Club Certificate2025
somleNOR 7111
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 Angles44.1°44.1°42.3°40.4°39.0°38.3°38.0°37.9°39.5°
Beat VMG2.453.374.104.624.925.065.135.205.14
52°3.855.196.146.696.967.097.177.257.26
60°4.145.516.406.877.127.277.367.457.48
75°4.345.716.577.017.287.487.637.807.88
90°4.295.746.707.107.327.567.788.118.32
110°4.415.896.887.347.657.878.068.388.55
120°4.275.766.797.307.688.038.338.819.28
135°3.745.216.367.067.507.898.309.3310.84
150°3.114.425.586.527.127.537.918.7710.28
Run VMG2.693.834.835.686.366.897.298.018.90
Gybe Angles144.9°144.9°149.4°153.6°161.2°168.4°175.9°176.8°148.2°
APH ToD:559.3CDL: 8.925APH ToT: 1.0727CertNo:5635
BOAT
ClassOMEGA 36DesignerRonHollandBuilderOmega YachtsAge dateSeries date01/1986Offset fileL6347.BOFData file5635
HULL
Length Overall11.000 mMaximum Beam3.386 mDraft1.696 mDisplacement5,357 kgDLR6.5216IMS DivisionCruiser/RacerDynamic Allowance0.180%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight627 kg(default)Minimum weight497 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail40.4541.31Headsail Luffed28.0328.03Headsail FlyingSymmetric110.95110.95Asymmetric
STORM SAIL AREAS (m²)
Trysail11.60Storm Jib8.76Heavy Weather Jib23.63
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.
Club Certificate2025
somleNOR 7111
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 VMG1470.51067.3878.3779.2731.7712.1701.1692.8700.1
52°934.4693.0586.3538.5517.3507.5502.1496.5495.6
60°868.9653.7562.7524.4505.5495.0489.4482.9481.1
75°830.1630.2548.0513.7494.7481.3471.8461.8456.9
90°839.2627.0537.6507.0492.0476.4463.0443.7432.9
110°816.9610.7523.5490.8470.8457.2446.9429.4421.1
120°842.8624.9530.6493.1468.8448.6432.0408.7387.9
135°962.0691.1566.0509.7480.1456.0433.8386.0332.2
150°1157.6813.6645.4552.0505.6478.3455.1410.4350.2
Run VMG1337.0939.5745.2634.1566.1522.9493.6449.6404.3
Selected Courses
Windward / Leeward1403.21003.4811.7706.7648.9617.5597.3571.2552.2
All purpose1061.1772.9640.4575.6541.3521.1506.6485.0467.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward679.10.8835
All purpose559.31.0727
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7551
Downwind "popa"0.9653
70% up, 30% down "Ilhabela"0.8078
30% up, 70% down "Ilhabela-inverso"0.8909
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Predominantly Upwind608.60.9859
Predominantly Downwind558.91.0736
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low706.70.8491
Triple Number AP Medium556.01.0791
Triple Number AP High502.11.1949
Triple Number Windward/Leeward Low946.70.6338
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Single Number Predominant Upwind632.70.9483
Single Number Predominant Reaching555.81.0796
Single Number Predominant Downwind581.41.0321
Predominant Upwind - Low863.60.6947
Predominant Upwind - Low/Med664.70.9027
Predominant Upwind - Medium590.31.0164
Predominant Upwind - Med/High553.61.0839
Predominant Upwind - High536.71.1179
Predominant Downwind Low832.50.7207
Predominant Downwind Low/Med625.50.9593
Predominant Downwind Medium541.21.1086
Predominant Downwind Med/High487.81.2300
Predominant Downwind High451.81.3280
Predominant Reaching Low753.30.7965
Predominant Reaching Low/Med585.31.0251
Predominant Reaching Medium523.31.1467
Predominant Reaching Med/High484.61.2383
Predominant Reaching High458.11.3099
SA/DSPL Upwind22.24SA/DSPL Downwind49.18
Scoring OptionTODTOT
5-Band Windward/Leeward Low1055.60.5684
5-Band Windward/Leeward Low/Med778.90.7703
5-Band Windward/Leeward Medium662.50.9056
5-Band Windward/Leeward Med/High600.70.9989
5-Band Windward/Leeward High572.41.0482
Windward/Leeward 60-40 Low1068.60.5615
Windward/Leeward 60-40 Low/Med793.00.7566
Windward/Leeward 60-40 Medium679.20.8833
Windward/Leeward 60-40 Med/High621.40.9656
Windward/Leeward 60-40 High597.01.0050
5-Band AP Low772.10.7771
5-Band AP Low/Med622.40.9640
5-Band AP Medium549.01.0930
5-Band AP Med/High508.31.1803
5-Band AP High485.71.2353
5-Band SF Bay Tour - Low915.00.6558
5-Band SF Bay Tour - Low/Med748.10.8020
5-Band SF Bay Tour - Medium643.40.9325
5-Band SF Bay Tour - Med/High588.51.0196
5-Band SF Bay Tour - High561.61.0684
Chicago-Mac Upwind0.9203
Chicago-Mac All Purpose0.9601
Chicago-Mac Downwind0.9974
Bayview-Mac Cove Island0.7109
Bayview-Mac Shore0.7150
Harvest Moon Regatta490.41.2235
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance606.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating606.50.9893
FinRating, kevyt tuuli1033.50.9676
FinRating, kova tuuli488.51.0235
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9893
Triple Number Coastal/Long Distance Low0.8491
Triple Number Coastal/Long Distance Medium1.0793
Triple Number Coastal/Long Distance High1.1949
Triple Number Windward/Leeward Low0.6611
Triple Number Windward/Leeward Medium0.8904
Triple Number Windward/Leeward High1.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
For information
General Purpose Handicap (GPH)625.1
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low706.6
Triple Number Coastal/Long Distance Medium555.9
Triple Number Coastal/Long Distance High502.1
Triple Number Windward/Leeward Low907.6
Triple Number Windward/Leeward Medium673.9
Triple Number Windward/Leeward High592.6
Predominantly Upwind608.6
Predominantly Downwind558.9
Predominantly Reaching541.9
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8491
Triple Number Coastal/Long Distance Medium1.0793
Triple Number Coastal/Long Distance High1.1949
Triple Number Windward/Leeward Low0.6611
Triple Number Windward/Leeward Medium0.8904
Triple Number Windward/Leeward High1.0125
Coastal/Long Distance0.9893
Predominantly Upwind0.9859
Predominantly Downwind1.0736
For information
General Purpose Handicap (GPH)625.1
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0727
Distanseseilas Trippeltall svak vind0.8491
Distanseseilas Trippeltall mellomvind1.0793
Distanseseilas Trippeltall sterk vind1.1949
Pølsebane Trippeltall svak vind0.6611
Pølsebane Trippeltall mellomvind0.8904
Pølsebane Trippeltall sterk vind1.0125
Motvind Singeltall0.9859
Medvind Singeltall1.0736
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Coastal/Long Distance606.50.9893
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind608.60.9859
Predominantly Downwind558.91.0736
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore557.91.0755
Cape Doctor Coastal472.71.2692
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8491
Triple Number Coastal/Long Distance Medium1.0793
Triple Number Coastal/Long Distance High1.1949
Triple Number Windward/Leeward Low0.6611
Triple Number Windward/Leeward Medium0.8904
Triple Number Windward/Leeward High1.0125
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8491
Triple Number Coastal/Long Distance Medium1.0793
Triple Number Coastal/Long Distance High1.1949
Triple Number Windward/Leeward Low0.6611
Triple Number Windward/Leeward Medium0.8904
Triple Number Windward/Leeward High1.0125
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Predominantly Upwind608.60.9859
Predominantly Downwind558.91.0736
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance606.50.9893
Triple Number Coastal/Long Distance Low706.60.8491
Triple Number Coastal/Long Distance Medium555.91.0793
Triple Number Coastal/Long Distance High502.11.1949
Triple Number Windward/Leeward Low907.60.6611
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1477.4997.0763.2642.1575.6539.8511.6466.9449.3
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low706.70.8491
Triple Number AP Medium556.01.0791
Triple Number AP High502.11.1949
Triple Number Windward/Leeward Low946.70.6338
Triple Number Windward/Leeward Medium673.90.8904
Triple Number Windward/Leeward High592.61.0125
Single Number Predominant Upwind632.70.9483
Single Number Predominant Reaching555.81.0796
Single Number Predominant Downwind581.41.0321
Predominant Upwind - Low863.60.6947
Predominant Upwind - Low/Med664.70.9027
Predominant Upwind - Medium590.31.0164
Predominant Upwind - Med/High553.61.0839
Predominant Upwind - High536.71.1179
Predominant Downwind Low832.50.7207
Predominant Downwind Low/Med625.50.9593
Predominant Downwind Medium541.21.1086
Predominant Downwind Med/High487.81.2300
Predominant Downwind High451.81.3280
Predominant Reaching Low753.30.7965
Predominant Reaching Low/Med585.31.0251
Predominant Reaching Medium523.31.1467
Predominant Reaching Med/High484.61.2383
Predominant Reaching High458.11.3099
SA/DSPL Upwind22.24SA/DSPL Downwind49.18
Scoring OptionTODTOT
5-Band Windward/Leeward Low1055.60.5684
5-Band Windward/Leeward Low/Med778.90.7703
5-Band Windward/Leeward Medium662.50.9056
5-Band Windward/Leeward Med/High600.70.9989
5-Band Windward/Leeward High572.41.0482
Windward/Leeward 60-40 Low1068.60.5615
Windward/Leeward 60-40 Low/Med793.00.7566
Windward/Leeward 60-40 Medium679.20.8833
Windward/Leeward 60-40 Med/High621.40.9656
Windward/Leeward 60-40 High597.01.0050
5-Band AP Low772.10.7771
5-Band AP Low/Med622.40.9640
5-Band AP Medium549.01.0930
5-Band AP Med/High508.31.1803
5-Band AP High485.71.2353
5-Band SF Bay Tour - Low915.00.6558
5-Band SF Bay Tour - Low/Med748.10.8020
5-Band SF Bay Tour - Medium643.40.9325
5-Band SF Bay Tour - Med/High588.51.0196
5-Band SF Bay Tour - High561.61.0684
Chicago-Mac Upwind0.9203
Chicago-Mac All Purpose0.9601
Chicago-Mac Downwind0.9974
Bayview-Mac Cove Island0.7109
Bayview-Mac Shore0.7150
Harvest Moon Regatta490.41.2235
Club Certificate2025
somleNOR 7111
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassOMEGA 36MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA11.000Max. Beam3.386Draft1.696Displacement5,357Wetted area25.05IMS L9.521LSM09.364Acc. length11.000Sink (kg/mm) 18.49
VCGD-0.100VCGM-0.031RM Rated (kg·m) 126.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight627Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0013
PSD0.030PHD0.070PHL0.140
PSA15.0°ESL0.160
ST10.000ST20.000ST30.000
ST40.000ST50.000
RIG
Forestay tensionAftInner stayNone FittedMast materialSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P14.100IG13.140ISP15.792MDT10.120MDL10.180MDT20.120MDL20.120TL0.000MW0.180GO0.210
E4.700J4.420BAS1.570FSDFoilSFJ0.000SPL4.508WPLTPS0.000BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.100Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
somleNOR 7111
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment626-2019032810160.141.051.903.114.0340.4528/03/2019
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment626-2019032810240.030.591.102.183.254.2912.90NoNo 28.0328/03/2019
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment626-20221110142015.2415.2415.248.728.80110.9510/11/2022267-20130522000012.9212.9212.928.580.0091.3822/05/2013267-201304282130 har feil reg. meter i SHW = notert i seilet 8,58
CRUISER/RACER REQUIREMENTS*
Accommodation length11.0 mTable area0.55 m²Headroom1.76 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity125 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity70 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.