Non Spin/HSFClub Certificate2025
Sea BerylNED 6066
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 Angles43.5°43.5°41.5°40.3°39.9°39.5°39.2°38.9°39.3°
Beat VMG2.393.283.974.464.754.915.005.095.11
52°3.755.025.906.516.847.027.127.217.25
60°3.985.286.156.727.037.217.317.427.47
75°4.115.446.336.887.207.407.547.727.82
90°3.995.336.266.887.247.487.667.938.12
110°3.464.765.796.617.127.457.708.118.43
120°3.244.515.566.406.997.367.638.098.49
135°2.773.985.045.896.597.087.417.908.36
150°2.283.384.415.276.016.647.087.658.10
Run VMG1.982.923.824.615.325.986.567.327.80
Gybe Angles146.5°146.5°151.2°157.9°167.6°172.3°177.2°179.5°179.5°
APH ToD:606.7CDL: 8.911APH ToT: 0.9890CertNo:13692
BOAT
ClassStandfast 40sDesignerF. MaasBuilderF. MaasAge date01/1976Series date01/1976Offset fileH198.offData fileNED6066
HULL
Length Overall12.203 mMaximum Beam3.984 mDraft2.115 mDisplacement10,933 kgDLR11.2071IMS DivisionCruiser/RacerDynamic Allowance0.670%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.400m
CREW
Maximum weight680 kg(default)Minimum weight550 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail40.1941.24Headsail Luffed47.0847.08Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail11.64Storm Jib11.60Heavy Weather Jib31.32
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
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.
Non Spin/HSFClub Certificate2025
Sea BerylNED 6066
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 VMG1503.41096.3907.1807.9757.2733.6719.3707.0705.2
52°958.9717.2609.7553.1525.9512.7505.8499.1496.3
60°903.5681.3585.0535.8512.1499.4492.2485.3481.7
75°875.8661.3569.1523.0500.0486.4477.2466.6460.6
90°901.9675.2575.0523.4497.3481.3469.7453.7443.1
110°1040.8756.5621.4544.7505.5483.4467.6443.9427.0
120°1110.2797.8647.7562.5515.1489.4471.9444.8424.0
135°1301.0905.7714.5611.7546.1508.6486.1455.4430.8
150°1575.71066.3817.2682.9599.2542.4508.1470.6444.3
Run VMG1817.21231.3942.8780.9676.3602.5549.0491.5461.3
Selected Courses
Windward / Leeward1656.71163.8924.9794.4716.8668.1634.2599.3583.3
All purpose1238.1888.5722.2632.5581.7551.7532.2510.0496.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward751.60.7983
All purpose606.70.9890
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7332
Downwind "popa"0.7963
70% up, 30% down "Ilhabela"0.7510
30% up, 70% down "Ilhabela-inverso"0.7763
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Predominantly Upwind644.10.9315
Predominantly Downwind634.40.9458
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low805.30.7450
Triple Number AP Medium602.90.9952
Triple Number AP High528.71.1348
Triple Number Windward/Leeward Low1092.90.5490
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Single Number Predominant Upwind669.50.8962
Single Number Predominant Reaching606.50.9892
Single Number Predominant Downwind667.30.8992
Predominant Upwind - Low939.20.6388
Predominant Upwind - Low/Med712.70.8419
Predominant Upwind - Medium620.60.9668
Predominant Upwind - Med/High573.21.0468
Predominant Upwind - High554.91.0813
Predominant Downwind Low1023.70.5861
Predominant Downwind Low/Med735.70.8156
Predominant Downwind Medium607.90.9870
Predominant Downwind Med/High529.81.1325
Predominant Downwind High493.91.2149
Predominant Reaching Low868.10.6912
Predominant Reaching Low/Med651.80.9206
Predominant Reaching Medium561.11.0694
Predominant Reaching Med/High510.11.1762
Predominant Reaching High486.91.2322
SA/DSPL Upwind17.58SA/DSPL Downwind17.58
Scoring OptionTODTOT
5-Band Windward/Leeward Low1228.20.4885
5-Band Windward/Leeward Low/Med883.40.6792
5-Band Windward/Leeward Medium732.00.8197
5-Band Windward/Leeward Med/High641.00.9360
5-Band Windward/Leeward High602.60.9958
Windward/Leeward 60-40 Low1212.70.4948
Windward/Leeward 60-40 Low/Med882.30.6801
Windward/Leeward 60-40 Medium739.80.8110
Windward/Leeward 60-40 Med/High657.40.9127
Windward/Leeward 60-40 High623.80.9618
5-Band AP Low903.80.6638
5-Band AP Low/Med694.30.8642
5-Band AP Medium592.71.0123
5-Band AP Med/High535.91.1196
5-Band AP High511.61.1729
5-Band SF Bay Tour - Low1048.80.5721
5-Band SF Bay Tour - Low/Med841.50.7130
5-Band SF Bay Tour - Medium704.90.8512
5-Band SF Bay Tour - Med/High626.50.9578
5-Band SF Bay Tour - High594.11.0099
Chicago-Mac Upwind0.8660
Chicago-Mac All Purpose0.8688
Chicago-Mac Downwind0.8616
Bayview-Mac Cove Island0.6206
Bayview-Mac Shore0.6279
Harvest Moon Regatta525.61.1415
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance663.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9043
Triple Number Coastal/Long Distance Low0.7450
Triple Number Coastal/Long Distance Medium0.9953
Triple Number Coastal/Long Distance High1.1348
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.8023
Triple Number Windward/Leeward High0.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
For information
General Purpose Handicap (GPH)686.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low805.4
Triple Number Coastal/Long Distance Medium602.8
Triple Number Coastal/Long Distance High528.7
Triple Number Windward/Leeward Low1044.4
Triple Number Windward/Leeward Medium747.8
Triple Number Windward/Leeward High629.6
Predominantly Upwind644.1
Predominantly Downwind634.4
Predominantly Reaching598.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7450
Triple Number Coastal/Long Distance Medium0.9953
Triple Number Coastal/Long Distance High1.1348
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.8023
Triple Number Windward/Leeward High0.9530
Coastal/Long Distance0.9043
Predominantly Upwind0.9315
Predominantly Downwind0.9458
For information
General Purpose Handicap (GPH)686.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9890
Distanseseilas Trippeltall svak vind0.7450
Distanseseilas Trippeltall mellomvind0.9953
Distanseseilas Trippeltall sterk vind1.1348
Pølsebane Trippeltall svak vind0.5745
Pølsebane Trippeltall mellomvind0.8023
Pølsebane Trippeltall sterk vind0.9530
Motvind Singeltall0.9315
Medvind Singeltall0.9458
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Coastal/Long Distance663.50.9043
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind644.10.9315
Predominantly Downwind634.40.9458
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore588.11.0203
Cape Doctor Coastal500.81.1981
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7450
Triple Number Coastal/Long Distance Medium0.9953
Triple Number Coastal/Long Distance High1.1348
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.8023
Triple Number Windward/Leeward High0.9530
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7450
Triple Number Coastal/Long Distance Medium0.9953
Triple Number Coastal/Long Distance High1.1348
Triple Number Windward/Leeward Low0.5745
Triple Number Windward/Leeward Medium0.8023
Triple Number Windward/Leeward High0.9530
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Predominantly Upwind644.10.9315
Predominantly Downwind634.40.9458
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance663.50.9043
Triple Number Coastal/Long Distance Low805.40.7450
Triple Number Coastal/Long Distance Medium602.80.9953
Triple Number Coastal/Long Distance High528.71.1348
Triple Number Windward/Leeward Low1044.40.5745
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1788.01170.5871.2714.9622.3573.3538.3490.2476.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low805.30.7450
Triple Number AP Medium602.90.9952
Triple Number AP High528.71.1348
Triple Number Windward/Leeward Low1092.90.5490
Triple Number Windward/Leeward Medium747.80.8023
Triple Number Windward/Leeward High629.60.9530
Single Number Predominant Upwind669.50.8962
Single Number Predominant Reaching606.50.9892
Single Number Predominant Downwind667.30.8992
Predominant Upwind - Low939.20.6388
Predominant Upwind - Low/Med712.70.8419
Predominant Upwind - Medium620.60.9668
Predominant Upwind - Med/High573.21.0468
Predominant Upwind - High554.91.0813
Predominant Downwind Low1023.70.5861
Predominant Downwind Low/Med735.70.8156
Predominant Downwind Medium607.90.9870
Predominant Downwind Med/High529.81.1325
Predominant Downwind High493.91.2149
Predominant Reaching Low868.10.6912
Predominant Reaching Low/Med651.80.9206
Predominant Reaching Medium561.11.0694
Predominant Reaching Med/High510.11.1762
Predominant Reaching High486.91.2322
SA/DSPL Upwind17.58SA/DSPL Downwind17.58
Scoring OptionTODTOT
5-Band Windward/Leeward Low1228.20.4885
5-Band Windward/Leeward Low/Med883.40.6792
5-Band Windward/Leeward Medium732.00.8197
5-Band Windward/Leeward Med/High641.00.9360
5-Band Windward/Leeward High602.60.9958
Windward/Leeward 60-40 Low1212.70.4948
Windward/Leeward 60-40 Low/Med882.30.6801
Windward/Leeward 60-40 Medium739.80.8110
Windward/Leeward 60-40 Med/High657.40.9127
Windward/Leeward 60-40 High623.80.9618
5-Band AP Low903.80.6638
5-Band AP Low/Med694.30.8642
5-Band AP Medium592.71.0123
5-Band AP Med/High535.91.1196
5-Band AP High511.61.1729
5-Band SF Bay Tour - Low1048.80.5721
5-Band SF Bay Tour - Low/Med841.50.7130
5-Band SF Bay Tour - Medium704.90.8512
5-Band SF Bay Tour - Med/High626.50.9578
5-Band SF Bay Tour - High594.11.0099
Chicago-Mac Upwind0.8660
Chicago-Mac All Purpose0.8688
Chicago-Mac Downwind0.8616
Bayview-Mac Cove Island0.6206
Bayview-Mac Shore0.6279
Harvest Moon Regatta525.61.1415
Non Spin/HSFClub Certificate2025
Sea BerylNED 6066
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassStandfast 40sMeasurement05/10/1998HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA12.203Max. Beam3.984Draft2.115Displacement10,933Wetted area33.08IMS L10.044LSM09.917Acc. length12.203Sink (kg/mm) 22.40
VCGD-0.011VCGM0.018RM Rated (kg·m) 170.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight680Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.400PBWPIPA0.0006
EDLST1ST2
ST3ST4ST5
RIG
Forestay tensionAftInner stayAdjustableMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders1Rotating mastNo
P13.300IG15.230ISP15.230MDT10.170MDL10.225MDT2MDL2TLTaperMWGO
E5.000J5.180BAS1.740FSDFoilSFJ0.000SPL5.284WPLTPSBDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date05/10/1998
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
Sea BerylNED 6066
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.150.001.903.250.0040.19* Copied from legacy *
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment010.080.771.513.094.776.5014.85NoNo 47.08ORC5.000.00NoNo 40.94* Copied from legacy *
CRUISER/RACER REQUIREMENTS*
Accommodation length12.2 mTable area0.55 m²Headroom1.82 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity155 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity94 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.