Club Certificate2025
Big BlueCRO 2991
Hrvatski jedriličarski savez
Osječka 11
21000 Split
CROATIA
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 Angles45.4°45.4°43.5°41.6°40.7°40.1°39.8°39.7°41.2°
Beat VMG2.783.904.835.525.926.136.266.386.35
52°4.446.097.358.218.708.939.079.229.26
60°4.836.527.738.538.999.259.389.559.62
75°5.136.848.008.769.239.569.8110.1310.32
90°4.936.708.028.869.259.619.9810.5911.01
110°4.966.848.309.219.7910.2810.6211.2311.73
120°4.826.708.199.139.7610.3610.9511.8412.62
135°4.286.047.538.629.339.9210.5411.9713.87
150°3.545.056.397.558.529.199.7010.7412.13
Run VMG3.074.375.536.547.398.008.469.3210.51
Gybe Angles141.4°141.4°144.7°147.6°151.0°152.8°155.2°153.8°145.0°
APH ToD:459.6CDL: 13.641APH ToT: 1.3055CertNo:159/25
BOAT
ClassOceanis Yacht 54DesignerBiscontiniBuilderBenetteauAge date03/2022Series date01/2019Offset fileOY54CL.offData fileCRO2991
HULL
Length Overall15.980 mMaximum Beam5.000 mDraft2.425 mDisplacement16,965 kgDLR4.9516IMS DivisionCruiser/RacerDynamic Allowance0.220%Age Allowance0.195%
PROPELLER
InstallationShaft exposedTypeFolding 3 bladesDiameter0.504m
CREW
Maximum weight1,236 kg(default)Minimum weight1,051 kg ✱ when appliedNon Manual PowerSailsCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail80.5081.12Headsail Luffed79.6379.63Headsail FlyingSymmetricAsymmetric259.92259.92 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail25.98Storm Jib21.80Heavy Weather Jib58.85
SAIL LIMITS
Headsails8
✱ One set on the forestay
Spinnakers6
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.
Club Certificate2025
Big BlueCRO 2991
Hrvatski jedriličarski savez
Osječka 11
21000 Split
CROATIA
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 VMG1295.5923.7745.9652.6607.8587.3575.4564.4566.6
52°810.9591.3489.8438.5413.9402.9396.9390.4388.8
60°744.8552.5466.0422.0400.2389.3383.9376.8374.3
75°701.8526.6450.0411.2390.2376.8367.0355.5348.9
90°730.3537.2449.1406.1389.2374.5360.9339.8327.1
110°726.4526.0433.8390.9367.6350.3339.1320.6306.9
120°747.5537.2439.6394.3369.0347.5328.8304.1285.3
135°841.6595.9478.2417.5385.7362.9341.5300.7259.5
150°1017.0712.8563.6476.7422.4391.7371.3335.1296.7
Run VMG1174.3823.1650.8550.4487.3450.2425.6386.2342.7
Selected Courses
Windward / Leeward1234.8873.4698.4601.5547.6518.8500.5475.3454.6
All purpose929.7666.9542.2476.5441.7421.2406.9386.0369.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward575.71.0423
All purpose459.61.3055
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.9018
Downwind "popa"1.1130
70% up, 30% down "Ilhabela"0.9562
30% up, 70% down "Ilhabela-inverso"1.0399
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Predominantly Upwind501.91.1955
Predominantly Downwind465.61.2887
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low604.60.9924
Triple Number AP Medium456.61.3141
Triple Number AP High402.61.4902
Triple Number Windward/Leeward Low821.10.7307
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Single Number Predominant Upwind523.71.1456
Single Number Predominant Reaching455.81.3164
Single Number Predominant Downwind485.91.2349
Predominant Upwind - Low745.20.8051
Predominant Upwind - Low/Med557.41.0765
Predominant Upwind - Medium483.61.2407
Predominant Upwind - Med/High446.61.3434
Predominant Upwind - High429.51.3971
Predominant Downwind Low721.80.8313
Predominant Downwind Low/Med529.41.1333
Predominant Downwind Medium447.81.3398
Predominant Downwind Med/High397.71.5088
Predominant Downwind High365.11.6433
Predominant Reaching Low648.90.9247
Predominant Reaching Low/Med487.81.2299
Predominant Reaching Medium424.01.4152
Predominant Reaching Med/High385.51.5564
Predominant Reaching High360.41.6647
SA/DSPL Upwind24.03SA/DSPL Downwind51.08
Scoring OptionTODTOT
5-Band Windward/Leeward Low920.00.6522
5-Band Windward/Leeward Low/Med667.70.8985
5-Band Windward/Leeward Medium560.41.0707
5-Band Windward/Leeward Med/High503.31.1922
5-Band Windward/Leeward High476.11.2603
Windward/Leeward 60-40 Low930.50.6448
Windward/Leeward 60-40 Low/Med678.00.8850
Windward/Leeward 60-40 Medium572.41.0481
Windward/Leeward 60-40 Med/High518.31.1577
Windward/Leeward 60-40 High494.21.2140
5-Band AP Low665.20.9019
5-Band AP Low/Med522.61.1482
5-Band AP Medium449.51.3349
5-Band AP Med/High408.71.4681
5-Band AP High386.81.5511
5-Band SF Bay Tour - Low792.80.7568
5-Band SF Bay Tour - Low/Med637.80.9407
5-Band SF Bay Tour - Medium538.91.1133
5-Band SF Bay Tour - Med/High486.51.2334
5-Band SF Bay Tour - High460.91.3017
Chicago-Mac Upwind1.1062
Chicago-Mac All Purpose1.1494
Chicago-Mac Downwind1.1871
Bayview-Mac Cove Island0.8265
Bayview-Mac Shore0.8314
Harvest Moon Regatta392.51.5285
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance502.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating502.71.1935
FinRating, kevyt tuuli900.81.1102
FinRating, kova tuuli388.31.2878
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.1935
Triple Number Coastal/Long Distance Low0.9924
Triple Number Coastal/Long Distance Medium1.3142
Triple Number Coastal/Long Distance High1.4902
Triple Number Windward/Leeward Low0.7635
Triple Number Windward/Leeward Medium1.0509
Triple Number Windward/Leeward High1.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
For information
General Purpose Handicap (GPH)518.7
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low604.6
Triple Number Coastal/Long Distance Medium456.6
Triple Number Coastal/Long Distance High402.6
Triple Number Windward/Leeward Low785.9
Triple Number Windward/Leeward Medium570.9
Triple Number Windward/Leeward High495.6
Predominantly Upwind501.9
Predominantly Downwind465.6
Predominantly Reaching445.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9924
Triple Number Coastal/Long Distance Medium1.3142
Triple Number Coastal/Long Distance High1.4902
Triple Number Windward/Leeward Low0.7635
Triple Number Windward/Leeward Medium1.0509
Triple Number Windward/Leeward High1.2106
Coastal/Long Distance1.1935
Predominantly Upwind1.1955
Predominantly Downwind1.2887
For information
General Purpose Handicap (GPH)518.7
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.3055
Distanseseilas Trippeltall svak vind0.9924
Distanseseilas Trippeltall mellomvind1.3142
Distanseseilas Trippeltall sterk vind1.4902
Pølsebane Trippeltall svak vind0.7635
Pølsebane Trippeltall mellomvind1.0509
Pølsebane Trippeltall sterk vind1.2106
Motvind Singeltall1.1955
Medvind Singeltall1.2887
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Coastal/Long Distance502.71.1935
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind501.91.1955
Predominantly Downwind465.61.2887
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore460.81.3020
Cape Doctor Coastal374.71.6012
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9924
Triple Number Coastal/Long Distance Medium1.3142
Triple Number Coastal/Long Distance High1.4902
Triple Number Windward/Leeward Low0.7635
Triple Number Windward/Leeward Medium1.0509
Triple Number Windward/Leeward High1.2106
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9924
Triple Number Coastal/Long Distance Medium1.3142
Triple Number Coastal/Long Distance High1.4902
Triple Number Windward/Leeward Low0.7635
Triple Number Windward/Leeward Medium1.0509
Triple Number Windward/Leeward High1.2106
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Predominantly Upwind501.91.1955
Predominantly Downwind465.61.2887
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance502.71.1935
Triple Number Coastal/Long Distance Low604.60.9924
Triple Number Coastal/Long Distance Medium456.61.3142
Triple Number Coastal/Long Distance High402.61.4902
Triple Number Windward/Leeward Low785.90.7635
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1305.0868.4654.6539.5473.1437.6410.0366.8350.9
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low604.60.9924
Triple Number AP Medium456.61.3141
Triple Number AP High402.61.4902
Triple Number Windward/Leeward Low821.10.7307
Triple Number Windward/Leeward Medium570.91.0509
Triple Number Windward/Leeward High495.61.2106
Single Number Predominant Upwind523.71.1456
Single Number Predominant Reaching455.81.3164
Single Number Predominant Downwind485.91.2349
Predominant Upwind - Low745.20.8051
Predominant Upwind - Low/Med557.41.0765
Predominant Upwind - Medium483.61.2407
Predominant Upwind - Med/High446.61.3434
Predominant Upwind - High429.51.3971
Predominant Downwind Low721.80.8313
Predominant Downwind Low/Med529.41.1333
Predominant Downwind Medium447.81.3398
Predominant Downwind Med/High397.71.5088
Predominant Downwind High365.11.6433
Predominant Reaching Low648.90.9247
Predominant Reaching Low/Med487.81.2299
Predominant Reaching Medium424.01.4152
Predominant Reaching Med/High385.51.5564
Predominant Reaching High360.41.6647
SA/DSPL Upwind24.03SA/DSPL Downwind51.08
Scoring OptionTODTOT
5-Band Windward/Leeward Low920.00.6522
5-Band Windward/Leeward Low/Med667.70.8985
5-Band Windward/Leeward Medium560.41.0707
5-Band Windward/Leeward Med/High503.31.1922
5-Band Windward/Leeward High476.11.2603
Windward/Leeward 60-40 Low930.50.6448
Windward/Leeward 60-40 Low/Med678.00.8850
Windward/Leeward 60-40 Medium572.41.0481
Windward/Leeward 60-40 Med/High518.31.1577
Windward/Leeward 60-40 High494.21.2140
5-Band AP Low665.20.9019
5-Band AP Low/Med522.61.1482
5-Band AP Medium449.51.3349
5-Band AP Med/High408.71.4681
5-Band AP High386.81.5511
5-Band SF Bay Tour - Low792.80.7568
5-Band SF Bay Tour - Low/Med637.80.9407
5-Band SF Bay Tour - Medium538.91.1133
5-Band SF Bay Tour - Med/High486.51.2334
5-Band SF Bay Tour - High460.91.3017
Chicago-Mac Upwind1.1062
Chicago-Mac All Purpose1.1494
Chicago-Mac Downwind1.1871
Bayview-Mac Cove Island0.8265
Bayview-Mac Shore0.8314
Harvest Moon Regatta392.51.5285
Club Certificate2025
Big BlueCRO 2991
Hrvatski jedriličarski savez
Osječka 11
21000 Split
CROATIA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassOceanis Yacht 54Measurement06/09/2025HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA15.980Max. Beam5.000Draft2.425Displacement16,965Wetted area55.42IMS L15.210LSM015.074Acc. length15.980Sink (kg/mm) 43.68
VCGD0.028VCGM0.096RM Rated (kg·m) 595.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight1,236Declared crew weightN/A
PROPELLER
Propeller TypeFolding 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.504PBWPIPA0.0025
PSDPHDPHL
PSAESL
ST1ST2ST3
ST4ST5
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays2Checkstays0Spreaders3Rotating mastNo
P21.760IG20.770ISP23.710MDT10.150MDL10.280MDT20.150MDL20.280TLMW0.280GO0.315
E6.820J6.810BAS1.970FSD0.060SFJ0.000SPLWPLTPS7.810BD0.270MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date07/09/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
Big BlueCRO 2991
Hrvatski jedriličarski savez
Osječka 11
21000 Split
CROATIA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.101.162.113.855.3580.5005/09/2025
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment10.121.021.963.805.547.1321.45YesNo 79.6305/09/2025
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment124.9020.7022.8013.8013.20105%259.9205/09/2025Red
CRUISER/RACER REQUIREMENTS*
Accommodation length16.0 mTable area0.77 m²Headroom1.90 mMinimum number of berths7Personal gear stowage0.28 m³Fresh water capacity350 lMinimum number of seats in cockpit7Food stowage0.42 m³Fuel capacity170 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.