Club Certificate2025
HamboS 55
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 Angles43.1°43.1°41.3°40.2°39.3°39.0°39.0°39.4°41.3°
Beat VMG2.032.793.383.804.084.224.294.314.16
52°3.144.235.015.545.846.006.096.146.08
60°3.324.445.225.726.006.166.266.336.31
75°3.414.575.375.866.156.346.486.636.67
90°3.424.655.556.036.256.396.576.857.00
110°3.484.745.656.166.476.716.887.107.18
120°3.334.585.526.106.466.757.007.407.65
135°2.994.175.135.856.286.616.917.518.10
150°2.543.634.595.385.966.336.637.217.83
Run VMG2.193.143.984.705.325.816.186.757.27
Gybe Angles148.3°148.3°152.3°155.7°162.4°168.7°176.3°178.1°177.7°
APH ToD:670.8CDL: 6.306APH ToT: 0.8944CertNo:
BOAT
ClassMistress 32DesignerOlle EnderleinBuilderTage Larsson, OrusAge date01/1968Series date01/1979Offset filee172.offData fileS55
HULL
Length Overall9.011 mMaximum Beam2.858 mDraft1.705 mDisplacement3,300 kgDLR11.6146IMS DivisionCruiser/RacerDynamic Allowance0.560%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.300m
CREW
Maximum weight400 kg(declared)Minimum weight270 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail17.7818.27Headsail Luffed22.7722.77Headsail FlyingSymmetric59.2059.20Asymmetric
STORM SAIL AREAS (m²)
Trysail5.21Storm Jib6.97Heavy Weather Jib18.80
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
HamboS 55
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 VMG1771.31290.41066.3947.2882.2852.5839.8835.4864.4
52°1146.4850.8717.9650.2616.6600.0591.3586.3591.7
60°1086.0810.8689.5629.7600.1584.4575.1568.4570.5
75°1056.4788.5670.7614.3585.6567.8555.8542.7539.8
90°1054.0773.8649.0597.4575.9563.7547.7525.8514.1
110°1034.2759.4636.9584.1556.0536.9523.5506.7501.7
120°1081.5786.9652.3590.2557.4533.1514.0486.7470.5
135°1203.2863.2701.2615.7573.5544.7520.6479.6444.4
150°1418.7992.8784.7668.8604.4568.9542.7499.4459.7
Run VMG1642.11146.4904.1765.9676.2619.7582.8533.7495.3
Selected Courses
Windward / Leeward1705.51218.4985.2856.5779.2736.1711.3684.6679.9
All purpose1308.8948.5780.3693.2645.7619.1601.6580.4573.3
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward817.10.7343
All purpose670.80.8944
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6256
Downwind "popa"0.8033
70% up, 30% down "Ilhabela"0.6700
30% up, 70% down "Ilhabela-inverso"0.7402
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Predominantly Upwind731.60.8201
Predominantly Downwind671.90.8930
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low864.40.6941
Triple Number AP Medium666.20.9006
Triple Number AP High598.01.0033
Triple Number Windward/Leeward Low1149.40.5220
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Single Number Predominant Upwind762.00.7874
Single Number Predominant Reaching669.10.8968
Single Number Predominant Downwind701.60.8552
Predominant Upwind - Low1055.10.5687
Predominant Upwind - Low/Med805.90.7445
Predominant Upwind - Medium707.30.8483
Predominant Upwind - Med/High659.20.9102
Predominant Upwind - High644.00.9317
Predominant Downwind Low1024.10.5859
Predominant Downwind Low/Med759.20.7903
Predominant Downwind Medium647.50.9266
Predominant Downwind Med/High581.21.0323
Predominant Downwind High545.91.0991
Predominant Reaching Low928.60.6462
Predominant Reaching Low/Med708.60.8467
Predominant Reaching Medium623.80.9619
Predominant Reaching Med/High576.51.0408
Predominant Reaching High551.11.0888
SA/DSPL Upwind18.22SA/DSPL Downwind34.59
Scoring OptionTODTOT
5-Band Windward/Leeward Low1282.20.4680
5-Band Windward/Leeward Low/Med943.80.6357
5-Band Windward/Leeward Medium796.40.7534
5-Band Windward/Leeward Med/High716.70.8372
5-Band Windward/Leeward High688.40.8716
Windward/Leeward 60-40 Low1296.70.4627
Windward/Leeward 60-40 Low/Med961.00.6243
Windward/Leeward 60-40 Medium817.10.7343
Windward/Leeward 60-40 Med/High742.30.8083
Windward/Leeward 60-40 High719.00.8346
5-Band AP Low952.40.6300
5-Band AP Low/Med754.50.7952
5-Band AP Medium656.70.9137
5-Band AP Med/High604.70.9922
5-Band AP High582.81.0294
5-Band SF Bay Tour - Low1113.10.5390
5-Band SF Bay Tour - Low/Med907.40.6612
5-Band SF Bay Tour - Medium773.70.7755
5-Band SF Bay Tour - Med/High703.40.8530
5-Band SF Bay Tour - High678.30.8846
Chicago-Mac Upwind0.7625
Chicago-Mac All Purpose0.7956
Chicago-Mac Downwind0.8254
Bayview-Mac Cove Island0.5835
Bayview-Mac Shore0.5869
Harvest Moon Regatta584.01.0275
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance727.6
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating727.60.8246
FinRating, kevyt tuuli1259.40.7940
FinRating, kova tuuli587.60.8509
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8246
Triple Number Coastal/Long Distance Low0.6941
Triple Number Coastal/Long Distance Medium0.9007
Triple Number Coastal/Long Distance High1.0033
Triple Number Windward/Leeward Low0.5446
Triple Number Windward/Leeward Medium0.7395
Triple Number Windward/Leeward High0.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
For information
General Purpose Handicap (GPH)753.3
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low864.4
Triple Number Coastal/Long Distance Medium666.1
Triple Number Coastal/Long Distance High598.0
Triple Number Windward/Leeward Low1101.7
Triple Number Windward/Leeward Medium811.4
Triple Number Windward/Leeward High707.5
Predominantly Upwind731.6
Predominantly Downwind671.9
Predominantly Reaching650.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6941
Triple Number Coastal/Long Distance Medium0.9007
Triple Number Coastal/Long Distance High1.0033
Triple Number Windward/Leeward Low0.5446
Triple Number Windward/Leeward Medium0.7395
Triple Number Windward/Leeward High0.8481
Coastal/Long Distance0.8246
Predominantly Upwind0.8201
Predominantly Downwind0.8930
For information
General Purpose Handicap (GPH)753.3
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.8944
Distanseseilas Trippeltall svak vind0.6941
Distanseseilas Trippeltall mellomvind0.9007
Distanseseilas Trippeltall sterk vind1.0033
Pølsebane Trippeltall svak vind0.5446
Pølsebane Trippeltall mellomvind0.7395
Pølsebane Trippeltall sterk vind0.8481
Motvind Singeltall0.8201
Medvind Singeltall0.8930
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Coastal/Long Distance727.60.8246
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind731.60.8201
Predominantly Downwind671.90.8930
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore681.30.8807
Cape Doctor Coastal575.41.0427
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6941
Triple Number Coastal/Long Distance Medium0.9007
Triple Number Coastal/Long Distance High1.0033
Triple Number Windward/Leeward Low0.5446
Triple Number Windward/Leeward Medium0.7395
Triple Number Windward/Leeward High0.8481
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6941
Triple Number Coastal/Long Distance Medium0.9007
Triple Number Coastal/Long Distance High1.0033
Triple Number Windward/Leeward Low0.5446
Triple Number Windward/Leeward Medium0.7395
Triple Number Windward/Leeward High0.8481
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Predominantly Upwind731.60.8201
Predominantly Downwind671.90.8930
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance727.60.8246
Triple Number Coastal/Long Distance Low864.40.6941
Triple Number Coastal/Long Distance Medium666.10.9007
Triple Number Coastal/Long Distance High598.01.0033
Triple Number Windward/Leeward Low1101.70.5446
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1793.71211.2926.9775.8688.0642.0607.6555.8545.0
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low864.40.6941
Triple Number AP Medium666.20.9006
Triple Number AP High598.01.0033
Triple Number Windward/Leeward Low1149.40.5220
Triple Number Windward/Leeward Medium811.40.7395
Triple Number Windward/Leeward High707.50.8481
Single Number Predominant Upwind762.00.7874
Single Number Predominant Reaching669.10.8968
Single Number Predominant Downwind701.60.8552
Predominant Upwind - Low1055.10.5687
Predominant Upwind - Low/Med805.90.7445
Predominant Upwind - Medium707.30.8483
Predominant Upwind - Med/High659.20.9102
Predominant Upwind - High644.00.9317
Predominant Downwind Low1024.10.5859
Predominant Downwind Low/Med759.20.7903
Predominant Downwind Medium647.50.9266
Predominant Downwind Med/High581.21.0323
Predominant Downwind High545.91.0991
Predominant Reaching Low928.60.6462
Predominant Reaching Low/Med708.60.8467
Predominant Reaching Medium623.80.9619
Predominant Reaching Med/High576.51.0408
Predominant Reaching High551.11.0888
SA/DSPL Upwind18.22SA/DSPL Downwind34.59
Scoring OptionTODTOT
5-Band Windward/Leeward Low1282.20.4680
5-Band Windward/Leeward Low/Med943.80.6357
5-Band Windward/Leeward Medium796.40.7534
5-Band Windward/Leeward Med/High716.70.8372
5-Band Windward/Leeward High688.40.8716
Windward/Leeward 60-40 Low1296.70.4627
Windward/Leeward 60-40 Low/Med961.00.6243
Windward/Leeward 60-40 Medium817.10.7343
Windward/Leeward 60-40 Med/High742.30.8083
Windward/Leeward 60-40 High719.00.8346
5-Band AP Low952.40.6300
5-Band AP Low/Med754.50.7952
5-Band AP Medium656.70.9137
5-Band AP Med/High604.70.9922
5-Band AP High582.81.0294
5-Band SF Bay Tour - Low1113.10.5390
5-Band SF Bay Tour - Low/Med907.40.6612
5-Band SF Bay Tour - Medium773.70.7755
5-Band SF Bay Tour - Med/High703.40.8530
5-Band SF Bay Tour - High678.30.8846
Chicago-Mac Upwind0.7625
Chicago-Mac All Purpose0.7956
Chicago-Mac Downwind0.8254
Bayview-Mac Cove Island0.5835
Bayview-Mac Shore0.5869
Harvest Moon Regatta584.01.0275
Club Certificate2025
HamboS 55
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMistress 32Measurement05/07/2020HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.011Max. Beam2.858Draft1.705Displacement3,300Wetted area17.92IMS L6.882LSM06.574Acc. length9.011Sink (kg/mm) 11.36
VCGD-0.009VCGM0.040RM Rated (kg·m) 48.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight378Declared crew weight400
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.300PBWPIPA0.0009
PSDPHDPHL
PSAESL
ST1ST2ST3
ST4ST5
RIG
Forestay tensionFixedInner stayFixedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P9.600IG11.800ISP11.800MDT10.132MDL10.189MDT2MDL2TLNo TaperMWGO
E3.100J3.400BAS1.350FSDSFJSPL3.580WPLTPSBDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date10/06/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
HamboS 55
Avomeripurjehtijat ry
c/o Mainoskauppa Oy
Melkonkatu 16 B
00210 HELSINKI
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.100.661.192.002.6117.78
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment24.2410.55NoNo 22.7703/06/202510.030.370.741.582.573.6810.55NoNo 17.93
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment111.1011.1011.106.406.4059.20
CRUISER/RACER REQUIREMENTS*
Accommodation length9.0 mTable area0.44 m²Headroom1.62 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity60 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity30 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.