Club Certificate2025
MytriXNOR 4458
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 Angles42.9°42.9°40.4°38.7°38.2°38.4°38.5°39.1°41.0°
Beat VMG2.463.364.024.394.534.584.614.614.49
52°3.845.075.856.216.366.436.476.516.49
60°4.085.316.026.366.526.596.646.716.72
75°4.205.446.146.496.696.836.927.057.12
90°4.055.326.116.526.766.967.137.407.61
110°3.845.206.146.616.927.207.467.888.22
120°3.644.995.986.526.887.207.538.308.88
135°3.164.435.486.226.656.997.358.219.67
150°2.593.754.815.706.316.697.027.738.79
Run VMG2.243.244.174.965.666.186.577.197.88
Gybe Angles146.6°146.6°151.0°154.8°163.5°170.9°178.1°178.6°175.9°
APH ToD:615.1CDL: 7.326APH ToT: 0.9755CertNo:676463
BOAT
ClassX-95DesignerJeppesenBuilderNordsøe verftAge dateSeries date01/1982Offset fileX-95.offData file676463
HULL
Length Overall9.240 mMaximum Beam3.240 mDraft1.763 mDisplacement3,050 kgDLR8.1790IMS DivisionCruiser/RacerDynamic Allowance0.010%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.340m
CREW
Maximum weight431 kg(default)Minimum weight301 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail28.1528.73Headsail Luffed24.2224.22Headsail FlyingSymmetric52.8252.82Asymmetric
STORM SAIL AREAS (m²)
Trysail8.51Storm Jib5.73Heavy Weather Jib15.46
SAIL LIMITS
Headsails5Spinnakers4
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
MytriXNOR 4458
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 VMG1461.71071.5895.8820.1795.1785.5781.0781.6802.3
52°937.2709.5615.5579.7565.7559.8556.4552.8554.5
60°883.1678.2597.6566.3552.3545.9541.8536.6536.0
75°857.4661.8586.1555.0538.1527.3520.6510.9505.8
90°888.8676.6589.5552.3532.6517.2505.0486.2473.0
110°937.0692.8586.6544.9520.0500.3482.4456.9437.9
120°989.1722.1602.4552.1523.5500.1478.3433.7405.4
135°1137.9811.8656.8578.6541.5514.9490.1438.4372.3
150°1392.5961.0748.9632.0570.4537.8512.9465.6409.6
Run VMG1610.11109.7864.1725.2636.2582.5547.8500.8456.7
Selected Courses
Windward / Leeward1533.61090.6880.0772.6715.7684.0664.4641.2629.5
All purpose1153.1840.6697.6630.1596.1576.2561.9539.7523.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward747.10.8031
All purpose615.10.9755
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7082
Downwind "popa"0.8457
70% up, 30% down "Ilhabela"0.7445
30% up, 70% down "Ilhabela-inverso"0.7991
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Predominantly Upwind661.90.9065
Predominantly Downwind623.60.9621
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low769.10.7801
Triple Number AP Medium611.00.9820
Triple Number AP High557.11.0769
Triple Number Windward/Leeward Low1029.60.5827
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Single Number Predominant Upwind686.20.8743
Single Number Predominant Reaching612.40.9798
Single Number Predominant Downwind651.20.9214
Predominant Upwind - Low906.70.6617
Predominant Upwind - Low/Med711.20.8436
Predominant Upwind - Medium644.40.9311
Predominant Upwind - Med/High614.10.9771
Predominant Upwind - High600.60.9990
Predominant Downwind Low943.90.6356
Predominant Downwind Low/Med702.10.8546
Predominant Downwind Medium603.10.9948
Predominant Downwind Med/High543.41.1041
Predominant Downwind High505.41.1872
Predominant Reaching Low825.90.7265
Predominant Reaching Low/Med644.00.9317
Predominant Reaching Medium576.51.0408
Predominant Reaching Med/High536.71.1179
Predominant Reaching High509.81.1770
SA/DSPL Upwind24.81SA/DSPL Downwind38.36
Scoring OptionTODTOT
5-Band Windward/Leeward Low1149.30.5221
5-Band Windward/Leeward Low/Med848.90.7068
5-Band Windward/Leeward Medium729.20.8228
5-Band Windward/Leeward Med/High668.10.8981
5-Band Windward/Leeward High643.20.9329
Windward/Leeward 60-40 Low1144.40.5243
Windward/Leeward 60-40 Low/Med855.10.7016
Windward/Leeward 60-40 Medium744.30.8061
Windward/Leeward 60-40 Med/High691.10.8682
Windward/Leeward 60-40 High671.50.8935
5-Band AP Low850.70.7053
5-Band AP Low/Med679.90.8825
5-Band AP Medium604.00.9933
5-Band AP Med/High563.41.0649
5-Band AP High540.61.1098
5-Band SF Bay Tour - Low988.40.6070
5-Band SF Bay Tour - Low/Med812.50.7385
5-Band SF Bay Tour - Medium707.70.8479
5-Band SF Bay Tour - Med/High655.50.9154
5-Band SF Bay Tour - High631.60.9500
Chicago-Mac Upwind0.8526
Chicago-Mac All Purpose0.8741
Chicago-Mac Downwind0.8899
Bayview-Mac Cove Island0.6502
Bayview-Mac Shore0.6559
Harvest Moon Regatta539.21.1128
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance666.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating666.70.8999
FinRating, kevyt tuuli1130.50.8845
FinRating, kova tuuli543.20.9205
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8999
Triple Number Coastal/Long Distance Low0.7801
Triple Number Coastal/Long Distance Medium0.9821
Triple Number Coastal/Long Distance High1.0769
Triple Number Windward/Leeward Low0.6090
Triple Number Windward/Leeward Medium0.8103
Triple Number Windward/Leeward High0.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
For information
General Purpose Handicap (GPH)685.6
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low769.1
Triple Number Coastal/Long Distance Medium610.9
Triple Number Coastal/Long Distance High557.2
Triple Number Windward/Leeward Low985.2
Triple Number Windward/Leeward Medium740.5
Triple Number Windward/Leeward High660.6
Predominantly Upwind661.9
Predominantly Downwind623.6
Predominantly Reaching600.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7801
Triple Number Coastal/Long Distance Medium0.9821
Triple Number Coastal/Long Distance High1.0769
Triple Number Windward/Leeward Low0.6090
Triple Number Windward/Leeward Medium0.8103
Triple Number Windward/Leeward High0.9083
Coastal/Long Distance0.8999
Predominantly Upwind0.9065
Predominantly Downwind0.9621
For information
General Purpose Handicap (GPH)685.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9755
Distanseseilas Trippeltall svak vind0.7801
Distanseseilas Trippeltall mellomvind0.9821
Distanseseilas Trippeltall sterk vind1.0769
Pølsebane Trippeltall svak vind0.6090
Pølsebane Trippeltall mellomvind0.8103
Pølsebane Trippeltall sterk vind0.9083
Motvind Singeltall0.9065
Medvind Singeltall0.9621
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Coastal/Long Distance666.70.8999
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind661.90.9065
Predominantly Downwind623.60.9621
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore633.00.9479
Cape Doctor Coastal528.01.1364
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7801
Triple Number Coastal/Long Distance Medium0.9821
Triple Number Coastal/Long Distance High1.0769
Triple Number Windward/Leeward Low0.6090
Triple Number Windward/Leeward Medium0.8103
Triple Number Windward/Leeward High0.9083
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7801
Triple Number Coastal/Long Distance Medium0.9821
Triple Number Coastal/Long Distance High1.0769
Triple Number Windward/Leeward Low0.6090
Triple Number Windward/Leeward Medium0.8103
Triple Number Windward/Leeward High0.9083
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Predominantly Upwind661.90.9065
Predominantly Downwind623.60.9621
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance666.70.8999
Triple Number Coastal/Long Distance Low769.10.7801
Triple Number Coastal/Long Distance Medium610.90.9821
Triple Number Coastal/Long Distance High557.21.0769
Triple Number Windward/Leeward Low985.20.6090
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1635.81092.5830.9702.9634.2597.5567.7514.6496.8
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low769.10.7801
Triple Number AP Medium611.00.9820
Triple Number AP High557.11.0769
Triple Number Windward/Leeward Low1029.60.5827
Triple Number Windward/Leeward Medium740.50.8103
Triple Number Windward/Leeward High660.60.9083
Single Number Predominant Upwind686.20.8743
Single Number Predominant Reaching612.40.9798
Single Number Predominant Downwind651.20.9214
Predominant Upwind - Low906.70.6617
Predominant Upwind - Low/Med711.20.8436
Predominant Upwind - Medium644.40.9311
Predominant Upwind - Med/High614.10.9771
Predominant Upwind - High600.60.9990
Predominant Downwind Low943.90.6356
Predominant Downwind Low/Med702.10.8546
Predominant Downwind Medium603.10.9948
Predominant Downwind Med/High543.41.1041
Predominant Downwind High505.41.1872
Predominant Reaching Low825.90.7265
Predominant Reaching Low/Med644.00.9317
Predominant Reaching Medium576.51.0408
Predominant Reaching Med/High536.71.1179
Predominant Reaching High509.81.1770
SA/DSPL Upwind24.81SA/DSPL Downwind38.36
Scoring OptionTODTOT
5-Band Windward/Leeward Low1149.30.5221
5-Band Windward/Leeward Low/Med848.90.7068
5-Band Windward/Leeward Medium729.20.8228
5-Band Windward/Leeward Med/High668.10.8981
5-Band Windward/Leeward High643.20.9329
Windward/Leeward 60-40 Low1144.40.5243
Windward/Leeward 60-40 Low/Med855.10.7016
Windward/Leeward 60-40 Medium744.30.8061
Windward/Leeward 60-40 Med/High691.10.8682
Windward/Leeward 60-40 High671.50.8935
5-Band AP Low850.70.7053
5-Band AP Low/Med679.90.8825
5-Band AP Medium604.00.9933
5-Band AP Med/High563.41.0649
5-Band AP High540.61.1098
5-Band SF Bay Tour - Low988.40.6070
5-Band SF Bay Tour - Low/Med812.50.7385
5-Band SF Bay Tour - Medium707.70.8479
5-Band SF Bay Tour - Med/High655.50.9154
5-Band SF Bay Tour - High631.60.9500
Chicago-Mac Upwind0.8526
Chicago-Mac All Purpose0.8741
Chicago-Mac Downwind0.8899
Bayview-Mac Cove Island0.6502
Bayview-Mac Shore0.6559
Harvest Moon Regatta539.21.1128
Club Certificate2025
MytriXNOR 4458
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassX-95MeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.240Max. Beam3.240Draft1.763Displacement3,050Wetted area17.28IMS L7.598LSM07.197Acc. length9.240Sink (kg/mm) 12.42
VCGD0.050VCGM0.083RM Rated (kg·m) 54.7Limit of positive stability(°) N/AStability IndexN/ADefault crew weight431Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.340PBWPIPA0.0062
PSD0.030PHD0.080PHL0.130
PSA15.0°ESL0.700
ST10.030ST20.100ST30.150
ST40.150ST50.150
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P11.300IG10.700ISP10.700MDT10.090MDL10.130MDT2MDL2TLTaperMW0.000GO0.000
E4.300J3.200BAS1.620FSDFoilSFJ0.000SPL3.360WPLTPS0.000BD0.000MWT85.00MCG4.030
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.050Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
MytriXNOR 4458
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment366-2024081221420.130.881.552.643.5428.1512/08/2024625-2024121914340.150.861.552.633.5128.0219/12/2024
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment625-2024121914390.050.561.102.263.504.7810.42NoNo 24.2219/12/2024625-2024121808100.050.490.911.642.353.0910.18YesNo 16.4018/12/2024
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment366-20240812215210.6710.6710.675.955.9052.8212/08/2024
CRUISER/RACER REQUIREMENTS*
Accommodation length9.2 mTable area0.44 m²Headroom1.64 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity64 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity34 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.