Non Spin/HSFClub 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°41.1°
Beat VMG2.463.364.024.394.534.584.614.604.48
52°3.845.085.856.216.366.436.476.516.49
60°4.085.316.026.366.526.596.646.716.71
75°4.205.446.146.496.696.836.917.057.12
90°4.055.326.116.506.766.967.137.407.61
110°3.444.745.746.336.696.987.257.848.40
120°3.204.475.496.186.576.887.177.818.66
135°2.733.914.945.766.296.646.937.548.34
150°2.253.324.325.185.876.356.677.237.88
Run VMG1.952.873.754.545.265.886.336.917.47
Gybe Angles147.5°147.5°153.2°160.4°170.5°178.1°179.5°179.9°179.9°
APH ToD:633.3CDL: 7.323APH ToT: 0.9474CertNo: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 Allowance0.090%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 FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail8.51Storm Jib5.73Heavy Weather Jib15.46
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
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.
Non Spin/HSFClub 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 VMG1461.11071.2895.6820.1795.4785.8781.4782.0802.9
52°936.8709.3615.5579.7565.8559.9556.5553.0554.7
60°882.8678.0597.6566.4552.3546.0541.9536.7536.2
75°856.9661.6586.1555.0538.1527.3520.6510.9505.9
90°889.2676.4589.4553.6532.5517.1505.0486.2473.0
110°1047.3759.1627.3568.5538.2515.9496.4459.4428.6
120°1125.2805.5655.4583.0547.6523.3501.9460.9415.5
135°1319.2921.5728.3625.2572.0542.1519.6477.6431.4
150°1599.41084.9832.6694.9612.9567.3539.8498.0456.9
Run VMG1848.11252.7959.0792.2684.0612.3569.1520.7481.7
Selected Courses
Windward / Leeward1650.71161.9927.3806.2739.7699.0675.2651.3642.3
All purpose1231.2888.5729.0651.5611.3587.8572.3550.5535.6
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward773.90.7753
All purpose633.30.9474
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7081
Downwind "popa"0.7792
70% up, 30% down "Ilhabela"0.7280
30% up, 70% down "Ilhabela-inverso"0.7564
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Predominantly Upwind671.90.8930
Predominantly Downwind656.10.9144
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low808.80.7419
Triple Number AP Medium628.70.9544
Triple Number AP High568.01.0563
Triple Number Windward/Leeward Low1093.50.5487
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Single Number Predominant Upwind697.20.8606
Single Number Predominant Reaching632.20.9491
Single Number Predominant Downwind689.50.8702
Predominant Upwind - Low931.90.6439
Predominant Upwind - Low/Med724.90.8277
Predominant Upwind - Medium652.50.9196
Predominant Upwind - Med/High619.60.9684
Predominant Upwind - High607.00.9885
Predominant Downwind Low1033.60.5805
Predominant Downwind Low/Med750.60.7993
Predominant Downwind Medium631.30.9504
Predominant Downwind Med/High561.81.0679
Predominant Downwind High526.11.1404
Predominant Reaching Low871.20.6887
Predominant Reaching Low/Med668.40.8976
Predominant Reaching Medium590.61.0159
Predominant Reaching Med/High547.31.0962
Predominant Reaching High523.01.1473
SA/DSPL Upwind24.81SA/DSPL Downwind24.81
Scoring OptionTODTOT
5-Band Windward/Leeward Low1226.40.4892
5-Band Windward/Leeward Low/Med891.50.6731
5-Band Windward/Leeward Medium754.10.7956
5-Band Windward/Leeward Med/High680.60.8816
5-Band Windward/Leeward High653.90.9176
Windward/Leeward 60-40 Low1206.10.4975
Windward/Leeward 60-40 Low/Med889.20.6748
Windward/Leeward 60-40 Medium764.30.7851
Windward/Leeward 60-40 Med/High701.20.8557
Windward/Leeward 60-40 High680.20.8821
5-Band AP Low907.40.6613
5-Band AP Low/Med707.80.8477
5-Band AP Medium620.60.9668
5-Band AP Med/High574.51.0443
5-Band AP High551.71.0875
5-Band SF Bay Tour - Low1046.70.5732
5-Band SF Bay Tour - Low/Med849.90.7059
5-Band SF Bay Tour - Medium729.70.8223
5-Band SF Bay Tour - Med/High668.50.8975
5-Band SF Bay Tour - High644.70.9307
Chicago-Mac Upwind0.8383
Chicago-Mac All Purpose0.8425
Chicago-Mac Downwind0.8376
Bayview-Mac Cove Island0.6151
Bayview-Mac Shore0.6226
Harvest Moon Regatta554.71.0816
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance689.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating689.20.8705
FinRating, kevyt tuuli1209.00.8271
FinRating, kova tuuli555.00.9009
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8705
Triple Number Coastal/Long Distance Low0.7419
Triple Number Coastal/Long Distance Medium0.9545
Triple Number Coastal/Long Distance High1.0563
Triple Number Windward/Leeward Low0.5744
Triple Number Windward/Leeward Medium0.7819
Triple Number Windward/Leeward High0.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
For information
General Purpose Handicap (GPH)709.8
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low808.7
Triple Number Coastal/Long Distance Medium628.6
Triple Number Coastal/Long Distance High568.0
Triple Number Windward/Leeward Low1044.6
Triple Number Windward/Leeward Medium767.4
Triple Number Windward/Leeward High672.2
Predominantly Upwind671.9
Predominantly Downwind656.1
Predominantly Reaching622.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7419
Triple Number Coastal/Long Distance Medium0.9545
Triple Number Coastal/Long Distance High1.0563
Triple Number Windward/Leeward Low0.5744
Triple Number Windward/Leeward Medium0.7819
Triple Number Windward/Leeward High0.8926
Coastal/Long Distance0.8705
Predominantly Upwind0.8930
Predominantly Downwind0.9144
For information
General Purpose Handicap (GPH)709.8
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9474
Distanseseilas Trippeltall svak vind0.7419
Distanseseilas Trippeltall mellomvind0.9545
Distanseseilas Trippeltall sterk vind1.0563
Pølsebane Trippeltall svak vind0.5744
Pølsebane Trippeltall mellomvind0.7819
Pølsebane Trippeltall sterk vind0.8926
Motvind Singeltall0.8930
Medvind Singeltall0.9144
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Coastal/Long Distance689.20.8705
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind671.90.8930
Predominantly Downwind656.10.9144
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore645.00.9302
Cape Doctor Coastal540.11.1109
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7419
Triple Number Coastal/Long Distance Medium0.9545
Triple Number Coastal/Long Distance High1.0563
Triple Number Windward/Leeward Low0.5744
Triple Number Windward/Leeward Medium0.7819
Triple Number Windward/Leeward High0.8926
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7419
Triple Number Coastal/Long Distance Medium0.9545
Triple Number Coastal/Long Distance High1.0563
Triple Number Windward/Leeward Low0.5744
Triple Number Windward/Leeward Medium0.7819
Triple Number Windward/Leeward High0.8926
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Predominantly Upwind671.90.8930
Predominantly Downwind656.10.9144
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance689.20.8705
Triple Number Coastal/Long Distance Low808.70.7419
Triple Number Coastal/Long Distance Medium628.60.9545
Triple Number Coastal/Long Distance High568.01.0563
Triple Number Windward/Leeward Low1044.60.5744
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1786.21171.0875.6730.9651.4609.8578.7526.7506.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low808.80.7419
Triple Number AP Medium628.70.9544
Triple Number AP High568.01.0563
Triple Number Windward/Leeward Low1093.50.5487
Triple Number Windward/Leeward Medium767.40.7819
Triple Number Windward/Leeward High672.20.8926
Single Number Predominant Upwind697.20.8606
Single Number Predominant Reaching632.20.9491
Single Number Predominant Downwind689.50.8702
Predominant Upwind - Low931.90.6439
Predominant Upwind - Low/Med724.90.8277
Predominant Upwind - Medium652.50.9196
Predominant Upwind - Med/High619.60.9684
Predominant Upwind - High607.00.9885
Predominant Downwind Low1033.60.5805
Predominant Downwind Low/Med750.60.7993
Predominant Downwind Medium631.30.9504
Predominant Downwind Med/High561.81.0679
Predominant Downwind High526.11.1404
Predominant Reaching Low871.20.6887
Predominant Reaching Low/Med668.40.8976
Predominant Reaching Medium590.61.0159
Predominant Reaching Med/High547.31.0962
Predominant Reaching High523.01.1473
SA/DSPL Upwind24.81SA/DSPL Downwind24.81
Scoring OptionTODTOT
5-Band Windward/Leeward Low1226.40.4892
5-Band Windward/Leeward Low/Med891.50.6731
5-Band Windward/Leeward Medium754.10.7956
5-Band Windward/Leeward Med/High680.60.8816
5-Band Windward/Leeward High653.90.9176
Windward/Leeward 60-40 Low1206.10.4975
Windward/Leeward 60-40 Low/Med889.20.6748
Windward/Leeward 60-40 Medium764.30.7851
Windward/Leeward 60-40 Med/High701.20.8557
Windward/Leeward 60-40 High680.20.8821
5-Band AP Low907.40.6613
5-Band AP Low/Med707.80.8477
5-Band AP Medium620.60.9668
5-Band AP Med/High574.51.0443
5-Band AP High551.71.0875
5-Band SF Bay Tour - Low1046.70.5732
5-Band SF Bay Tour - Low/Med849.90.7059
5-Band SF Bay Tour - Medium729.70.8223
5-Band SF Bay Tour - Med/High668.50.8975
5-Band SF Bay Tour - High644.70.9307
Chicago-Mac Upwind0.8383
Chicago-Mac All Purpose0.8425
Chicago-Mac Downwind0.8376
Bayview-Mac Cove Island0.6151
Bayview-Mac Shore0.6226
Harvest Moon Regatta554.71.0816
Non Spin/HSFClub 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 L7.595LSM07.197Acc. 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
Non Spin/HSFClub 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
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.