Double HandedClub Certificate2025
ZeehondNED 8075
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°41.9°41.2°40.8°40.4°40.1°40.2°41.2°
Beat VMG2.653.664.454.975.265.415.485.535.45
52°4.175.636.677.367.727.887.968.048.03
60°4.455.956.987.637.978.158.238.328.33
75°4.666.187.207.838.198.418.568.728.81
90°4.776.387.488.078.388.568.739.079.29
110°4.636.267.428.118.558.899.159.629.94
120°4.365.977.208.008.488.879.259.8610.42
135°3.815.336.587.548.168.609.009.8110.74
150°3.124.475.666.677.508.078.479.179.90
Run VMG2.703.874.905.786.507.047.508.218.85
Gybe Angles142.3°142.3°146.9°149.2°150.7°154.0°159.5°164.8°178.0°
APH ToD:518.1CDL: 10.959APH ToT: 1.1581CertNo:26335
BOAT
ClassXC-45DesignerN. JeppesenBuilderX-YachtsAge date06/2009Series date01/2009Offset fileXC45.OFFData fileNED8075
HULL
Length Overall13.634 mMaximum Beam4.310 mDraft2.214 mDisplacement13,673 kgDLR7.2903IMS DivisionCruiser/RacerDynamic Allowance0.400%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 3 bladesDiameter0.435m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail60.9861.79Headsail Luffed55.4155.41Headsail FlyingSymmetricAsymmetric135.98135.98 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail18.73Storm Jib18.15Heavy Weather Jib49.00
SAIL LIMITS
Headsails6Spinnakers5
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
ZeehondNED 8075
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 VMG1357.5982.6808.8724.9684.1665.7656.5650.8660.1
52°862.5639.7539.6489.3466.5457.0452.0447.9448.5
60°808.4605.3516.1471.8451.6441.9437.3432.9432.2
75°772.6582.2500.1459.8439.6428.0420.4412.6408.8
90°755.3564.1481.4445.9429.6420.6412.4396.7387.6
110°777.8575.2485.1443.9421.2404.8393.5374.1362.1
120°826.5602.8499.9449.8424.4405.7389.3365.1345.4
135°944.1675.9547.3477.3441.0418.8400.1367.0335.1
150°1152.7806.2636.6539.5479.9446.1425.3392.8363.7
Run VMG1331.0931.0735.1623.0553.8511.3480.3438.4406.9
Selected Courses
Windward / Leeward1343.8956.8771.9674.0618.9588.5568.4544.6533.5
All purpose1007.2729.7600.3534.3499.2479.6466.1448.2437.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward647.30.9270
All purpose518.11.1581
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8118
Downwind "popa"0.9830
70% up, 30% down "Ilhabela"0.8566
30% up, 70% down "Ilhabela-inverso"0.9245
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Predominantly Upwind561.51.0685
Predominantly Downwind525.71.1413
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low665.00.9022
Triple Number AP Medium514.51.1662
Triple Number AP High462.81.2965
Triple Number Windward/Leeward Low902.60.6648
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Single Number Predominant Upwind584.61.0263
Single Number Predominant Reaching510.81.1746
Single Number Predominant Downwind549.11.0927
Predominant Upwind - Low803.90.7464
Predominant Upwind - Low/Med615.10.9755
Predominant Upwind - Medium543.51.1040
Predominant Upwind - Med/High510.01.1766
Predominant Upwind - High496.91.2074
Predominant Downwind Low801.00.7491
Predominant Downwind Low/Med593.81.0104
Predominant Downwind Medium506.91.1837
Predominant Downwind Med/High456.01.3158
Predominant Downwind High427.01.4051
Predominant Reaching Low705.60.8504
Predominant Reaching Low/Med540.51.1101
Predominant Reaching Medium476.71.2586
Predominant Reaching Med/High442.21.3567
Predominant Reaching High422.31.4209
SA/DSPL Upwind20.18SA/DSPL Downwind34.15
Scoring OptionTODTOT
5-Band Windward/Leeward Low1007.40.5956
5-Band Windward/Leeward Low/Med742.00.8086
5-Band Windward/Leeward Medium631.50.9501
5-Band Windward/Leeward Med/High572.01.0489
5-Band Windward/Leeward High546.81.0973
Windward/Leeward 60-40 Low1012.50.5926
Windward/Leeward 60-40 Low/Med750.90.7990
Windward/Leeward 60-40 Medium644.40.9311
Windward/Leeward 60-40 Med/High589.51.0178
Windward/Leeward 60-40 High568.11.0561
5-Band AP Low731.70.8200
5-Band AP Low/Med581.21.0324
5-Band AP Medium507.41.1825
5-Band AP Med/High468.21.2816
5-Band AP High449.51.3347
5-Band SF Bay Tour - Low868.50.6909
5-Band SF Bay Tour - Low/Med708.50.8468
5-Band SF Bay Tour - Medium607.90.9870
5-Band SF Bay Tour - Med/High555.21.0806
5-Band SF Bay Tour - High532.91.1258
Chicago-Mac Upwind0.9951
Chicago-Mac All Purpose1.0284
Chicago-Mac Downwind1.0537
Bayview-Mac Cove Island0.7514
Bayview-Mac Shore0.7575
Harvest Moon Regatta446.91.3427
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance566.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0602
Triple Number Coastal/Long Distance Low0.9022
Triple Number Coastal/Long Distance Medium1.1664
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6942
Triple Number Windward/Leeward Medium0.9340
Triple Number Windward/Leeward High1.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
For information
General Purpose Handicap (GPH)581.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low665.0
Triple Number Coastal/Long Distance Medium514.4
Triple Number Coastal/Long Distance High462.8
Triple Number Windward/Leeward Low864.3
Triple Number Windward/Leeward Medium642.4
Triple Number Windward/Leeward High564.5
Predominantly Upwind561.5
Predominantly Downwind525.7
Predominantly Reaching500.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9022
Triple Number Coastal/Long Distance Medium1.1664
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6942
Triple Number Windward/Leeward Medium0.9340
Triple Number Windward/Leeward High1.0629
Coastal/Long Distance1.0602
Predominantly Upwind1.0685
Predominantly Downwind1.1413
For information
General Purpose Handicap (GPH)581.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.1581
Distanseseilas Trippeltall svak vind0.9022
Distanseseilas Trippeltall mellomvind1.1664
Distanseseilas Trippeltall sterk vind1.2965
Pølsebane Trippeltall svak vind0.6942
Pølsebane Trippeltall mellomvind0.9340
Pølsebane Trippeltall sterk vind1.0629
Motvind Singeltall1.0685
Medvind Singeltall1.1413
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Coastal/Long Distance566.01.0602
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind561.51.0685
Predominantly Downwind525.71.1413
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore536.81.1177
Cape Doctor Coastal441.01.3606
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9022
Triple Number Coastal/Long Distance Medium1.1664
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6942
Triple Number Windward/Leeward Medium0.9340
Triple Number Windward/Leeward High1.0629
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9022
Triple Number Coastal/Long Distance Medium1.1664
Triple Number Coastal/Long Distance High1.2965
Triple Number Windward/Leeward Low0.6942
Triple Number Windward/Leeward Medium0.9340
Triple Number Windward/Leeward High1.0629
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Predominantly Upwind561.51.0685
Predominantly Downwind525.71.1413
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance566.01.0602
Triple Number Coastal/Long Distance Low665.00.9022
Triple Number Coastal/Long Distance Medium514.41.1664
Triple Number Coastal/Long Distance High462.81.2965
Triple Number Windward/Leeward Low864.30.6942
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1427.5954.2724.3604.6534.6498.2470.3427.0415.0
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low665.00.9022
Triple Number AP Medium514.51.1662
Triple Number AP High462.81.2965
Triple Number Windward/Leeward Low902.60.6648
Triple Number Windward/Leeward Medium642.40.9340
Triple Number Windward/Leeward High564.51.0629
Single Number Predominant Upwind584.61.0263
Single Number Predominant Reaching510.81.1746
Single Number Predominant Downwind549.11.0927
Predominant Upwind - Low803.90.7464
Predominant Upwind - Low/Med615.10.9755
Predominant Upwind - Medium543.51.1040
Predominant Upwind - Med/High510.01.1766
Predominant Upwind - High496.91.2074
Predominant Downwind Low801.00.7491
Predominant Downwind Low/Med593.81.0104
Predominant Downwind Medium506.91.1837
Predominant Downwind Med/High456.01.3158
Predominant Downwind High427.01.4051
Predominant Reaching Low705.60.8504
Predominant Reaching Low/Med540.51.1101
Predominant Reaching Medium476.71.2586
Predominant Reaching Med/High442.21.3567
Predominant Reaching High422.31.4209
SA/DSPL Upwind20.18SA/DSPL Downwind34.15
Scoring OptionTODTOT
5-Band Windward/Leeward Low1007.40.5956
5-Band Windward/Leeward Low/Med742.00.8086
5-Band Windward/Leeward Medium631.50.9501
5-Band Windward/Leeward Med/High572.01.0489
5-Band Windward/Leeward High546.81.0973
Windward/Leeward 60-40 Low1012.50.5926
Windward/Leeward 60-40 Low/Med750.90.7990
Windward/Leeward 60-40 Medium644.40.9311
Windward/Leeward 60-40 Med/High589.51.0178
Windward/Leeward 60-40 High568.11.0561
5-Band AP Low731.70.8200
5-Band AP Low/Med581.21.0324
5-Band AP Medium507.41.1825
5-Band AP Med/High468.21.2816
5-Band AP High449.51.3347
5-Band SF Bay Tour - Low868.50.6909
5-Band SF Bay Tour - Low/Med708.50.8468
5-Band SF Bay Tour - Medium607.90.9870
5-Band SF Bay Tour - Med/High555.21.0806
5-Band SF Bay Tour - High532.91.1258
Chicago-Mac Upwind0.9951
Chicago-Mac All Purpose1.0284
Chicago-Mac Downwind1.0537
Bayview-Mac Cove Island0.7514
Bayview-Mac Shore0.7575
Harvest Moon Regatta446.91.3427
Double HandedClub Certificate2025
ZeehondNED 8075
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassXC-45Measurement03/07/2009HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA13.634Max. Beam4.310Draft2.214Displacement13,673Wetted area42.68IMS L12.387LSM012.331Acc. length13.634Sink (kg/mm) 32.12
VCGD0.045VCGM0.032RM Rated (kg·m) 344.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
PROPELLER
Propeller TypeFolding 3 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.435PBWPIPA0.0008
EDLST1ST2
ST3ST4ST5
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders3Rotating mastNo
P18.140IG19.050ISP20.130MDT10.130MDL10.270MDT2MDL2TLTaperMWGO
E5.900J5.070BAS2.030FSDSFJ0.030SPLWPLTPS5.620BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date03/07/2014
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
ZeehondNED 8075
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment010.161.122.013.604.7960.98
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment30.080.641.292.834.486.5018.50NoNo 55.4101/05/2020
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment220.3018.3519.337.9210.5475%135.9810/01/2018
CRUISER/RACER REQUIREMENTS*
Accommodation length13.6 mTable area0.66 m²Headroom1.87 mMinimum number of berths6Personal gear stowage0.24 m³Fresh water capacity228 lMinimum number of seats in cockpit6Food stowage0.36 m³Fuel capacity122 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.