Club Certificate2025
IL QUATTROFRA-46388
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
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 Angles43.3°43.3°41.9°40.8°39.2°38.1°38.6°39.7°41.5°
Beat VMG2.082.833.403.814.124.324.394.384.32
52°3.204.305.075.565.886.106.236.316.36
60°3.394.525.285.736.036.296.486.646.71
75°3.504.645.415.896.196.516.807.177.33
90°3.644.895.766.276.686.927.127.557.98
110°3.735.005.866.416.947.457.928.629.27
120°3.534.825.766.306.857.397.989.3510.49
135°3.134.355.326.006.507.017.568.9511.94
150°2.653.734.665.446.006.416.837.759.81
Run VMG2.293.234.044.715.235.625.986.728.49
Gybe Angles146.5°146.5°148.6°149.2°154.6°160.0°159.1°154.1°136.7°
APH ToD:654.1CDL: 6.205APH ToT: 0.9172CertNo:25336a
BOAT
ClassDJANGO 670DesignerROLLAND PierreBuilderMAREE HAUTEAge date01/2017Series date01/2014Offset fileDJA67NEW2rNew.offData fileF46388_25336a
HULL
Length Overall6.500 mMaximum Beam2.996 mDraft1.607 mDisplacement1,525 kgDLR5.0789IMS DivisionSportboatDynamic Allowance0.190%Age Allowance0.357%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight388 kg(default)Minimum weight258 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail21.2421.93Headsail Luffed14.4014.40Headsail FlyingSymmetricAsymmetric56.1556.15 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail5.41Storm Jib3.93Heavy Weather Jib10.59
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
2025: New DSPL / Meas. DSPL / Headsail furler / From:F9794_22322.dxt
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
IL QUATTROFRA-46388
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
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 VMG1732.81271.21059.0945.4873.2832.5819.6821.4832.6
52°1124.4836.9709.6647.3612.6590.2578.0570.3565.8
60°1063.0797.0681.9628.0596.8572.7555.4541.9536.2
75°1029.3775.1665.3611.4581.2552.7529.2502.1491.1
90°988.2735.6625.5574.4539.0519.9505.8477.1451.2
110°963.9720.0614.0561.7518.6483.4454.7417.7388.2
120°1019.9746.8625.3571.1525.9487.1450.9384.9343.1
135°1148.8827.7676.9599.6554.0513.3476.0402.1301.6
150°1360.9964.9772.0661.7600.1561.9526.9464.4367.1
Run VMG1572.31114.1891.4764.1688.0640.1602.2535.4423.9
Selected Courses
Windward / Leeward1651.91192.7975.2854.7780.6736.3710.9678.4628.2
All purpose1261.6922.3766.0684.4633.4599.2575.6542.6505.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward814.50.7366
All purpose654.10.9172
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6342
Downwind "popa"0.8023
70% up, 30% down "Ilhabela"0.6767
30% up, 70% down "Ilhabela-inverso"0.7432
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Predominantly Upwind717.90.8358
Predominantly Downwind657.80.9122
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low844.20.7108
Triple Number AP Medium653.00.9189
Triple Number AP High569.11.0543
Triple Number Windward/Leeward Low1128.80.5316
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Single Number Predominant Upwind744.60.8058
Single Number Predominant Reaching641.70.9350
Single Number Predominant Downwind681.20.8808
Predominant Upwind - Low1030.10.5824
Predominant Upwind - Low/Med794.10.7556
Predominant Upwind - Medium694.90.8634
Predominant Upwind - Med/High638.90.9391
Predominant Upwind - High615.00.9755
Predominant Downwind Low990.10.6060
Predominant Downwind Low/Med743.60.8069
Predominant Downwind Medium635.90.9435
Predominant Downwind Med/High561.41.0687
Predominant Downwind High504.31.1898
Predominant Reaching Low895.10.6703
Predominant Reaching Low/Med689.50.8702
Predominant Reaching Medium602.80.9953
Predominant Reaching Med/High544.91.1012
Predominant Reaching High503.61.1914
SA/DSPL Upwind26.87SA/DSPL Downwind58.33
Scoring OptionTODTOT
5-Band Windward/Leeward Low1253.30.4787
5-Band Windward/Leeward Low/Med936.00.6410
5-Band Windward/Leeward Medium795.90.7538
5-Band Windward/Leeward Med/High715.50.8386
5-Band Windward/Leeward High675.30.8884
Windward/Leeward 60-40 Low1269.30.4727
Windward/Leeward 60-40 Low/Med953.40.6293
Windward/Leeward 60-40 Medium814.60.7365
Windward/Leeward 60-40 Med/High737.70.8133
Windward/Leeward 60-40 High704.90.8512
5-Band AP Low922.60.6503
5-Band AP Low/Med740.70.8101
5-Band AP Medium642.40.9340
5-Band AP Med/High578.91.0365
5-Band AP High541.91.1072
5-Band SF Bay Tour - Low1090.70.5501
5-Band SF Bay Tour - Low/Med897.50.6685
5-Band SF Bay Tour - Medium767.30.7820
5-Band SF Bay Tour - Med/High691.10.8682
5-Band SF Bay Tour - High652.80.9192
Chicago-Mac Upwind0.7779
Chicago-Mac All Purpose0.8145
Chicago-Mac Downwind0.8465
Bayview-Mac Cove Island0.5987
Bayview-Mac Shore0.6024
Harvest Moon Regatta553.51.0841
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance712.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating712.70.8419
FinRating, kevyt tuuli1226.40.8154
FinRating, kova tuuli539.50.9267
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8419
Triple Number Coastal/Long Distance Low0.7108
Triple Number Coastal/Long Distance Medium0.9190
Triple Number Coastal/Long Distance High1.0543
Triple Number Windward/Leeward Low0.5535
Triple Number Windward/Leeward Medium0.7403
Triple Number Windward/Leeward High0.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
For information
General Purpose Handicap (GPH)735.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low844.1
Triple Number Coastal/Long Distance Medium652.9
Triple Number Coastal/Long Distance High569.1
Triple Number Windward/Leeward Low1084.0
Triple Number Windward/Leeward Medium810.5
Triple Number Windward/Leeward High705.1
Predominantly Upwind717.9
Predominantly Downwind657.8
Predominantly Reaching629.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7108
Triple Number Coastal/Long Distance Medium0.9190
Triple Number Coastal/Long Distance High1.0543
Triple Number Windward/Leeward Low0.5535
Triple Number Windward/Leeward Medium0.7403
Triple Number Windward/Leeward High0.8510
Coastal/Long Distance0.8419
Predominantly Upwind0.8358
Predominantly Downwind0.9122
For information
General Purpose Handicap (GPH)735.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9172
Distanseseilas Trippeltall svak vind0.7108
Distanseseilas Trippeltall mellomvind0.9190
Distanseseilas Trippeltall sterk vind1.0543
Pølsebane Trippeltall svak vind0.5535
Pølsebane Trippeltall mellomvind0.7403
Pølsebane Trippeltall sterk vind0.8510
Motvind Singeltall0.8358
Medvind Singeltall0.9122
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Coastal/Long Distance712.70.8419
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind717.90.8358
Predominantly Downwind657.80.9122
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore643.30.9327
Cape Doctor Coastal516.91.1608
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7108
Triple Number Coastal/Long Distance Medium0.9190
Triple Number Coastal/Long Distance High1.0543
Triple Number Windward/Leeward Low0.5535
Triple Number Windward/Leeward Medium0.7403
Triple Number Windward/Leeward High0.8510
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7108
Triple Number Coastal/Long Distance Medium0.9190
Triple Number Coastal/Long Distance High1.0543
Triple Number Windward/Leeward Low0.5535
Triple Number Windward/Leeward Medium0.7403
Triple Number Windward/Leeward High0.8510
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Predominantly Upwind717.90.8358
Predominantly Downwind657.80.9122
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance712.70.8419
Triple Number Coastal/Long Distance Low844.10.7108
Triple Number Coastal/Long Distance Medium652.90.9190
Triple Number Coastal/Long Distance High569.11.0543
Triple Number Windward/Leeward Low1084.00.5535
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1737.91184.8915.4770.2677.5622.9580.3509.2472.4
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low844.20.7108
Triple Number AP Medium653.00.9189
Triple Number AP High569.11.0543
Triple Number Windward/Leeward Low1128.80.5316
Triple Number Windward/Leeward Medium810.50.7403
Triple Number Windward/Leeward High705.10.8510
Single Number Predominant Upwind744.60.8058
Single Number Predominant Reaching641.70.9350
Single Number Predominant Downwind681.20.8808
Predominant Upwind - Low1030.10.5824
Predominant Upwind - Low/Med794.10.7556
Predominant Upwind - Medium694.90.8634
Predominant Upwind - Med/High638.90.9391
Predominant Upwind - High615.00.9755
Predominant Downwind Low990.10.6060
Predominant Downwind Low/Med743.60.8069
Predominant Downwind Medium635.90.9435
Predominant Downwind Med/High561.41.0687
Predominant Downwind High504.31.1898
Predominant Reaching Low895.10.6703
Predominant Reaching Low/Med689.50.8702
Predominant Reaching Medium602.80.9953
Predominant Reaching Med/High544.91.1012
Predominant Reaching High503.61.1914
SA/DSPL Upwind26.87SA/DSPL Downwind58.33
Scoring OptionTODTOT
5-Band Windward/Leeward Low1253.30.4787
5-Band Windward/Leeward Low/Med936.00.6410
5-Band Windward/Leeward Medium795.90.7538
5-Band Windward/Leeward Med/High715.50.8386
5-Band Windward/Leeward High675.30.8884
Windward/Leeward 60-40 Low1269.30.4727
Windward/Leeward 60-40 Low/Med953.40.6293
Windward/Leeward 60-40 Medium814.60.7365
Windward/Leeward 60-40 Med/High737.70.8133
Windward/Leeward 60-40 High704.90.8512
5-Band AP Low922.60.6503
5-Band AP Low/Med740.70.8101
5-Band AP Medium642.40.9340
5-Band AP Med/High578.91.0365
5-Band AP High541.91.1072
5-Band SF Bay Tour - Low1090.70.5501
5-Band SF Bay Tour - Low/Med897.50.6685
5-Band SF Bay Tour - Medium767.30.7820
5-Band SF Bay Tour - Med/High691.10.8682
5-Band SF Bay Tour - High652.80.9192
Chicago-Mac Upwind0.7779
Chicago-Mac All Purpose0.8145
Chicago-Mac Downwind0.8465
Bayview-Mac Cove Island0.5987
Bayview-Mac Shore0.6024
Harvest Moon Regatta553.51.0841
Club Certificate2025
IL QUATTROFRA-46388
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDJANGO 670MeasurementHIN1912Plan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA6.500Max. Beam2.996Draft1.607Displacement1,525Wetted area13.46IMS L6.560LSM06.696Acc. length6.500Sink (kg/mm) 10.79
VCGD0.050VCGM0.018RM Rated (kg·m) 51.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight388Declared crew weightN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionFixedInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P9.080IG9.210ISP9.410MDT10.075MDL10.116MDT20.075MDL20.116TLMW0.116GO
E3.400J2.890BAS0.905FSD0.031SFJSPLWPLTPS3.990BD0.104MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.050Flotation Date01/01/2013
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
IL QUATTROFRA-46388
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM11.131.311.762.452.9521.2411/03/2024Course
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentG13.039.34YesNo 14.4011/03/2024
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA111.2510.2110.736.256.4098%56.1511/03/2024Médium
CRUISER/RACER REQUIREMENTS*
Accommodation length6.5 mTable area0.22 m²Headroom1.40 mMinimum number of berths2Personal gear stowage0.08 m³Fresh water capacity5 lMinimum number of seats in cockpit2Food stowage0.12 m³Fuel capacity20 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.