Club Certificate2025
NajadenNOR 11460
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 Angles42.9°42.9°40.1°39.1°38.9°38.7°38.5°38.4°39.4°
Beat VMG2.313.193.854.244.424.534.604.684.66
52°3.614.825.656.126.346.446.516.596.62
60°3.825.065.876.316.526.636.706.786.82
75°3.905.196.036.476.716.866.947.067.12
90°3.925.256.146.576.776.977.127.327.45
110°3.855.246.226.717.007.217.367.597.68
120°3.655.036.066.646.987.267.507.898.17
135°3.204.485.546.326.777.107.408.048.77
150°2.623.804.865.756.416.817.117.728.48
Run VMG2.273.294.215.015.716.266.677.257.83
Gybe Angles145.8°145.8°151.0°154.3°161.5°169.1°178.1°178.6°178.1°
APH ToD:617.3CDL: 7.608APH ToT: 0.9720CertNo:8917
BOAT
ClassRhapsody 34DesignerGöranDahlströmBuilderDahlstrøm båtAge date01/1976Series date01/1976Offset fileraps34CL.offData file8917
HULL
Length Overall10.500 mMaximum Beam2.704 mDraft1.790 mDisplacement4,693 kgDLR8.1815IMS DivisionCruiser/RacerDynamic Allowance0.370%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFeathering 2 bladesDiameter0.380m
CREW
Maximum weight528 kg(default)Minimum weight398 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail32.3532.89Headsail Luffed20.0720.07Headsail FlyingSymmetric60.2960.29Asymmetric
STORM SAIL AREAS (m²)
Trysail9.61Storm Jib6.17Heavy Weather Jib16.64
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
NajadenNOR 11460
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 VMG1557.41130.1934.8848.8813.8794.4782.0769.2773.3
52°997.7746.6637.5588.1568.2558.9552.8545.9543.7
60°942.9711.4613.4570.2551.8543.2537.6530.9528.2
75°922.4693.6596.7556.2536.4525.1518.5510.0505.5
90°918.9686.1586.4547.8531.8516.5505.5492.0483.3
110°935.0687.3578.5536.5514.2499.1489.0474.0468.5
120°985.3716.2594.3542.4515.8496.1479.7456.5440.8
135°1125.5804.0650.2569.4531.6507.3486.5448.0410.4
150°1371.5948.2740.8626.1561.8528.8506.1466.6424.8
Run VMG1585.01094.9854.8719.3630.9575.2539.7496.3459.8
Selected Courses
Windward / Leeward1569.81112.5894.8784.0722.4684.8660.8632.7616.6
All purpose1185.1857.3705.8633.6596.9575.0560.3540.0526.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward753.30.7965
All purpose617.30.9720
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6916
Downwind "popa"0.8552
70% up, 30% down "Ilhabela"0.7337
30% up, 70% down "Ilhabela-inverso"0.7985
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Predominantly Upwind669.30.8964
Predominantly Downwind621.50.9653
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low781.60.7677
Triple Number AP Medium612.80.9791
Triple Number AP High556.41.0784
Triple Number Windward/Leeward Low1049.30.5718
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Single Number Predominant Upwind695.30.8629
Single Number Predominant Reaching614.30.9768
Single Number Predominant Downwind649.90.9233
Predominant Upwind - Low939.70.6385
Predominant Upwind - Low/Med726.30.8261
Predominant Upwind - Medium650.20.9229
Predominant Upwind - Med/High612.80.9791
Predominant Upwind - High596.01.0067
Predominant Downwind Low947.00.6336
Predominant Downwind Low/Med701.10.8558
Predominant Downwind Medium599.91.0001
Predominant Downwind Med/High540.21.1107
Predominant Downwind High507.41.1825
Predominant Reaching Low838.70.7154
Predominant Reaching Low/Med646.30.9283
Predominant Reaching Medium575.21.0431
Predominant Reaching Med/High535.41.1207
Predominant Reaching High512.71.1702
SA/DSPL Upwind18.61SA/DSPL Downwind32.88
Scoring OptionTODTOT
5-Band Windward/Leeward Low1172.80.5116
5-Band Windward/Leeward Low/Med862.40.6958
5-Band Windward/Leeward Medium735.50.8157
5-Band Windward/Leeward Med/High665.30.9018
5-Band Windward/Leeward High634.80.9452
Windward/Leeward 60-40 Low1175.80.5103
Windward/Leeward 60-40 Low/Med873.00.6873
Windward/Leeward 60-40 Medium753.20.7966
Windward/Leeward 60-40 Med/High689.20.8706
Windward/Leeward 60-40 High662.30.9060
5-Band AP Low864.20.6943
5-Band AP Low/Med686.60.8739
5-Band AP Medium605.30.9912
5-Band AP Med/High562.41.0668
5-Band AP High541.21.1087
5-Band SF Bay Tour - Low1010.00.5941
5-Band SF Bay Tour - Low/Med826.10.7263
5-Band SF Bay Tour - Medium713.60.8407
5-Band SF Bay Tour - Med/High653.60.9180
5-Band SF Bay Tour - High625.90.9586
Chicago-Mac Upwind0.8389
Chicago-Mac All Purpose0.8677
Chicago-Mac Downwind0.8915
Bayview-Mac Cove Island0.6393
Bayview-Mac Shore0.6443
Harvest Moon Regatta539.51.1122
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance670.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating670.20.8952
FinRating, kevyt tuuli1152.30.8678
FinRating, kova tuuli544.70.9180
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8952
Triple Number Coastal/Long Distance Low0.7677
Triple Number Coastal/Long Distance Medium0.9792
Triple Number Coastal/Long Distance High1.0784
Triple Number Windward/Leeward Low0.5978
Triple Number Windward/Leeward Medium0.8022
Triple Number Windward/Leeward High0.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
For information
General Purpose Handicap (GPH)690.3
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low781.6
Triple Number Coastal/Long Distance Medium612.7
Triple Number Coastal/Long Distance High556.4
Triple Number Windward/Leeward Low1003.7
Triple Number Windward/Leeward Medium747.9
Triple Number Windward/Leeward High656.3
Predominantly Upwind669.3
Predominantly Downwind621.5
Predominantly Reaching599.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7677
Triple Number Coastal/Long Distance Medium0.9792
Triple Number Coastal/Long Distance High1.0784
Triple Number Windward/Leeward Low0.5978
Triple Number Windward/Leeward Medium0.8022
Triple Number Windward/Leeward High0.9142
Coastal/Long Distance0.8952
Predominantly Upwind0.8964
Predominantly Downwind0.9653
For information
General Purpose Handicap (GPH)690.3
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9720
Distanseseilas Trippeltall svak vind0.7677
Distanseseilas Trippeltall mellomvind0.9792
Distanseseilas Trippeltall sterk vind1.0784
Pølsebane Trippeltall svak vind0.5978
Pølsebane Trippeltall mellomvind0.8022
Pølsebane Trippeltall sterk vind0.9142
Motvind Singeltall0.8964
Medvind Singeltall0.9653
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Coastal/Long Distance670.20.8952
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind669.30.8964
Predominantly Downwind621.50.9653
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore621.40.9655
Cape Doctor Coastal530.51.1310
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7677
Triple Number Coastal/Long Distance Medium0.9792
Triple Number Coastal/Long Distance High1.0784
Triple Number Windward/Leeward Low0.5978
Triple Number Windward/Leeward Medium0.8022
Triple Number Windward/Leeward High0.9142
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7677
Triple Number Coastal/Long Distance Medium0.9792
Triple Number Coastal/Long Distance High1.0784
Triple Number Windward/Leeward Low0.5978
Triple Number Windward/Leeward Medium0.8022
Triple Number Windward/Leeward High0.9142
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Predominantly Upwind669.30.8964
Predominantly Downwind621.50.9653
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance670.20.8952
Triple Number Coastal/Long Distance Low781.60.7677
Triple Number Coastal/Long Distance Medium612.70.9792
Triple Number Coastal/Long Distance High556.41.0784
Triple Number Windward/Leeward Low1003.70.5978
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1666.91110.8842.6709.8636.4596.3565.6518.5504.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low781.60.7677
Triple Number AP Medium612.80.9791
Triple Number AP High556.41.0784
Triple Number Windward/Leeward Low1049.30.5718
Triple Number Windward/Leeward Medium747.90.8022
Triple Number Windward/Leeward High656.30.9142
Single Number Predominant Upwind695.30.8629
Single Number Predominant Reaching614.30.9768
Single Number Predominant Downwind649.90.9233
Predominant Upwind - Low939.70.6385
Predominant Upwind - Low/Med726.30.8261
Predominant Upwind - Medium650.20.9229
Predominant Upwind - Med/High612.80.9791
Predominant Upwind - High596.01.0067
Predominant Downwind Low947.00.6336
Predominant Downwind Low/Med701.10.8558
Predominant Downwind Medium599.91.0001
Predominant Downwind Med/High540.21.1107
Predominant Downwind High507.41.1825
Predominant Reaching Low838.70.7154
Predominant Reaching Low/Med646.30.9283
Predominant Reaching Medium575.21.0431
Predominant Reaching Med/High535.41.1207
Predominant Reaching High512.71.1702
SA/DSPL Upwind18.61SA/DSPL Downwind32.88
Scoring OptionTODTOT
5-Band Windward/Leeward Low1172.80.5116
5-Band Windward/Leeward Low/Med862.40.6958
5-Band Windward/Leeward Medium735.50.8157
5-Band Windward/Leeward Med/High665.30.9018
5-Band Windward/Leeward High634.80.9452
Windward/Leeward 60-40 Low1175.80.5103
Windward/Leeward 60-40 Low/Med873.00.6873
Windward/Leeward 60-40 Medium753.20.7966
Windward/Leeward 60-40 Med/High689.20.8706
Windward/Leeward 60-40 High662.30.9060
5-Band AP Low864.20.6943
5-Band AP Low/Med686.60.8739
5-Band AP Medium605.30.9912
5-Band AP Med/High562.41.0668
5-Band AP High541.21.1087
5-Band SF Bay Tour - Low1010.00.5941
5-Band SF Bay Tour - Low/Med826.10.7263
5-Band SF Bay Tour - Medium713.60.8407
5-Band SF Bay Tour - Med/High653.60.9180
5-Band SF Bay Tour - High625.90.9586
Chicago-Mac Upwind0.8389
Chicago-Mac All Purpose0.8677
Chicago-Mac Downwind0.8915
Bayview-Mac Cove Island0.6393
Bayview-Mac Shore0.6443
Harvest Moon Regatta539.51.1122
Club Certificate2025
NajadenNOR 11460
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassRhapsody 34MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.500Max. Beam2.704Draft1.790Displacement4,693Wetted area20.75IMS L8.482LSM08.308Acc. length8.788Sink (kg/mm) 12.78
VCGD-0.020VCGM-0.158RM Rated (kg·m) 50.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight528Declared crew weightN/A
PROPELLER
Propeller TypeFeathering 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0030
EDL1.000ST10.048ST20.170
ST30.170ST40.098ST50.250
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P13.000IG11.100ISP11.940MDT10.120MDL10.170MDT20.120MDL20.170TL0.000MW0.000GO0.000
E4.220J3.300BAS1.110FSDFoilSFJ0.000SPL3.350WPLTPS0.000BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.020Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
NajadenNOR 11460
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment454-2016081819100.150.831.592.703.5032.3518/08/2016
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment454-2018090518100.060.530.991.862.703.5210.98YesNo 20.0705/09/2018999-2006012118260.000.000.000.000.003.3110.15NoNo 17.1021/01/2006Hamel seil
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment401-20060919154211.2811.2811.286.510.0060.2919/09/2006Hamel sails
CRUISER/RACER REQUIREMENTS*
Accommodation length8.8 mTable area0.33 m²Headroom1.59 mMinimum number of berths3Personal gear stowage0.12 m³Fresh water capacity42 lMinimum number of seats in cockpit3Food stowage0.18 m³Fuel capacity26 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.