Club Certificate2025
ArielFIN 11012
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
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°42.1°40.4°38.9°38.2°37.8°38.6°39.7°
Beat VMG2.303.223.974.504.885.055.145.205.13
52°3.634.965.946.576.957.157.247.357.36
60°3.885.246.216.797.137.357.487.637.68
75°4.025.456.477.047.387.617.858.138.30
90°4.155.626.667.237.658.028.308.638.94
110°3.875.376.547.217.708.168.609.5010.29
120°3.695.176.367.117.628.148.669.7011.16
135°3.204.545.736.727.307.808.339.5911.42
150°2.623.824.945.956.807.327.798.8110.16
Run VMG2.263.314.285.155.976.587.077.938.91
Gybe Angles145.3°145.3°149.4°149.8°155.8°164.2°169.6°169.1°161.8°
APH ToD:571.0CDL: 8.828APH ToT: 1.0508CertNo:
BOAT
ClassBuckley 34DesignerBuckleyBuilderMikaTalo /Tommi LavonenAge date01/2000Series date06/1986Offset fileFIN11012.offData fileFIN11012
HULL
Length Overall10.454 mMaximum Beam3.010 mDraft1.816 mDisplacement3,200 kgDLR3.9802IMS DivisionCruiser/RacerDynamic Allowance0.250%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight500 kg(declared)Minimum weight370 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail28.3529.21Headsail Luffed21.8721.87Headsail Flying40.5440.54Symmetric62.7862.78Asymmetric
STORM SAIL AREAS (m²)
Trysail8.10Storm Jib5.11Heavy Weather Jib13.78
SAIL LIMITS
Headsails5
✱ Woven polyester sails
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
ArielFIN 11012
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
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 VMG1562.71118.0907.7799.1738.2712.4700.1692.8701.5
52°991.3726.5606.0547.7518.3503.8497.0489.9489.0
60°928.0686.9579.7530.3504.8489.6481.3471.8468.6
75°895.0660.4556.6511.4487.7473.4458.5442.6433.8
90°867.4640.7540.9497.8470.6448.7433.7417.3402.6
110°931.3669.8550.3499.0467.6441.3418.7378.8350.0
120°974.9695.8566.0506.6472.5442.4415.8371.0322.5
135°1126.6792.3627.9535.8493.4461.7432.4375.6315.3
150°1376.7943.2729.1605.5529.5491.7462.3408.6354.4
Run VMG1591.11089.1841.9699.2603.4547.3509.5454.2404.0
Selected Courses
Windward / Leeward1575.81103.6874.8749.2670.8629.8604.8573.5552.7
All purpose1177.9839.5679.0596.1547.8519.7500.3472.2450.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward708.90.8464
All purpose571.01.0508
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7410
Downwind "popa"0.8852
70% up, 30% down "Ilhabela"0.7790
30% up, 70% down "Ilhabela-inverso"0.8364
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Predominantly Upwind619.50.9685
Predominantly Downwind582.91.0293
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low759.30.7902
Triple Number AP Medium567.91.0566
Triple Number AP High494.61.2131
Triple Number Windward/Leeward Low1035.40.5795
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Single Number Predominant Upwind646.40.9283
Single Number Predominant Reaching566.11.0600
Single Number Predominant Downwind610.50.9829
Predominant Upwind - Low920.70.6517
Predominant Upwind - Low/Med689.70.8699
Predominant Upwind - Medium596.61.0057
Predominant Upwind - Med/High549.11.0926
Predominant Upwind - High529.81.1325
Predominant Downwind Low931.60.6441
Predominant Downwind Low/Med672.10.8927
Predominant Downwind Medium558.91.0736
Predominant Downwind Med/High488.51.2283
Predominant Downwind High445.41.3471
Predominant Reaching Low812.90.7381
Predominant Reaching Low/Med609.00.9851
Predominant Reaching Medium525.41.1420
Predominant Reaching Med/High474.41.2649
Predominant Reaching High444.11.3511
SA/DSPL Upwind23.04SA/DSPL Downwind41.80
Scoring OptionTODTOT
5-Band Windward/Leeward Low1164.70.5151
5-Band Windward/Leeward Low/Med834.10.7193
5-Band Windward/Leeward Medium688.60.8713
5-Band Windward/Leeward Med/High609.30.9847
5-Band Windward/Leeward High575.31.0429
Windward/Leeward 60-40 Low1167.10.5141
Windward/Leeward 60-40 Low/Med842.40.7123
Windward/Leeward 60-40 Medium701.90.8548
Windward/Leeward 60-40 Med/High628.30.9550
Windward/Leeward 60-40 High599.41.0011
5-Band AP Low845.00.7101
5-Band AP Low/Med654.00.9174
5-Band AP Medium558.11.0751
5-Band AP Med/High502.81.1933
5-Band AP High473.31.2678
5-Band SF Bay Tour - Low997.30.6016
5-Band SF Bay Tour - Low/Med796.20.7536
5-Band SF Bay Tour - Medium664.30.9032
5-Band SF Bay Tour - Med/High593.21.0114
5-Band SF Bay Tour - High560.81.0699
Chicago-Mac Upwind0.8959
Chicago-Mac All Purpose0.9233
Chicago-Mac Downwind0.9419
Bayview-Mac Cove Island0.6567
Bayview-Mac Shore0.6627
Harvest Moon Regatta486.21.2342
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance623.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating623.90.9617
FinRating, kevyt tuuli1142.70.8751
FinRating, kova tuuli474.51.0537
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9617
Triple Number Coastal/Long Distance Low0.7902
Triple Number Coastal/Long Distance Medium1.0567
Triple Number Coastal/Long Distance High1.2131
Triple Number Windward/Leeward Low0.6066
Triple Number Windward/Leeward Medium0.8527
Triple Number Windward/Leeward High1.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
For information
General Purpose Handicap (GPH)646.4
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low759.3
Triple Number Coastal/Long Distance Medium567.8
Triple Number Coastal/Long Distance High494.6
Triple Number Windward/Leeward Low989.1
Triple Number Windward/Leeward Medium703.6
Triple Number Windward/Leeward High599.3
Predominantly Upwind619.5
Predominantly Downwind582.9
Predominantly Reaching554.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7902
Triple Number Coastal/Long Distance Medium1.0567
Triple Number Coastal/Long Distance High1.2131
Triple Number Windward/Leeward Low0.6066
Triple Number Windward/Leeward Medium0.8527
Triple Number Windward/Leeward High1.0011
Coastal/Long Distance0.9617
Predominantly Upwind0.9685
Predominantly Downwind1.0293
For information
General Purpose Handicap (GPH)646.4
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0508
Distanseseilas Trippeltall svak vind0.7902
Distanseseilas Trippeltall mellomvind1.0567
Distanseseilas Trippeltall sterk vind1.2131
Pølsebane Trippeltall svak vind0.6066
Pølsebane Trippeltall mellomvind0.8527
Pølsebane Trippeltall sterk vind1.0011
Motvind Singeltall0.9685
Medvind Singeltall1.0293
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Coastal/Long Distance623.90.9617
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind619.50.9685
Predominantly Downwind582.91.0293
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore559.01.0734
Cape Doctor Coastal456.81.3135
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7902
Triple Number Coastal/Long Distance Medium1.0567
Triple Number Coastal/Long Distance High1.2131
Triple Number Windward/Leeward Low0.6066
Triple Number Windward/Leeward Medium0.8527
Triple Number Windward/Leeward High1.0011
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7902
Triple Number Coastal/Long Distance Medium1.0567
Triple Number Coastal/Long Distance High1.2131
Triple Number Windward/Leeward Low0.6066
Triple Number Windward/Leeward Medium0.8527
Triple Number Windward/Leeward High1.0011
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Predominantly Upwind619.50.9685
Predominantly Downwind582.91.0293
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance623.90.9617
Triple Number Coastal/Long Distance Low759.30.7902
Triple Number Coastal/Long Distance Medium567.81.0567
Triple Number Coastal/Long Distance High494.61.2131
Triple Number Windward/Leeward Low989.10.6066
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1683.31102.1820.6673.5585.0539.4504.8449.7424.3
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low759.30.7902
Triple Number AP Medium567.91.0566
Triple Number AP High494.61.2131
Triple Number Windward/Leeward Low1035.40.5795
Triple Number Windward/Leeward Medium703.60.8527
Triple Number Windward/Leeward High599.31.0011
Single Number Predominant Upwind646.40.9283
Single Number Predominant Reaching566.11.0600
Single Number Predominant Downwind610.50.9829
Predominant Upwind - Low920.70.6517
Predominant Upwind - Low/Med689.70.8699
Predominant Upwind - Medium596.61.0057
Predominant Upwind - Med/High549.11.0926
Predominant Upwind - High529.81.1325
Predominant Downwind Low931.60.6441
Predominant Downwind Low/Med672.10.8927
Predominant Downwind Medium558.91.0736
Predominant Downwind Med/High488.51.2283
Predominant Downwind High445.41.3471
Predominant Reaching Low812.90.7381
Predominant Reaching Low/Med609.00.9851
Predominant Reaching Medium525.41.1420
Predominant Reaching Med/High474.41.2649
Predominant Reaching High444.11.3511
SA/DSPL Upwind23.04SA/DSPL Downwind41.80
Scoring OptionTODTOT
5-Band Windward/Leeward Low1164.70.5151
5-Band Windward/Leeward Low/Med834.10.7193
5-Band Windward/Leeward Medium688.60.8713
5-Band Windward/Leeward Med/High609.30.9847
5-Band Windward/Leeward High575.31.0429
Windward/Leeward 60-40 Low1167.10.5141
Windward/Leeward 60-40 Low/Med842.40.7123
Windward/Leeward 60-40 Medium701.90.8548
Windward/Leeward 60-40 Med/High628.30.9550
Windward/Leeward 60-40 High599.41.0011
5-Band AP Low845.00.7101
5-Band AP Low/Med654.00.9174
5-Band AP Medium558.11.0751
5-Band AP Med/High502.81.1933
5-Band AP High473.31.2678
5-Band SF Bay Tour - Low997.30.6016
5-Band SF Bay Tour - Low/Med796.20.7536
5-Band SF Bay Tour - Medium664.30.9032
5-Band SF Bay Tour - Med/High593.21.0114
5-Band SF Bay Tour - High560.81.0699
Chicago-Mac Upwind0.8959
Chicago-Mac All Purpose0.9233
Chicago-Mac Downwind0.9419
Bayview-Mac Cove Island0.6567
Bayview-Mac Shore0.6627
Harvest Moon Regatta486.21.2342
Club Certificate2025
ArielFIN 11012
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassBuckley 34MeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.454Max. Beam3.010Draft1.816Displacement3,200Wetted area19.34IMS L9.472LSM09.298Acc. length9.783Sink (kg/mm) 16.06
VCGD0.175VCGM0.171RM Rated (kg·m) 75.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight620Declared crew weight500
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0014
PSDPHDPHL
PSAESL
ST1ST2ST3
ST4ST5
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P10.860IG10.100ISP10.200MDT10.090MDL10.140MDT2MDL2TLMWGO
E4.260J3.480BAS1.100FSDSFJSPL3.660WPLTPS4.620BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date02/08/2024
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
ArielFIN 11012
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.130.961.722.863.6528.35
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.001.162.204.195.825.9610.87NoYes040.5400.000.591.082.063.054.0310.63NoNo 21.87
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment110.4610.4610.467.326.7362.78
CRUISER/RACER REQUIREMENTS*
Accommodation length9.8 mTable area0.44 m²Headroom1.69 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity76 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity46 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.