Club Certificate2025
StyrmorNOR 5701
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 Angles43.3°43.3°41.1°40.0°38.9°38.1°37.8°37.8°38.8°
Beat VMG2.122.923.533.974.274.444.524.584.54
52°3.294.435.245.756.046.206.306.386.39
60°3.484.665.465.926.186.346.456.556.58
75°3.594.805.616.066.316.496.646.826.91
90°3.704.995.886.326.596.786.897.067.20
110°3.705.005.916.366.656.917.177.657.93
120°3.534.825.766.276.586.867.137.748.33
135°3.104.325.305.986.376.666.937.538.26
150°2.573.674.635.425.986.326.587.047.59
Run VMG2.233.184.014.695.225.656.016.556.97
Gybe Angles145.3°145.3°148.1°149.3°154.6°161.3°179.1°179.5°179.4°
APH ToD:651.4CDL: 6.847APH ToT: 0.9211CertNo:675921
BOAT
ClassAlbin AlphaDesignerPeterNorlinBuilderAlbinAge date01/1985Series date01/1985Offset fileCLG6411.OFFData file675921
HULL
Length Overall8.950 mMaximum Beam2.826 mDraft1.719 mDisplacement3,745 kgDLR10.1241IMS DivisionCruiser/RacerDynamic Allowance0.530%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.400m
CREW
Maximum weight429 kg(default)Minimum weight299 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail23.5523.88Headsail Luffed18.4118.41Headsail FlyingSymmetricAsymmetric49.4749.47 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail7.12Storm Jib5.73Heavy Weather Jib15.46
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
StyrmorNOR 5701
Norges Seilforbund
Sognsveien 73
0854 OSLO
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 VMG1698.31234.81019.3906.7842.9810.9795.9785.7793.2
52°1093.7812.4687.0625.7596.2580.5571.6564.6563.6
60°1034.0772.8659.4608.1582.6567.5558.0549.5546.9
75°1004.1750.7641.3594.2570.8554.8542.5527.5520.8
90°971.8720.8612.2569.7546.6531.3522.3509.9499.8
110°974.2719.4608.7566.2541.2520.7502.1470.8454.2
120°1019.6746.5624.8574.5546.9525.1504.7465.2432.1
135°1160.7834.1679.8601.8565.1540.7519.7478.1435.9
150°1400.6981.6777.4664.7602.2569.6547.5511.0474.1
Run VMG1617.81133.4897.7767.6690.1637.5598.7549.6516.1
Selected Courses
Windward / Leeward1657.21184.1958.5837.1766.5724.2697.3667.7654.7
All purpose1256.6911.7752.0672.8629.4602.9585.6562.5548.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward800.40.7497
All purpose651.40.9211
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6566
Downwind "popa"0.7963
70% up, 30% down "Ilhabela"0.6931
30% up, 70% down "Ilhabela-inverso"0.7485
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Predominantly Upwind704.60.8516
Predominantly Downwind660.20.9088
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low831.80.7213
Triple Number AP Medium647.50.9266
Triple Number AP High581.31.0322
Triple Number Windward/Leeward Low1117.80.5368
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Single Number Predominant Upwind733.00.8185
Single Number Predominant Reaching645.50.9295
Single Number Predominant Downwind688.40.8716
Predominant Upwind - Low1010.00.5940
Predominant Upwind - Low/Med774.60.7746
Predominant Upwind - Medium682.20.8795
Predominant Upwind - Med/High635.50.9441
Predominant Upwind - High618.00.9708
Predominant Downwind Low991.70.6050
Predominant Downwind Low/Med740.70.8100
Predominant Downwind Medium637.80.9407
Predominant Downwind Med/High576.11.0416
Predominant Downwind High541.11.1088
Predominant Reaching Low885.70.6774
Predominant Reaching Low/Med681.60.8803
Predominant Reaching Medium603.60.9940
Predominant Reaching Med/High560.41.0707
Predominant Reaching High536.91.1176
SA/DSPL Upwind17.33SA/DSPL Downwind30.15
Scoring OptionTODTOT
5-Band Windward/Leeward Low1246.20.4815
5-Band Windward/Leeward Low/Med920.60.6518
5-Band Windward/Leeward Medium781.40.7679
5-Band Windward/Leeward Med/High702.70.8539
5-Band Windward/Leeward High670.60.8948
Windward/Leeward 60-40 Low1256.30.4776
Windward/Leeward 60-40 Low/Med933.50.6427
Windward/Leeward 60-40 Medium796.90.7529
Windward/Leeward 60-40 Med/High722.30.8307
Windward/Leeward 60-40 High694.20.8643
5-Band AP Low914.90.6558
5-Band AP Low/Med729.50.8225
5-Band AP Medium638.70.9394
5-Band AP Med/High588.31.0199
5-Band AP High564.01.0638
5-Band SF Bay Tour - Low1078.20.5565
5-Band SF Bay Tour - Low/Med881.50.6806
5-Band SF Bay Tour - Medium754.80.7949
5-Band SF Bay Tour - Med/High685.50.8752
5-Band SF Bay Tour - High656.50.9139
Chicago-Mac Upwind0.7929
Chicago-Mac All Purpose0.8205
Chicago-Mac Downwind0.8422
Bayview-Mac Cove Island0.6037
Bayview-Mac Shore0.6080
Harvest Moon Regatta569.71.0532
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance708.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating708.50.8468
FinRating, kevyt tuuli1221.20.8189
FinRating, kova tuuli568.10.8801
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8468
Triple Number Coastal/Long Distance Low0.7213
Triple Number Coastal/Long Distance Medium0.9267
Triple Number Coastal/Long Distance High1.0322
Triple Number Windward/Leeward Low0.5601
Triple Number Windward/Leeward Medium0.7543
Triple Number Windward/Leeward High0.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
For information
General Purpose Handicap (GPH)730.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low831.8
Triple Number Coastal/Long Distance Medium647.5
Triple Number Coastal/Long Distance High581.3
Triple Number Windward/Leeward Low1071.2
Triple Number Windward/Leeward Medium795.4
Triple Number Windward/Leeward High692.9
Predominantly Upwind704.6
Predominantly Downwind660.2
Predominantly Reaching631.5
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7213
Triple Number Coastal/Long Distance Medium0.9267
Triple Number Coastal/Long Distance High1.0322
Triple Number Windward/Leeward Low0.5601
Triple Number Windward/Leeward Medium0.7543
Triple Number Windward/Leeward High0.8659
Coastal/Long Distance0.8468
Predominantly Upwind0.8516
Predominantly Downwind0.9088
For information
General Purpose Handicap (GPH)730.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9211
Distanseseilas Trippeltall svak vind0.7213
Distanseseilas Trippeltall mellomvind0.9267
Distanseseilas Trippeltall sterk vind1.0322
Pølsebane Trippeltall svak vind0.5601
Pølsebane Trippeltall mellomvind0.7543
Pølsebane Trippeltall sterk vind0.8659
Motvind Singeltall0.8516
Medvind Singeltall0.9088
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Coastal/Long Distance708.50.8468
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind704.60.8516
Predominantly Downwind660.20.9088
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore658.60.9110
Cape Doctor Coastal552.41.0862
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7213
Triple Number Coastal/Long Distance Medium0.9267
Triple Number Coastal/Long Distance High1.0322
Triple Number Windward/Leeward Low0.5601
Triple Number Windward/Leeward Medium0.7543
Triple Number Windward/Leeward High0.8659
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7213
Triple Number Coastal/Long Distance Medium0.9267
Triple Number Coastal/Long Distance High1.0322
Triple Number Windward/Leeward Low0.5601
Triple Number Windward/Leeward Medium0.7543
Triple Number Windward/Leeward High0.8659
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Predominantly Upwind704.60.8516
Predominantly Downwind660.20.9088
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance708.50.8468
Triple Number Coastal/Long Distance Low831.80.7213
Triple Number Coastal/Long Distance Medium647.50.9267
Triple Number Coastal/Long Distance High581.31.0322
Triple Number Windward/Leeward Low1071.20.5601
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1752.91179.1900.5755.9670.8625.4592.1540.3523.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low831.80.7213
Triple Number AP Medium647.50.9266
Triple Number AP High581.31.0322
Triple Number Windward/Leeward Low1117.80.5368
Triple Number Windward/Leeward Medium795.40.7543
Triple Number Windward/Leeward High692.90.8659
Single Number Predominant Upwind733.00.8185
Single Number Predominant Reaching645.50.9295
Single Number Predominant Downwind688.40.8716
Predominant Upwind - Low1010.00.5940
Predominant Upwind - Low/Med774.60.7746
Predominant Upwind - Medium682.20.8795
Predominant Upwind - Med/High635.50.9441
Predominant Upwind - High618.00.9708
Predominant Downwind Low991.70.6050
Predominant Downwind Low/Med740.70.8100
Predominant Downwind Medium637.80.9407
Predominant Downwind Med/High576.11.0416
Predominant Downwind High541.11.1088
Predominant Reaching Low885.70.6774
Predominant Reaching Low/Med681.60.8803
Predominant Reaching Medium603.60.9940
Predominant Reaching Med/High560.41.0707
Predominant Reaching High536.91.1176
SA/DSPL Upwind17.33SA/DSPL Downwind30.15
Scoring OptionTODTOT
5-Band Windward/Leeward Low1246.20.4815
5-Band Windward/Leeward Low/Med920.60.6518
5-Band Windward/Leeward Medium781.40.7679
5-Band Windward/Leeward Med/High702.70.8539
5-Band Windward/Leeward High670.60.8948
Windward/Leeward 60-40 Low1256.30.4776
Windward/Leeward 60-40 Low/Med933.50.6427
Windward/Leeward 60-40 Medium796.90.7529
Windward/Leeward 60-40 Med/High722.30.8307
Windward/Leeward 60-40 High694.20.8643
5-Band AP Low914.90.6558
5-Band AP Low/Med729.50.8225
5-Band AP Medium638.70.9394
5-Band AP Med/High588.31.0199
5-Band AP High564.01.0638
5-Band SF Bay Tour - Low1078.20.5565
5-Band SF Bay Tour - Low/Med881.50.6806
5-Band SF Bay Tour - Medium754.80.7949
5-Band SF Bay Tour - Med/High685.50.8752
5-Band SF Bay Tour - High656.50.9139
Chicago-Mac Upwind0.7929
Chicago-Mac All Purpose0.8205
Chicago-Mac Downwind0.8422
Bayview-Mac Cove Island0.6037
Bayview-Mac Shore0.6080
Harvest Moon Regatta569.71.0532
Club Certificate2025
StyrmorNOR 5701
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassAlbin AlphaMeasurementHINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA8.950Max. Beam2.826Draft1.719Displacement3,745Wetted area17.86IMS L7.417LSM07.178Acc. length8.912Sink (kg/mm) 11.67
VCGD-0.250VCGM-0.226RM Rated (kg·m) 63.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight429Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.400PBWPIPA0.0033
EDL1.350ST10.048ST20.170
ST30.170ST40.098ST50.350
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P11.300IG10.700ISP10.750MDT10.080MDL10.150MDT20.000MDL20.000TL0.000MW0.000GO0.000
E3.600J3.300BAS1.420FSDFoilSFJ0.000SPL0.000WPLTPS3.550BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.250Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
StyrmorNOR 5701
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment642-2024111509520.130.721.312.212.9523.5515/11/2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment642-2024111509560.080.800.901.782.623.3710.32YesNo 18.4115/11/2024
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment642-20241115095411.3610.3310.855.435.6596%49.4715/11/2024
CRUISER/RACER REQUIREMENTS*
Accommodation length8.9 mTable area0.33 m²Headroom1.60 mMinimum number of berths3Personal gear stowage0.12 m³Fresh water capacity44 lMinimum number of seats in cockpit3Food stowage0.18 m³Fuel capacity28 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.