Non Spin/HSFClub Certificate2025
FireflyGBR 3550L
ORC
Central Rating Office
Issuing certificates for
UNITED KINGDOM
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 Angles42.0°42.0°40.1°38.2°37.2°36.7°36.5°36.5°37.7°
Beat VMG2.713.714.474.995.245.365.435.495.42
52°4.185.586.517.037.277.397.467.557.56
60°4.445.846.717.187.447.587.677.797.82
75°4.616.016.847.287.607.848.008.208.31
90°4.475.896.787.267.607.918.208.618.86
110°3.855.256.307.017.457.828.188.949.62
120°3.524.906.006.807.297.678.058.839.86
135°2.984.255.376.276.927.357.728.459.34
150°2.443.584.635.506.266.847.247.918.62
Run VMG2.133.104.014.875.686.396.957.708.40
Gybe Angles144.9°144.9°146.7°174.4°176.2°177.5°178.9°179.3°178.9°
APH ToD:566.5CDL: 9.459APH ToT: 1.0591CertNo:072401
BOAT
ClassX-35DesignerN. JEPPESENBuilderX YACHTSAge date03/2007Series date09/2005Offset filex35.od.offData fileGBR3550L
HULL
Length Overall10.600 mMaximum Beam3.250 mDraft2.175 mDisplacement4,651 kgDLR6.0737IMS DivisionCruiser/RacerDynamic Allowance0.090%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.400m
CREW
Maximum weight650 kg(declared)Minimum weight520 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail40.9641.79Headsail Luffed31.2631.26Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail11.88Storm Jib10.45Heavy Weather Jib28.19
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ No spinnaker pole aboard
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
SPL = 4.284
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
FireflyGBR 3550L
ORC
Central Rating Office
Issuing certificates for
UNITED KINGDOM
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 VMG1330.3971.3804.9721.3687.6672.1663.4655.8664.0
52°861.1645.5552.7512.1494.9487.3482.4476.8476.2
60°810.9616.6536.4501.5483.9474.7469.2462.2460.1
75°780.7599.1526.6494.4473.8459.3449.7438.8433.3
90°805.2611.3531.1495.7473.5454.9439.3418.3406.4
110°935.2685.9571.6513.8483.5460.4439.8402.7374.3
120°1022.1735.2599.6529.3493.7469.2447.5407.6365.2
135°1207.9846.8671.0574.3520.2489.5466.6426.1385.5
150°1472.81005.3777.5654.6575.1526.3496.9455.4417.6
Run VMG1689.21160.8897.8739.7634.3563.3518.1467.6428.7
Selected Courses
Windward / Leeward1507.61066.0851.4730.5661.0617.7590.7561.7546.4
All purpose1123.9811.5664.8588.4545.9519.6501.8477.5460.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward693.50.8651
All purpose566.51.0591
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8114
Downwind "popa"0.8431
70% up, 30% down "Ilhabela"0.8206
30% up, 70% down "Ilhabela-inverso"0.8333
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Predominantly Upwind595.51.0075
Predominantly Downwind596.01.0068
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low738.10.8129
Triple Number AP Medium563.51.0648
Triple Number AP High497.21.2068
Triple Number Windward/Leeward Low1001.70.5990
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Single Number Predominant Upwind617.70.9714
Single Number Predominant Reaching566.11.0598
Single Number Predominant Downwind624.80.9602
Predominant Upwind - Low848.50.7071
Predominant Upwind - Low/Med651.30.9212
Predominant Upwind - Medium575.61.0423
Predominant Upwind - Med/High537.21.1170
Predominant Upwind - High520.61.1526
Predominant Downwind Low948.20.6327
Predominant Downwind Low/Med687.90.8723
Predominant Downwind Medium571.91.0491
Predominant Downwind Med/High500.41.1991
Predominant Downwind High463.31.2949
Predominant Reaching Low794.60.7551
Predominant Reaching Low/Med605.50.9910
Predominant Reaching Medium528.01.1364
Predominant Reaching Med/High481.21.2470
Predominant Reaching High455.11.3184
SA/DSPL Upwind25.79SA/DSPL Downwind25.79
Scoring OptionTODTOT
5-Band Windward/Leeward Low1123.30.5341
5-Band Windward/Leeward Low/Med812.30.7387
5-Band Windward/Leeward Medium675.30.8885
5-Band Windward/Leeward Med/High596.31.0062
5-Band Windward/Leeward High564.01.0637
Windward/Leeward 60-40 Low1102.50.5442
Windward/Leeward 60-40 Low/Med806.30.7441
Windward/Leeward 60-40 Medium679.90.8825
Windward/Leeward 60-40 Med/High610.10.9834
Windward/Leeward 60-40 High582.91.0293
5-Band AP Low828.30.7244
5-Band AP Low/Med641.90.9347
5-Band AP Medium554.81.0815
5-Band AP Med/High504.41.1894
5-Band AP High478.91.2529
5-Band SF Bay Tour - Low958.50.6260
5-Band SF Bay Tour - Low/Med772.20.7770
5-Band SF Bay Tour - Medium651.60.9209
5-Band SF Bay Tour - Med/High584.71.0261
5-Band SF Bay Tour - High556.01.0792
Chicago-Mac Upwind0.9423
Chicago-Mac All Purpose0.9368
Chicago-Mac Downwind0.9207
Bayview-Mac Cove Island0.6769
Bayview-Mac Shore0.6855
Harvest Moon Regatta496.81.2078
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance618.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating618.70.9697
FinRating, kevyt tuuli1106.10.9041
FinRating, kova tuuli482.31.0367
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9697
Triple Number Coastal/Long Distance Low0.8129
Triple Number Coastal/Long Distance Medium1.0649
Triple Number Coastal/Long Distance High1.2068
Triple Number Windward/Leeward Low0.6258
Triple Number Windward/Leeward Medium0.8706
Triple Number Windward/Leeward High1.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
For information
General Purpose Handicap (GPH)638.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low738.1
Triple Number Coastal/Long Distance Medium563.4
Triple Number Coastal/Long Distance High497.2
Triple Number Windward/Leeward Low958.8
Triple Number Windward/Leeward Medium689.2
Triple Number Windward/Leeward High586.6
Predominantly Upwind595.5
Predominantly Downwind596.0
Predominantly Reaching561.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8129
Triple Number Coastal/Long Distance Medium1.0649
Triple Number Coastal/Long Distance High1.2068
Triple Number Windward/Leeward Low0.6258
Triple Number Windward/Leeward Medium0.8706
Triple Number Windward/Leeward High1.0229
Coastal/Long Distance0.9697
Predominantly Upwind1.0075
Predominantly Downwind1.0068
For information
General Purpose Handicap (GPH)638.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0591
Distanseseilas Trippeltall svak vind0.8129
Distanseseilas Trippeltall mellomvind1.0649
Distanseseilas Trippeltall sterk vind1.2068
Pølsebane Trippeltall svak vind0.6258
Pølsebane Trippeltall mellomvind0.8706
Pølsebane Trippeltall sterk vind1.0229
Motvind Singeltall1.0075
Medvind Singeltall1.0068
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Coastal/Long Distance618.70.9697
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind595.51.0075
Predominantly Downwind596.01.0068
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore551.01.0890
Cape Doctor Coastal465.91.2878
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8129
Triple Number Coastal/Long Distance Medium1.0649
Triple Number Coastal/Long Distance High1.2068
Triple Number Windward/Leeward Low0.6258
Triple Number Windward/Leeward Medium0.8706
Triple Number Windward/Leeward High1.0229
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8129
Triple Number Coastal/Long Distance Medium1.0649
Triple Number Coastal/Long Distance High1.2068
Triple Number Windward/Leeward Low0.6258
Triple Number Windward/Leeward Medium0.8706
Triple Number Windward/Leeward High1.0229
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Predominantly Upwind595.51.0075
Predominantly Downwind596.01.0068
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance618.70.9697
Triple Number Coastal/Long Distance Low738.10.8129
Triple Number Coastal/Long Distance Medium563.41.0649
Triple Number Coastal/Long Distance High497.21.2068
Triple Number Windward/Leeward Low958.80.6258
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.61075.5803.3661.6581.7539.4508.2459.0438.6
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low738.10.8129
Triple Number AP Medium563.51.0648
Triple Number AP High497.21.2068
Triple Number Windward/Leeward Low1001.70.5990
Triple Number Windward/Leeward Medium689.20.8706
Triple Number Windward/Leeward High586.61.0229
Single Number Predominant Upwind617.70.9714
Single Number Predominant Reaching566.11.0598
Single Number Predominant Downwind624.80.9602
Predominant Upwind - Low848.50.7071
Predominant Upwind - Low/Med651.30.9212
Predominant Upwind - Medium575.61.0423
Predominant Upwind - Med/High537.21.1170
Predominant Upwind - High520.61.1526
Predominant Downwind Low948.20.6327
Predominant Downwind Low/Med687.90.8723
Predominant Downwind Medium571.91.0491
Predominant Downwind Med/High500.41.1991
Predominant Downwind High463.31.2949
Predominant Reaching Low794.60.7551
Predominant Reaching Low/Med605.50.9910
Predominant Reaching Medium528.01.1364
Predominant Reaching Med/High481.21.2470
Predominant Reaching High455.11.3184
SA/DSPL Upwind25.79SA/DSPL Downwind25.79
Scoring OptionTODTOT
5-Band Windward/Leeward Low1123.30.5341
5-Band Windward/Leeward Low/Med812.30.7387
5-Band Windward/Leeward Medium675.30.8885
5-Band Windward/Leeward Med/High596.31.0062
5-Band Windward/Leeward High564.01.0637
Windward/Leeward 60-40 Low1102.50.5442
Windward/Leeward 60-40 Low/Med806.30.7441
Windward/Leeward 60-40 Medium679.90.8825
Windward/Leeward 60-40 Med/High610.10.9834
Windward/Leeward 60-40 High582.91.0293
5-Band AP Low828.30.7244
5-Band AP Low/Med641.90.9347
5-Band AP Medium554.81.0815
5-Band AP Med/High504.41.1894
5-Band AP High478.91.2529
5-Band SF Bay Tour - Low958.50.6260
5-Band SF Bay Tour - Low/Med772.20.7770
5-Band SF Bay Tour - Medium651.60.9209
5-Band SF Bay Tour - Med/High584.71.0261
5-Band SF Bay Tour - High556.01.0792
Chicago-Mac Upwind0.9423
Chicago-Mac All Purpose0.9368
Chicago-Mac Downwind0.9207
Bayview-Mac Cove Island0.6769
Bayview-Mac Shore0.6855
Harvest Moon Regatta496.81.2078
Non Spin/HSFClub Certificate2025
FireflyGBR 3550L
ORC
Central Rating Office
Issuing certificates for
UNITED KINGDOM
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassX-35Measurement25/02/2013HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.600Max. Beam3.250Draft2.175Displacement4,651Wetted area22.84IMS L9.486LSM09.148Acc. length10.563Sink (kg/mm) 17.09
VCGD-0.236VCGM-0.262RM Rated (kg·m) 130.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight606Declared crew weight650
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.400PBWPIPA0.0033
EDL2.390ST10.042ST20.178
ST30.182ST40.110ST50.250
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P14.140IG14.450ISP14.530MDT10.125MDL10.184MDT20.118MDL20.140TL1.190MWGO
E4.800J4.200BAS1.770FSD0.035SFJSPLWPLTPSBD0.220MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered130.0Flotation Date09/01/2013
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
FireflyGBR 3550L
ORC
Central Rating Office
Issuing certificates for
UNITED KINGDOM
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment20180.211.051.843.154.0840.9624/06/2019
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment20180.100.621.172.233.254.2814.20NoNo 31.2601/07/2018
CRUISER/RACER REQUIREMENTS*
Accommodation length10.6 mTable area0.44 m²Headroom1.74 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity92 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity62 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.