Leeward High1.0306
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8626
Triple Number Coastal/Long Distance Medium1.0977
Triple Number Coastal/Long Distance High1.2230
Triple Number Windward/Leeward Low0.6749
Triple Number Windward/Leeward Medium0.9056
Triple Number Windward/Leeward High1.0306
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Predominantly Upwind592.01.0136
Predominantly Downwind557.91.0755
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance595.71.0073
Triple Number Coastal/Long Distance Low695.60.8626
Triple Number Coastal/Long Distance Medium546.61.0977
Triple Number Coastal/Long Distance High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance980.9751.1631.5565.7529.6500.1452.4
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low695.60.8626
Triple Number All Purpose Medium546.61.0977
Triple Number All Purpose High490.61.2230
Triple Number Windward/Leeward Low889.00.6749
Triple Number Windward/Leeward Medium662.50.9056
Triple Number Windward/Leeward High582.21.0306
Predominantly Upwind592.01.0136
Predominantly Downwind557.91.0755
Predominantly Upwind Low769.10.7801
Predominantly Upwind Medium609.40.9846
Predominantly Upwind High571.61.0497
Predominantly Downwind Low759.70.7898
Predominantly Downwind Medium554.31.0825
Predominantly Downwind High463.51.2945
Chicago-Mac Upwind0.9969
Chicago-Mac All Purpose1.0237
Chicago-Mac Downwind1.0578
Bayview-Mac Cove Island0.9550
Bayview-Mac Shore0.9636
Harvest Moon Regatta481.61.2458
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy570.61.0516
San Francisco Bay Medium656.40.9141
Predominantly Reaching525.91.1408
Predominantly Reaching Low633.30.9473
Predominantly Reaching Medium521.51.1506
Predominantly Reaching High460.61.3025
Windward/Leeward 60-40 Low893.00.6719
Windward/Leeward 60-40 Medium681.90.8799
Windward/Leeward 60-40 High614.80.9759
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low967.80.6200
5-Band Low / Medium814.40.7367
5-Band Medium651.60.9208
5-Band Medium / High590.31.0165
5-Band High565.21.0615
ORC Ref  04340002LRQIssued on 16/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Kira

EST 874

Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassCorby 33Measurement22/05/2019HIN006Plan reviewHull constructionCoredCarbon RudderYesLight stanchionsNoTrim tabNo
LOA10.000Max. Beam2.916Draft2.223Displacement4,236Wetted area21.20IMS L9.110LSM08.682Acc. length9.477Sink (kg/mm) 14.47
VCGD-0.672VCGM-0.572RM Rated (kg·m) 104.0Limit of positive stability(°) 150.2Stability Index153.7
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.374PBW0.096PIPA0.0031
EDL2.610ST10.042ST20.180
ST30.180ST40.112ST50.195
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P13.150IG13.945ISP14.030MDT10.110MDL10.211MDT20.110MDL20.145TL2.750MW0.185GO0.217
E4.500J4.040BAS1.410FSD0.036SFJ0.000SPL4.426WPLTPSBD0.175MWT159.60MCG5.765
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date24/08/2020MeasurerJT1330CommentTorpa
SFFP0.610FFM1.084FF1.092LCFcl5.060SG1.0030
SAFP10.019FAM0.968FA0.973LCFsh5.247HBI1.018
W179.6W279.6W379.6W479.6
PD1674.0PD2683.0PD3683.4PD4686.1
WD11.153PLM9000.00GSA1.0RSA1.0RM102.6
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04340002LRQIssued on 16/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

Kira

EST 874

Estonian Yachting Union
Purje 8, maja 3
11911 Tallinn
Estonia
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMain0.170.971.722.913.7835.3718/11/20193Di
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJ20.080.601.122.113.094.1413.91YesNo 29.2604/03/2023J2 2023J-M/H0.080.591.112.083.064.0813.77YesNo 28.6118/11/2019J-L/Ma0.100.591.112.053.014.0613.42YesNo 27.6114/05/2023J1K-3.50.100.591.092.063.084.0812.47YesNo 25.8823/01/2020SS_Spin0.150.520.901.692.463.2412.54NoInner 21.0619/02/2021
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS2_2020a14.2014.2014.208.037.6094.0014/05/2023S2S2_202314.4414.4414.447.807.8393.9303/04/2023S2 2023S314.4114.4114.416.907.8885.2105/12/2019S0_202114.2514.2514.255.407.1068.1620/02/2021
ORC Ref  04340002LRQIssued on 16/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org