Club Certificate2026
RamonaFIN 6283
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
00210 HELSINKI
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 Angles46.5°43.3°41.3°40.0°39.6°39.2°39.0°39.2°40.4°
Beat VMG2.383.303.934.324.504.584.624.634.54
52°3.755.025.806.216.406.486.536.576.56
60°4.045.276.006.376.556.656.706.766.77
75°4.245.446.146.496.706.856.957.077.14
90°4.135.356.206.626.856.987.127.387.56
110°3.975.406.306.737.047.327.597.958.18
120°3.835.256.186.666.997.317.658.238.54
135°3.354.735.746.396.777.097.438.178.79
150°2.774.025.035.866.436.787.097.788.47
Run VMG2.403.484.365.115.786.286.647.227.87
Gybe Angles139.9°144.4°148.5°154.7°163.5°170.9°178.1°178.1°177.2°
APH ToD:609.5CDL: 7.556APH ToT: 0.9845CertNo:
BOAT
ClassInferno 31DesignerHåkan SödergrenBuilder-Age date01/1988Series date01/1985Offset fileINFERNO-31 NR.offData fileFIN6283
HULL
Length Overall9.450 mMaximum Beam3.018 mDraft1.643 mDisplacement4,420 kgDLR8.3469IMS DivisionCruiser/RacerDynamic Allowance0.160%Age Allowance0.650%RS Assessment-0.254%
PROPELLER
InstallationStrutTypeFolding 3 bladesDiameter0.385m
CREW
Maximum weight450 kg(declared)Minimum weight320 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail30.5131.09Headsail Luffed30.5330.53Headsail FlyingSymmetric69.8369.83Asymmetric66.7066.70 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS Maximum (m²)
Trysail8.99Storm Jib6.91Heavy Weather Jib18.64
SAIL LIMITS
Headsails5Spinnakers4
✱ Asymmetric SHALL NOT be tacked on the pole
STABILITY
Righting Moment 77.7 kg·m Stability Index 124.1
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  04140004P6L Issued on 08/05/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
RamonaFIN 6283
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
00210 HELSINKI
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 VMG1513.91089.5915.9833.3800.5785.7778.8776.9792.8
52°960.6717.3620.7579.7562.3555.2551.3547.7549.1
60°891.8683.1599.9565.5549.3541.5537.3532.3531.7
75°849.6661.9586.3554.5537.0525.5518.1509.0504.0
90°872.1672.5580.7544.1525.5515.4505.5487.6476.2
110°906.7666.5571.7535.1511.6491.5474.0453.1440.3
120°938.9686.4582.4540.8515.2492.4470.7437.3421.4
135°1074.4761.1626.7563.1531.7507.7484.3440.9409.5
150°1298.0896.3715.8614.6559.7530.7507.9463.0425.0
Run VMG1498.81035.0826.5705.0623.0573.6541.8498.4457.5
Selected Courses
Windward / Leeward1506.31062.3871.2769.2711.8679.7660.3637.7625.1
All purpose1135.2821.6689.2625.3591.4571.7557.7537.5526.4
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward741.40.8092
All purpose609.50.9845
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.7023
Downwind "popa"0.8744
70% up, 30% down "Ilhabela"0.7463
30% up, 70% down "Ilhabela-inverso"0.8145
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Predominantly Upwind659.70.9095
Predominantly Downwind612.30.9800
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP633.40.9473 Predom. Rc High510.81.1746 5B SF Bay L/M802.70.7475 TriNum AP Low755.40.7943 Predom. Dn Low905.60.6625 5B SF Bay Med704.10.8521 TriNum AP Med606.00.9901 Predom. Dn L/M683.30.8781 5B SF Bay M/H651.70.9207 TriNum AP High553.61.0837 Predom. Dn Med593.71.0106 5B SF Bay High628.90.9540 TriNum W/L Low1010.50.5938 Predom. Dn M/H538.91.1133 5B AP Low829.30.7235 TriNum W/L Med736.20.8150 Predom. Dn High506.31.1851 5B AP L/M671.70.8932 TriNum W/L Hig656.70.9137 ChiMac Up Low807.80.7427 5B AP Med599.11.0016 Predom. Upwind684.50.8765 ChiMac Up Med738.90.8120 5B AP M/H559.51.0724 Predom. Reaching604.80.9920 ChiMac Up High659.50.9098 5B AP High539.11.1130 Predom. Downwind638.20.9402 ChiMac Off Low787.20.7622 5B W/L Low1125.50.5331 Predom. Up Low906.50.6619 ChiMac Off Med702.60.8540 5B W/L L/M839.80.7144 Predom. Up L/M710.40.8446 ChiMac Off High602.60.9957 5B W/L Med724.90.8277 Predom. Up Med642.30.9342 ChiMac AP Low793.90.7558 5B W/L M/H664.00.9035 Predom. Up M/H610.80.9823 ChiMac AP Med718.20.8355 5B W/L High639.40.9384 Predom. Up High598.01.0033 ChiMac AP High629.40.9532 W/L 60-40 Low1130.90.5306 Predom. Rc Low807.20.7433 BayMac Cove Island907.20.6614 W/L 60-40 L/M850.90.7051 Predom. Rc L/M633.10.9477 BayMac Shore899.90.6667 W/L 60-40 Med742.20.8084 Predom. Rc Med569.91.0529 Harvest Moon540.71.1096 W/L 60-40 M/H687.50.8727 Predom. Rc M/H533.71.1243 5B SF Bay Low954.70.6285 W/L 60-40 High667.50.8989      SA/DSPL Up22.55SA/DSPL Dn37.07
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance661.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating661.00.9077
FinRating, kevyt tuuli1105.90.9042
FinRating, kova tuuli542.80.9211
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.9077
Triple Number Coastal/Long Distance Low0.7943
Triple Number Coastal/Long Distance Medium0.9902
Triple Number Coastal/Long Distance High1.0837
Triple Number Windward/Leeward Low0.6206
Triple Number Windward/Leeward Medium0.8150
Triple Number Windward/Leeward High0.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
For information
General Purpose Handicap (GPH)677.7
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Saronikos S All Purpose687.80.8723
Saronikos S Upwind770.80.7784
Saronikos S Downwind582.81.0295
Saronikos N All Purpose720.10.8332
Saronikos N Upwind801.00.7490
Saronikos N Downwind630.80.9511
Saronikos SW All Purpose690.10.8695
Saronikos SW Upwind784.60.7647
Saronikos SW Downwind591.41.0145
Saronikos NE All Purpose739.20.8117
Saronikos NE Upwind750.80.7992
Saronikos NE Downwind700.10.8570
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose633.40.9473
5-Band All Purpose Low902.10.6652
5-Band All Purpose L/M694.90.8634
5-Band All Purpose Med616.90.9726
5-Band All Purpose M/H574.21.0449
5-Band All Purpose High551.81.0873
Single Number Predominant Upwind658.30.9115
Single Number Predominant Reaching583.61.0282
Single Number Predominant Downwind613.10.9786
5-Band 50-50 Windward/Leeward Low1125.50.5331
5-Band 50-50 Windward/Leeward L/M839.80.7144
5-Band 50-50 Windward/Leeward Med724.90.8277
5-Band 50-50 Windward/Leeward M/H664.00.9035
5-Band 50-50 Windward/Leeward High639.40.9384
5-Band 60-40 Windward/Leeward Low1130.90.5306
5-Band 60-40 Windward/Leeward L/M850.90.7051
5-Band 60-40 Windward/Leeward Med742.20.8084
5-Band 60-40 Windward/Leeward M/H687.50.8727
5-Band 60-40 Windward/Leeward High667.50.8989
Triple Number 50-50 Windward/Leeward Low1010.50.5938
Triple Number 50-50 Windward/Leeward Med736.30.8149
Triple Number 50-50 Windward/Leeward High656.60.9137
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward758.50.7910
Triple Number 60-40 Windward/Leeward Low1017.50.5897
Triple Number 60-40 Windward/Leeward Med752.50.7974
Triple Number 60-40 Windward/Leeward High681.30.8807
Triple Number All-Purpose Low817.60.7338
Triple Number All-Purpose Med624.30.9610
Triple Number All-Purpose High567.91.0566
Triple Number Predominant Upwind Low832.40.7208
Triple Number Predominant Upwind Med650.70.9221
Triple Number Predominant Upwind High613.60.9779
Triple Number Predominant Reaching Low740.40.8103
Triple Number Predominant Reaching Med584.81.0260
Triple Number Predominant Reaching High518.51.1571
Triple Number Predominant Downwind Low814.80.7364
Triple Number Predominant Downwind Med602.50.9958
Triple Number Predominant Downwind High518.91.1563
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low755.4
Triple Number Coastal/Long Distance Medium605.9
Triple Number Coastal/Long Distance High553.7
Triple Number Windward/Leeward Low966.8
Triple Number Windward/Leeward Medium736.2
Triple Number Windward/Leeward High656.7
Predominantly Upwind659.7
Predominantly Downwind612.3
Predominantly Reaching591.2
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.7943
Triple Number Coastal/Long Distance Medium0.9902
Triple Number Coastal/Long Distance High1.0837
Triple Number Windward/Leeward Low0.6206
Triple Number Windward/Leeward Medium0.8150
Triple Number Windward/Leeward High0.9137
Coastal/Long Distance0.9077
Predominantly Upwind0.9095
Predominantly Downwind0.9800
For information
General Purpose Handicap (GPH)677.7
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)0.9845
Distanseseilas Trippeltall svak vind0.7943
Distanseseilas Trippeltall mellomvind0.9902
Distanseseilas Trippeltall sterk vind1.0837
Pølsebane Trippeltall svak vind0.6206
Pølsebane Trippeltall mellomvind0.8150
Pølsebane Trippeltall sterk vind0.9137
Motvind Singeltall0.9095
Medvind Singeltall0.9800
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Coastal/Long Distance661.00.9077
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind659.70.9095
Predominantly Downwind612.30.9800
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore628.90.9541
Cape Doctor Coastal529.71.1327
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.7943
Triple Number Coastal/Long Distance Medium0.9902
Triple Number Coastal/Long Distance High1.0837
Triple Number Windward/Leeward Low0.6206
Triple Number Windward/Leeward Medium0.8150
Triple Number Windward/Leeward High0.9137
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.7943
Triple Number Coastal/Long Distance Medium0.9902
Triple Number Coastal/Long Distance High1.0837
Triple Number Windward/Leeward Low0.6206
Triple Number Windward/Leeward Medium0.8150
Triple Number Windward/Leeward High0.9137
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Predominantly Upwind659.70.9095
Predominantly Downwind612.30.9800
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance661.00.9077
Triple Number Coastal/Long Distance Low755.40.7943
Triple Number Coastal/Long Distance Medium605.90.9902
Triple Number Coastal/Long Distance High553.71.0837
Triple Number Windward/Leeward Low966.80.6206
Triple Number Windward/Leeward Medium736.20.8150
Triple Number Windward/Leeward High656.70.9137
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1505.61059.5820.9698.5629.8593.1563.5513.7501.0
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP633.40.9473 Predom. Dn High506.31.1851 5B AP M/H559.51.0724 TriNum AP Low755.40.7943 Predom. Rc Low807.20.7433 5B AP High539.11.1130 TriNum AP Med606.00.9901 Predom. Rc L/M633.10.9477 5B SF Bay Low954.70.6285 TriNum AP High553.61.0837 Predom. Rc Med569.91.0529 5B SF Bay L/M802.70.7475 TriNum W/L Low1010.50.5938 Predom. Rc M/H533.71.1243 5B SF Bay Med704.10.8521 TriNum W/L Med736.20.8150 Predom. Rc High510.81.1746 5B SF Bay M/H651.70.9207 TriNum W/L Hig656.70.9137 5B W/L Low1125.50.5331 5B SF Bay High628.90.9540 Predom. Upwind684.50.8765 5B W/L L/M839.80.7144 ChiMac Up Low807.80.7427 Predom. Reaching604.80.9920 5B W/L Med724.90.8277 ChiMac Up Med738.90.8120 Predom. Downwind638.20.9402 5B W/L M/H664.00.9035 ChiMac Up High659.50.9098 Predom. Up Low906.50.6619 5B W/L High639.40.9384 ChiMac Off Low787.20.7622 Predom. Up L/M710.40.8446 W/L 60-40 Low1130.90.5306 ChiMac Off Med702.60.8540 Predom. Up Med642.30.9342 W/L 60-40 L/M850.90.7051 ChiMac Off High602.60.9957 Predom. Up M/H610.80.9823 W/L 60-40 Med742.20.8084 ChiMac AP Low793.90.7558 Predom. Up High598.01.0033 W/L 60-40 M/H687.50.8727 ChiMac AP Med718.20.8355 Predom. Dn Low905.60.6625 W/L 60-40 High667.50.8989 ChiMac AP High629.40.9532 Predom. Dn L/M683.30.8781 5B AP Low829.30.7235 BayMac Cove Island907.20.6614 Predom. Dn Med593.71.0106 5B AP L/M671.70.8932 BayMac Shore899.90.6667 Predom. Dn M/H538.91.1133 5B AP Med599.11.0016 Harvest Moon540.71.1096      SA/DSPL Up22.55SA/DSPL Dn37.07
ORC Ref  04140004P6L Issued on 08/05/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
RamonaFIN 6283
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassInferno 31MeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
Length overall9.450Maximum beam3.018Draft1.643Displacement4,420Wetted area19.70IMS L8.153LSM08.090Accomod. length9.450Sink (kg/mm) 14.56
VCGD-0.055VCGM-0.039 RM Rated (kg·m) 77.7Limit of positive stability(°) 121.2 Stability Index 124.1 BLR index 0.0000Default crew weight509 Declared crew weight 450
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeFolding 3 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.385PBW0.100PIPA0.0033
EDL0.880ST10.048ST20.170
ST30.170ST40.098ST50.290
RIG
BackstayAdjustableForestayFixedInner forestayNot installedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysYesCheckstaysNoSpreaders1Rotating mastNo
P12.100IG11.683ISP12.273MDT10.110MDL10.170MDT20.110MDL20.125TL2.485MW0.125GO0.145
E4.245J3.615BAS1.468FSD0.025SFJ0.225SPL3.550WPLTPS4.115BD0.130MWT119.00MCG4.051
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date18/04/2022
SFFP0.593FFMFF1.217LCFcl5.511SG
SAFP8.565FAMFA0.939LCFsh5.716HBI1.044
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04140004P6L Issued on 08/05/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
RamonaFIN 6283
Avomeripurjehtijat ry
c/o Helsingfors Segelklubb ry
Vattuniemen puistotie 1
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment4TForte0.310.921.582.683.5630.5108/03/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentG1L0.130.721.352.623.935.2511.55NoNo 30.5328/02/2023G1M0.060.641.242.493.835.1411.50NoNo 29.2306/05/2023G20.080.611.172.353.554.8511.29NoNo 26.9406/05/2023G30.140.611.111.982.893.8411.55YesNo 22.9130/05/2020G3H0.070.470.901.802.793.8211.56YesNo 21.5306/05/2023
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS112.2512.2512.256.956.4069.8329/03/2023Light RunnerS211.5411.5411.546.206.3259.8525/10/2020Heavy Runner
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentAssy13.2011.1512.186.546.7197%66.7001/02/2023
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
CRUISER/RACER REQUIREMENTS*
Accommodation length9.4 mTable area0.44 m²Headroom1.66 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity68 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity38 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.
ORC Ref  04140004P6L Issued on 08/05/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org