Club Certificate2025
CHESSESP-7017_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
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 Angles44.2°44.2°41.9°40.6°39.1°38.5°38.6°39.1°40.7°
Beat VMG2.293.163.834.314.614.754.824.824.72
52°3.604.855.736.266.536.696.766.816.80
60°3.845.125.976.436.696.856.947.027.04
75°4.015.316.136.566.837.037.187.377.46
90°3.925.226.106.646.947.137.297.627.87
110°3.785.176.186.727.067.367.648.098.41
120°3.614.986.036.647.017.337.648.349.02
135°3.174.455.536.326.797.137.468.219.32
150°2.623.804.875.766.426.837.167.828.69
Run VMG2.263.294.225.025.716.266.677.307.92
Gybe Angles146.6°146.6°151.0°154.6°161.2°168.2°177.2°178.1°177.2°
APH ToD:607.2CDL: 7.817APH ToT: 0.9882CertNo:701701
BOAT
ClassDEHLER 34DesignerV. DE STADTBuilderDEHLERAge date12/1990Series date01/1981Offset fileG1102.BOFData fileE7017_C
HULL
Length Overall10.112 mMaximum Beam3.414 mDraft1.754 mDisplacement4,306 kgDLR7.9686IMS DivisionCruiser/RacerDynamic Allowance0.280%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.440m
CREW
Maximum weight300 kg(declared)Minimum weight170 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail29.0629.53Headsail Luffed30.5130.51Headsail FlyingSymmetric62.6262.62Asymmetric
STORM SAIL AREAS (m²)
Trysail8.72Storm Jib6.79Heavy Weather Jib18.31
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
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
CHESSESP-7017_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
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 VMG1571.71140.1938.9835.2780.7757.8747.7746.5763.0
52°1000.0742.4628.3575.3551.0538.4532.5528.4529.7
60°936.8703.0603.0559.9538.5525.8518.5512.7511.6
75°896.9678.3587.1548.4527.2512.4501.4488.6482.7
90°919.3690.0590.4542.4519.0504.9493.9472.2457.5
110°953.4696.7582.3535.7509.6489.0471.2445.3428.3
120°998.3722.8597.2542.3513.6491.5471.5431.7399.0
135°1135.5808.2651.5569.9530.6504.7482.3438.3386.3
150°1376.2948.6739.1624.5560.9527.1503.0460.6414.2
Run VMG1589.91095.4852.9717.0630.4575.1539.4493.4454.7
Selected Courses
Windward / Leeward1579.11117.7895.9776.1705.6666.4643.5620.0608.9
All purpose1190.3859.7705.3627.4584.8560.7544.7523.0507.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward741.00.8097
All purpose607.20.9882
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7063
Downwind "popa"0.8565
70% up, 30% down "Ilhabela"0.7455
30% up, 70% down "Ilhabela-inverso"0.8051
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Predominantly Upwind655.80.9149
Predominantly Downwind616.60.9731
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low782.50.7668
Triple Number AP Medium603.10.9949
Triple Number AP High540.61.1099
Triple Number Windward/Leeward Low1052.20.5702
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Single Number Predominant Upwind682.70.8789
Single Number Predominant Reaching606.40.9895
Single Number Predominant Downwind644.60.9308
Predominant Upwind - Low942.50.6366
Predominant Upwind - Low/Med720.20.8331
Predominant Upwind - Medium634.10.9462
Predominant Upwind - Med/High593.21.0115
Predominant Upwind - High578.51.0372
Predominant Downwind Low949.80.6317
Predominant Downwind Low/Med699.00.8584
Predominant Downwind Medium593.81.0105
Predominant Downwind Med/High531.71.1285
Predominant Downwind High496.11.2096
Predominant Reaching Low841.30.7131
Predominant Reaching Low/Med643.30.9327
Predominant Reaching Medium565.91.0602
Predominant Reaching Med/High522.91.1474
Predominant Reaching High497.01.2071
SA/DSPL Upwind22.40SA/DSPL Downwind34.47
Scoring OptionTODTOT
5-Band Windward/Leeward Low1178.00.5093
5-Band Windward/Leeward Low/Med858.20.6991
5-Band Windward/Leeward Medium721.50.8316
5-Band Windward/Leeward Med/High648.60.9250
5-Band Windward/Leeward High622.10.9644
Windward/Leeward 60-40 Low1182.00.5076
Windward/Leeward 60-40 Low/Med868.30.6910
Windward/Leeward 60-40 Medium736.50.8147
Windward/Leeward 60-40 Med/High669.30.8965
Windward/Leeward 60-40 High647.60.9265
5-Band AP Low865.00.6936
5-Band AP Low/Med682.80.8788
5-Band AP Medium594.51.0092
5-Band AP Med/High547.11.0967
5-Band AP High524.21.1447
5-Band SF Bay Tour - Low1014.70.5913
5-Band SF Bay Tour - Low/Med822.20.7297
5-Band SF Bay Tour - Medium699.30.8580
5-Band SF Bay Tour - Med/High635.80.9436
5-Band SF Bay Tour - High611.30.9816
Chicago-Mac Upwind0.8517
Chicago-Mac All Purpose0.8773
Chicago-Mac Downwind0.8973
Bayview-Mac Cove Island0.6403
Bayview-Mac Shore0.6452
Harvest Moon Regatta530.61.1307
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance659.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating659.90.9093
FinRating, kevyt tuuli1157.20.8642
FinRating, kova tuuli527.20.9485
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9093
Triple Number Coastal/Long Distance Low0.7668
Triple Number Coastal/Long Distance Medium0.9950
Triple Number Coastal/Long Distance High1.1099
Triple Number Windward/Leeward Low0.5959
Triple Number Windward/Leeward Medium0.8162
Triple Number Windward/Leeward High0.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
For information
General Purpose Handicap (GPH)682.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low782.5
Triple Number Coastal/Long Distance Medium603.0
Triple Number Coastal/Long Distance High540.6
Triple Number Windward/Leeward Low1006.9
Triple Number Windward/Leeward Medium735.1
Triple Number Windward/Leeward High640.4
Predominantly Upwind655.8
Predominantly Downwind616.6
Predominantly Reaching593.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7668
Triple Number Coastal/Long Distance Medium0.9950
Triple Number Coastal/Long Distance High1.1099
Triple Number Windward/Leeward Low0.5959
Triple Number Windward/Leeward Medium0.8162
Triple Number Windward/Leeward High0.9369
Coastal/Long Distance0.9093
Predominantly Upwind0.9149
Predominantly Downwind0.9731
For information
General Purpose Handicap (GPH)682.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9882
Distanseseilas Trippeltall svak vind0.7668
Distanseseilas Trippeltall mellomvind0.9950
Distanseseilas Trippeltall sterk vind1.1099
Pølsebane Trippeltall svak vind0.5959
Pølsebane Trippeltall mellomvind0.8162
Pølsebane Trippeltall sterk vind0.9369
Motvind Singeltall0.9149
Medvind Singeltall0.9731
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Coastal/Long Distance659.90.9093
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind655.80.9149
Predominantly Downwind616.60.9731
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore612.20.9801
Cape Doctor Coastal512.41.1709
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7668
Triple Number Coastal/Long Distance Medium0.9950
Triple Number Coastal/Long Distance High1.1099
Triple Number Windward/Leeward Low0.5959
Triple Number Windward/Leeward Medium0.8162
Triple Number Windward/Leeward High0.9369
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7668
Triple Number Coastal/Long Distance Medium0.9950
Triple Number Coastal/Long Distance High1.1099
Triple Number Windward/Leeward Low0.5959
Triple Number Windward/Leeward Medium0.8162
Triple Number Windward/Leeward High0.9369
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Predominantly Upwind655.80.9149
Predominantly Downwind616.60.9731
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance659.90.9093
Triple Number Coastal/Long Distance Low782.50.7668
Triple Number Coastal/Long Distance Medium603.00.9950
Triple Number Coastal/Long Distance High540.61.1099
Triple Number Windward/Leeward Low1006.90.5959
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1676.71115.5843.2702.8622.6581.5551.0500.6482.3
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low782.50.7668
Triple Number AP Medium603.10.9949
Triple Number AP High540.61.1099
Triple Number Windward/Leeward Low1052.20.5702
Triple Number Windward/Leeward Medium735.10.8162
Triple Number Windward/Leeward High640.40.9369
Single Number Predominant Upwind682.70.8789
Single Number Predominant Reaching606.40.9895
Single Number Predominant Downwind644.60.9308
Predominant Upwind - Low942.50.6366
Predominant Upwind - Low/Med720.20.8331
Predominant Upwind - Medium634.10.9462
Predominant Upwind - Med/High593.21.0115
Predominant Upwind - High578.51.0372
Predominant Downwind Low949.80.6317
Predominant Downwind Low/Med699.00.8584
Predominant Downwind Medium593.81.0105
Predominant Downwind Med/High531.71.1285
Predominant Downwind High496.11.2096
Predominant Reaching Low841.30.7131
Predominant Reaching Low/Med643.30.9327
Predominant Reaching Medium565.91.0602
Predominant Reaching Med/High522.91.1474
Predominant Reaching High497.01.2071
SA/DSPL Upwind22.40SA/DSPL Downwind34.47
Scoring OptionTODTOT
5-Band Windward/Leeward Low1178.00.5093
5-Band Windward/Leeward Low/Med858.20.6991
5-Band Windward/Leeward Medium721.50.8316
5-Band Windward/Leeward Med/High648.60.9250
5-Band Windward/Leeward High622.10.9644
Windward/Leeward 60-40 Low1182.00.5076
Windward/Leeward 60-40 Low/Med868.30.6910
Windward/Leeward 60-40 Medium736.50.8147
Windward/Leeward 60-40 Med/High669.30.8965
Windward/Leeward 60-40 High647.60.9265
5-Band AP Low865.00.6936
5-Band AP Low/Med682.80.8788
5-Band AP Medium594.51.0092
5-Band AP Med/High547.11.0967
5-Band AP High524.21.1447
5-Band SF Bay Tour - Low1014.70.5913
5-Band SF Bay Tour - Low/Med822.20.7297
5-Band SF Bay Tour - Medium699.30.8580
5-Band SF Bay Tour - Med/High635.80.9436
5-Band SF Bay Tour - High611.30.9816
Chicago-Mac Upwind0.8517
Chicago-Mac All Purpose0.8773
Chicago-Mac Downwind0.8973
Bayview-Mac Cove Island0.6403
Bayview-Mac Shore0.6452
Harvest Moon Regatta530.61.1307
Club Certificate2025
CHESSESP-7017_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDEHLER 34Measurement26/07/2000HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.112Max. Beam3.414Draft1.754Displacement4,306Wetted area21.07IMS L8.318LSM08.144Acc. length9.904Sink (kg/mm) 15.21
VCGD-0.253VCGM-0.259RM Rated (kg·m) 108.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight514Declared crew weight300
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.440PBW0.137PIPA0.0061
PSD0.025PHD0.079PHL0.132
PSA21.0°ESL0.940
ST10.030ST20.105ST30.105
ST40.052ST50.240
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P12.140IG11.645ISP12.440MDT10.122MDL10.168MDT20.122MDL20.168TLMW0.168GO0.168
E4.100J3.780BAS1.360FSD0.032SFJ0.000SPL3.409WPLTPSBD0.164MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered110.0Flotation Date01/01/2010
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
CHESSESP-7017_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.130.781.452.5329.0627/03/2011
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment011.192.545.3111.61NoNo 30.5127/03/2011
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment0112.3612.3612.366.106.0062.6227/03/2011
CRUISER/RACER REQUIREMENTS*
Accommodation length9.9 mTable area0.44 m²Headroom1.70 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity78 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity48 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.