Double HandedClub Certificate2025
BelliniNOR 11722
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 Angles43.1°43.1°41.3°40.5°40.4°40.5°40.8°41.5°43.7°
Beat VMG2.413.324.014.404.564.634.664.634.40
52°3.755.055.976.486.706.796.846.866.67
60°3.975.326.236.736.967.057.117.157.07
75°4.145.516.426.947.217.377.467.577.59
90°4.085.536.536.997.307.547.737.998.13
110°4.175.686.767.327.677.908.108.438.52
120°4.055.556.667.287.718.108.418.859.26
135°3.575.006.176.977.477.918.369.3610.58
150°2.944.215.336.276.957.407.788.589.62
Run VMG2.543.644.625.436.046.496.887.558.33
Gybe Angles143.0°143.0°147.4°149.4°152.0°156.7°161.2°160.8°145.6°
APH ToD:580.0CDL: 8.384APH ToT: 1.0344CertNo:10070
BOAT
ClassDEHLER 34 DDDesignerDehlerDesignBuilderDehler Segelyachten GmbHAge date01/2006Series date01/2002Offset fileDEH34N.OFFData file10070
HULL
Length Overall10.220 mMaximum Beam3.216 mDraft1.875 mDisplacement4,845 kgDLR5.3683IMS DivisionCruiser/RacerDynamic Allowance0.240%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight160 kg(declared)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail31.4831.90Headsail Luffed26.8526.85Headsail FlyingSymmetricAsymmetric83.7183.71 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail9.89Storm Jib9.43Heavy Weather Jib25.46
SAIL LIMITS
Headsails5Spinnakers4
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.
Double HandedClub Certificate2025
BelliniNOR 11722
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 VMG1491.41083.1897.2817.7789.4777.8773.2777.6818.2
52°961.0712.7603.1555.2537.7530.2526.3524.9539.9
60°905.8677.2578.1534.7517.3510.3506.3503.5509.1
75°869.6653.6560.8518.8499.2488.4482.5475.6474.3
90°883.0651.2551.0515.2493.5477.5465.6450.6443.1
110°863.6633.9532.4491.7469.1455.7444.6427.0422.4
120°888.8648.2540.2494.4466.9444.3428.1406.7389.0
135°1009.6720.5583.9516.3482.1455.2430.8384.5340.1
150°1225.1856.1675.3573.9517.7486.7462.8419.4374.2
Run VMG1414.7988.5779.8662.7596.1554.8523.4476.7432.1
Selected Courses
Windward / Leeward1452.41035.8838.5740.2692.8666.3648.3627.1625.2
All purpose1103.5799.0658.6593.1561.5542.8529.7512.1507.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward720.90.8322
All purpose580.01.0344
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7100
Downwind "popa"0.9166
70% up, 30% down "Ilhabela"0.7615
30% up, 70% down "Ilhabela-inverso"0.8430
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Predominantly Upwind635.20.9446
Predominantly Downwind577.31.0393
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low728.80.8233
Triple Number AP Medium575.51.0425
Triple Number AP High526.41.1399
Triple Number Windward/Leeward Low978.90.6129
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Single Number Predominant Upwind661.70.9068
Single Number Predominant Reaching572.01.0490
Single Number Predominant Downwind602.80.9954
Predominant Upwind - Low888.00.6757
Predominant Upwind - Low/Med686.50.8740
Predominant Upwind - Medium617.70.9714
Predominant Upwind - Med/High587.51.0213
Predominant Upwind - High578.51.0371
Predominant Downwind Low867.60.6916
Predominant Downwind Low/Med647.00.9274
Predominant Downwind Medium559.11.0732
Predominant Downwind Med/High505.61.1868
Predominant Downwind High472.11.2710
Predominant Reaching Low781.40.7678
Predominant Reaching Low/Med601.70.9972
Predominant Reaching Medium535.91.1196
Predominant Reaching Med/High497.71.2056
Predominant Reaching High475.31.2622
SA/DSPL Upwind20.26SA/DSPL Downwind40.02
Scoring OptionTODTOT
5-Band Windward/Leeward Low1090.80.5501
5-Band Windward/Leeward Low/Med811.40.7395
5-Band Windward/Leeward Medium704.60.8516
5-Band Windward/Leeward Med/High651.50.9210
5-Band Windward/Leeward High630.50.9517
Windward/Leeward 60-40 Low1100.40.5453
Windward/Leeward 60-40 Low/Med825.20.7271
Windward/Leeward 60-40 Medium723.60.8292
Windward/Leeward 60-40 Med/High676.40.8870
Windward/Leeward 60-40 High661.10.9075
5-Band AP Low801.60.7485
5-Band AP Low/Med641.90.9348
5-Band AP Medium569.01.0544
5-Band AP Med/High531.61.1286
5-Band AP High514.31.1667
5-Band SF Bay Tour - Low942.80.6364
5-Band SF Bay Tour - Low/Med777.00.7722
5-Band SF Bay Tour - Medium680.30.8819
5-Band SF Bay Tour - Med/High633.30.9474
5-Band SF Bay Tour - High614.50.9764
Chicago-Mac Upwind0.8830
Chicago-Mac All Purpose0.9239
Chicago-Mac Downwind0.9620
Bayview-Mac Cove Island0.6840
Bayview-Mac Shore0.6883
Harvest Moon Regatta497.91.2050
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance630.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating630.70.9513
FinRating, kevyt tuuli1069.90.9346
FinRating, kova tuuli517.60.9660
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9513
Triple Number Coastal/Long Distance Low0.8233
Triple Number Coastal/Long Distance Medium1.0426
Triple Number Coastal/Long Distance High1.1399
Triple Number Windward/Leeward Low0.6402
Triple Number Windward/Leeward Medium0.8402
Triple Number Windward/Leeward High0.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
For information
General Purpose Handicap (GPH)647.3
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low728.8
Triple Number Coastal/Long Distance Medium575.5
Triple Number Coastal/Long Distance High526.4
Triple Number Windward/Leeward Low937.2
Triple Number Windward/Leeward Medium714.1
Triple Number Windward/Leeward High644.9
Predominantly Upwind635.2
Predominantly Downwind577.3
Predominantly Reaching556.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8233
Triple Number Coastal/Long Distance Medium1.0426
Triple Number Coastal/Long Distance High1.1399
Triple Number Windward/Leeward Low0.6402
Triple Number Windward/Leeward Medium0.8402
Triple Number Windward/Leeward High0.9304
Coastal/Long Distance0.9513
Predominantly Upwind0.9446
Predominantly Downwind1.0393
For information
General Purpose Handicap (GPH)647.3
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0344
Distanseseilas Trippeltall svak vind0.8233
Distanseseilas Trippeltall mellomvind1.0426
Distanseseilas Trippeltall sterk vind1.1399
Pølsebane Trippeltall svak vind0.6402
Pølsebane Trippeltall mellomvind0.8402
Pølsebane Trippeltall sterk vind0.9304
Motvind Singeltall0.9446
Medvind Singeltall1.0393
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Coastal/Long Distance630.70.9513
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind635.20.9446
Predominantly Downwind577.31.0393
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore625.80.9588
Cape Doctor Coastal508.61.1796
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8233
Triple Number Coastal/Long Distance Medium1.0426
Triple Number Coastal/Long Distance High1.1399
Triple Number Windward/Leeward Low0.6402
Triple Number Windward/Leeward Medium0.8402
Triple Number Windward/Leeward High0.9304
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8233
Triple Number Coastal/Long Distance Medium1.0426
Triple Number Coastal/Long Distance High1.1399
Triple Number Windward/Leeward Low0.6402
Triple Number Windward/Leeward Medium0.8402
Triple Number Windward/Leeward High0.9304
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Predominantly Upwind635.20.9446
Predominantly Downwind577.31.0393
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance630.70.9513
Triple Number Coastal/Long Distance Low728.80.8233
Triple Number Coastal/Long Distance Medium575.51.0426
Triple Number Coastal/Long Distance High526.41.1399
Triple Number Windward/Leeward Low937.20.6402
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1534.71031.1788.0667.4600.9563.5533.1485.0475.6
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low728.80.8233
Triple Number AP Medium575.51.0425
Triple Number AP High526.41.1399
Triple Number Windward/Leeward Low978.90.6129
Triple Number Windward/Leeward Medium714.10.8402
Triple Number Windward/Leeward High644.90.9304
Single Number Predominant Upwind661.70.9068
Single Number Predominant Reaching572.01.0490
Single Number Predominant Downwind602.80.9954
Predominant Upwind - Low888.00.6757
Predominant Upwind - Low/Med686.50.8740
Predominant Upwind - Medium617.70.9714
Predominant Upwind - Med/High587.51.0213
Predominant Upwind - High578.51.0371
Predominant Downwind Low867.60.6916
Predominant Downwind Low/Med647.00.9274
Predominant Downwind Medium559.11.0732
Predominant Downwind Med/High505.61.1868
Predominant Downwind High472.11.2710
Predominant Reaching Low781.40.7678
Predominant Reaching Low/Med601.70.9972
Predominant Reaching Medium535.91.1196
Predominant Reaching Med/High497.71.2056
Predominant Reaching High475.31.2622
SA/DSPL Upwind20.26SA/DSPL Downwind40.02
Scoring OptionTODTOT
5-Band Windward/Leeward Low1090.80.5501
5-Band Windward/Leeward Low/Med811.40.7395
5-Band Windward/Leeward Medium704.60.8516
5-Band Windward/Leeward Med/High651.50.9210
5-Band Windward/Leeward High630.50.9517
Windward/Leeward 60-40 Low1100.40.5453
Windward/Leeward 60-40 Low/Med825.20.7271
Windward/Leeward 60-40 Medium723.60.8292
Windward/Leeward 60-40 Med/High676.40.8870
Windward/Leeward 60-40 High661.10.9075
5-Band AP Low801.60.7485
5-Band AP Low/Med641.90.9348
5-Band AP Medium569.01.0544
5-Band AP Med/High531.61.1286
5-Band AP High514.31.1667
5-Band SF Bay Tour - Low942.80.6364
5-Band SF Bay Tour - Low/Med777.00.7722
5-Band SF Bay Tour - Medium680.30.8819
5-Band SF Bay Tour - Med/High633.30.9474
5-Band SF Bay Tour - High614.50.9764
Chicago-Mac Upwind0.8830
Chicago-Mac All Purpose0.9239
Chicago-Mac Downwind0.9620
Bayview-Mac Cove Island0.6840
Bayview-Mac Shore0.6883
Harvest Moon Regatta497.91.2050
Double HandedClub Certificate2025
BelliniNOR 11722
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDEHLER 34 DDMeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.220Max. Beam3.216Draft1.875Displacement4,845Wetted area23.14IMS L9.611LSM09.663Acc. length10.220Sink (kg/mm) 17.44
VCGD0.060VCGM0.079RM Rated (kg·m) 89.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weight160
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0034
EDL1.640ST10.042ST20.180
ST30.180ST40.112ST50.290
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P12.550IG13.660ISP13.660MDT10.100MDL10.180MDT20.100MDL20.150TL0.000MW0.180GO0.200
E4.500J3.780BAS1.680FSDFoilSFJ0.000SPL0.000WPLTPS4.600BD0.000MWT144.50MCG4.570
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.060Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
BelliniNOR 11722
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment306-2015081108430.130.801.472.643.6131.4811/08/2015ODK103298-001
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment306-2015081108450.080.611.152.133.053.9712.92NoNo 26.8511/08/2015ODK103298-002
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment401-20080809140614.8012.3213.567.785.92131%83.7109/08/2008
CRUISER/RACER REQUIREMENTS*
Accommodation length10.2 mTable area0.44 m²Headroom1.72 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity84 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity54 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.