Club Certificate2025
TintagelSWE-1850_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 Angles44.9°44.9°42.3°40.9°40.9°40.5°40.1°39.6°39.6°
Beat VMG2.683.724.545.105.435.645.795.966.01
52°4.295.776.827.558.008.238.368.498.57
60°4.626.137.157.868.278.508.628.748.82
75°4.856.397.408.098.498.748.919.069.18
90°4.756.297.338.088.558.839.059.359.52
110°4.466.127.408.298.789.119.369.689.91
120°4.335.967.238.168.719.089.389.8910.22
135°3.795.326.597.628.368.829.179.7810.35
150°3.094.455.676.697.578.278.739.389.96
Run VMG2.673.854.915.806.587.287.908.839.43
Gybe Angles142.0°142.0°146.6°148.9°152.6°158.0°168.7°179.0°179.2°
APH ToD:505.4CDL: 12.230APH ToT: 1.1871CertNo:185001
BOAT
ClassPROTOTYPE HOEKDesignerHoek DesignBuilderVittersAge date02/1993Series date02/1993Offset filehoekclub.offData fileSWE1850_C
HULL
Length Overall16.790 mMaximum Beam4.540 mDraft2.557 mDisplacement28,502 kgDLR9.9048IMS DivisionCruiser/RacerDynamic Allowance0.690%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFeathering 4 bladesDiameter0.300m
CREW
Maximum weight1,138 kg(default)Minimum weight967 kg ✱ when appliedNon Manual PowerYesCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail86.8788.85Headsail Luffed85.0085.00Headsail FlyingSymmetricAsymmetric189.58189.58 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail25.78Storm Jib23.70Heavy Weather Jib63.99
SAIL LIMITS
Headsails7
✱ One set on the forestay
Spinnakers5
✱ Asymmetric may be tacked on the pole
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
TintagelSWE-1850_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 VMG1342.8968.4793.2706.2662.9637.8622.1604.2599.4
52°838.4623.9527.6476.6450.0437.4430.4424.1420.1
60°778.5587.1503.5458.1435.3423.6417.7412.1408.2
75°741.8563.2486.7445.2424.0411.9404.2397.2392.1
90°758.3572.4491.0445.4420.9407.6397.9385.0378.2
110°806.5587.9486.4434.4409.8395.3384.6371.9363.2
120°830.6604.1497.7440.9413.2396.6383.8363.9352.2
135°949.3677.1546.0472.5430.8408.1392.7368.0347.8
150°1165.5809.0635.0537.9475.3435.4412.3383.9361.3
Run VMG1345.9934.2733.3621.1547.4494.7455.8407.9381.9
Selected Courses
Windward / Leeward1343.5951.3763.3663.7605.1566.3538.9506.0490.6
All purpose1004.0725.8594.8525.1486.5462.9447.2428.4417.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward630.60.9515
All purpose505.41.1871
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8409
Downwind "popa"1.0013
70% up, 30% down "Ilhabela"0.8833
30% up, 70% down "Ilhabela-inverso"0.9471
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Predominantly Upwind546.91.0970
Predominantly Downwind516.61.1614
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low660.30.9087
Triple Number AP Medium502.51.1940
Triple Number AP High444.11.3511
Triple Number Windward/Leeward Low896.00.6696
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Single Number Predominant Upwind568.51.0554
Single Number Predominant Reaching501.51.1963
Single Number Predominant Downwind539.71.1117
Predominant Upwind - Low795.10.7546
Predominant Upwind - Low/Med604.90.9919
Predominant Upwind - Medium528.01.1363
Predominant Upwind - Med/High487.21.2315
Predominant Upwind - High469.81.2771
Predominant Downwind Low801.10.7489
Predominant Downwind Low/Med589.71.0175
Predominant Downwind Medium496.71.2081
Predominant Downwind Med/High439.41.3656
Predominant Downwind High410.21.4626
Predominant Reaching Low704.90.8511
Predominant Reaching Low/Med536.81.1178
Predominant Reaching Medium466.31.2867
Predominant Reaching Med/High426.91.4054
Predominant Reaching High407.81.4712
SA/DSPL Upwind18.22SA/DSPL Downwind29.30
Scoring OptionTODTOT
5-Band Windward/Leeward Low1002.50.5985
5-Band Windward/Leeward Low/Med732.50.8191
5-Band Windward/Leeward Medium616.00.9741
5-Band Windward/Leeward Med/High543.61.1038
5-Band Windward/Leeward High509.11.1786
Windward/Leeward 60-40 Low1005.70.5966
Windward/Leeward 60-40 Low/Med739.80.8110
Windward/Leeward 60-40 Medium627.40.9563
Windward/Leeward 60-40 Med/High559.91.0716
Windward/Leeward 60-40 High528.51.1352
5-Band AP Low727.80.8244
5-Band AP Low/Med573.51.0462
5-Band AP Medium494.71.2130
5-Band AP Med/High450.01.3333
5-Band AP High429.81.3960
5-Band SF Bay Tour - Low862.00.6960
5-Band SF Bay Tour - Low/Med698.70.8587
5-Band SF Bay Tour - Medium592.51.0126
5-Band SF Bay Tour - Med/High529.81.1325
5-Band SF Bay Tour - High500.61.1985
Chicago-Mac Upwind1.0193
Chicago-Mac All Purpose1.0476
Chicago-Mac Downwind1.0681
Bayview-Mac Cove Island0.7586
Bayview-Mac Shore0.7648
Harvest Moon Regatta436.01.3763
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance553.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating553.01.0850
FinRating, kevyt tuuli982.41.0179
FinRating, kova tuuli432.91.1549
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0850
Triple Number Coastal/Long Distance Low0.9087
Triple Number Coastal/Long Distance Medium1.1941
Triple Number Coastal/Long Distance High1.3511
Triple Number Windward/Leeward Low0.6999
Triple Number Windward/Leeward Medium0.9553
Triple Number Windward/Leeward High1.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
For information
General Purpose Handicap (GPH)569.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low660.3
Triple Number Coastal/Long Distance Medium502.5
Triple Number Coastal/Long Distance High444.1
Triple Number Windward/Leeward Low857.3
Triple Number Windward/Leeward Medium628.1
Triple Number Windward/Leeward High533.4
Predominantly Upwind546.9
Predominantly Downwind516.6
Predominantly Reaching492.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9087
Triple Number Coastal/Long Distance Medium1.1941
Triple Number Coastal/Long Distance High1.3511
Triple Number Windward/Leeward Low0.6999
Triple Number Windward/Leeward Medium0.9553
Triple Number Windward/Leeward High1.1248
Coastal/Long Distance1.0850
Predominantly Upwind1.0970
Predominantly Downwind1.1614
For information
General Purpose Handicap (GPH)569.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.1871
Distanseseilas Trippeltall svak vind0.9087
Distanseseilas Trippeltall mellomvind1.1941
Distanseseilas Trippeltall sterk vind1.3511
Pølsebane Trippeltall svak vind0.6999
Pølsebane Trippeltall mellomvind0.9553
Pølsebane Trippeltall sterk vind1.1248
Motvind Singeltall1.0970
Medvind Singeltall1.1614
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Coastal/Long Distance553.01.0850
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind546.91.0970
Predominantly Downwind516.61.1614
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore495.31.2115
Cape Doctor Coastal420.81.4259
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9087
Triple Number Coastal/Long Distance Medium1.1941
Triple Number Coastal/Long Distance High1.3511
Triple Number Windward/Leeward Low0.6999
Triple Number Windward/Leeward Medium0.9553
Triple Number Windward/Leeward High1.1248
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9087
Triple Number Coastal/Long Distance Medium1.1941
Triple Number Coastal/Long Distance High1.3511
Triple Number Windward/Leeward Low0.6999
Triple Number Windward/Leeward Medium0.9553
Triple Number Windward/Leeward High1.1248
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Predominantly Upwind546.91.0970
Predominantly Downwind516.61.1614
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance553.01.0850
Triple Number Coastal/Long Distance Low660.30.9087
Triple Number Coastal/Long Distance Medium502.51.1941
Triple Number Coastal/Long Distance High444.11.3511
Triple Number Windward/Leeward Low857.30.6999
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1428.3949.6717.0595.1521.6481.1451.8410.6400.0
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low660.30.9087
Triple Number AP Medium502.51.1940
Triple Number AP High444.11.3511
Triple Number Windward/Leeward Low896.00.6696
Triple Number Windward/Leeward Medium628.10.9553
Triple Number Windward/Leeward High533.41.1248
Single Number Predominant Upwind568.51.0554
Single Number Predominant Reaching501.51.1963
Single Number Predominant Downwind539.71.1117
Predominant Upwind - Low795.10.7546
Predominant Upwind - Low/Med604.90.9919
Predominant Upwind - Medium528.01.1363
Predominant Upwind - Med/High487.21.2315
Predominant Upwind - High469.81.2771
Predominant Downwind Low801.10.7489
Predominant Downwind Low/Med589.71.0175
Predominant Downwind Medium496.71.2081
Predominant Downwind Med/High439.41.3656
Predominant Downwind High410.21.4626
Predominant Reaching Low704.90.8511
Predominant Reaching Low/Med536.81.1178
Predominant Reaching Medium466.31.2867
Predominant Reaching Med/High426.91.4054
Predominant Reaching High407.81.4712
SA/DSPL Upwind18.22SA/DSPL Downwind29.30
Scoring OptionTODTOT
5-Band Windward/Leeward Low1002.50.5985
5-Band Windward/Leeward Low/Med732.50.8191
5-Band Windward/Leeward Medium616.00.9741
5-Band Windward/Leeward Med/High543.61.1038
5-Band Windward/Leeward High509.11.1786
Windward/Leeward 60-40 Low1005.70.5966
Windward/Leeward 60-40 Low/Med739.80.8110
Windward/Leeward 60-40 Medium627.40.9563
Windward/Leeward 60-40 Med/High559.91.0716
Windward/Leeward 60-40 High528.51.1352
5-Band AP Low727.80.8244
5-Band AP Low/Med573.51.0462
5-Band AP Medium494.71.2130
5-Band AP Med/High450.01.3333
5-Band AP High429.81.3960
5-Band SF Bay Tour - Low862.00.6960
5-Band SF Bay Tour - Low/Med698.70.8587
5-Band SF Bay Tour - Medium592.51.0126
5-Band SF Bay Tour - Med/High529.81.1325
5-Band SF Bay Tour - High500.61.1985
Chicago-Mac Upwind1.0193
Chicago-Mac All Purpose1.0476
Chicago-Mac Downwind1.0681
Bayview-Mac Cove Island0.7586
Bayview-Mac Shore0.7648
Harvest Moon Regatta436.01.3763
Club Certificate2025
TintagelSWE-1850_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassPROTOTYPE HOEKMeasurement10/04/2025HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA16.790Max. Beam4.540Draft2.557Displacement28,502Wetted area62.27IMS L14.310LSM014.222Acc. length14.755Sink (kg/mm) 41.13
VCGD0.051VCGM-0.079RM Rated (kg·m) 513.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight1,138Declared crew weightN/A
PROPELLER
Propeller TypeFeathering 4 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.300PBWPIPA0.0013
PSDPHDPHL
PSAESL
ST1ST2ST3
ST4ST5
RIG
Forestay tensionFixedInner stayAdjustableMast materialCarbonSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1Checkstays1Spreaders2Rotating mastNo
P19.640IG21.770ISP21.770MDT10.210MDL10.351MDT20.165MDL20.276TL4.000MWGO
E7.500J6.250BAS1.510FSD0.100SFJ0.450SPL6.350WPLTPSBD0.380MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered520.0Flotation Date01/01/2010
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
TintagelSWE-1850_C
RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.201.582.734.6886.87
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.151.011.974.028.4520.40NoNo 85.00
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment022.0520.6021.3310.869.90110%189.58
CRUISER/RACER REQUIREMENTS*
Accommodation length14.8 mTable area0.66 m²Headroom1.90 mMinimum number of berths6Personal gear stowage0.24 m³Fresh water capacity264 lMinimum number of seats in cockpit6Food stowage0.36 m³Fuel capacity146 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.