Club
Certificate
2024

Boat

Leona

NOR 11100

Norges Seilforbund
Sognsveien 73
0854 OSLO
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles44.2°42.1°40.7°40.0°39.6°39.1°38.8°39.1°
Beat VMG3.404.154.685.025.205.315.405.40
52°5.246.216.877.247.447.547.657.68
60°5.546.497.107.447.647.767.877.91
75°5.746.697.297.627.848.018.228.33
90°5.816.887.507.838.068.248.478.72
110°5.686.817.497.898.218.509.009.42
120°5.436.567.367.828.168.499.099.64
135°4.846.006.927.527.918.268.929.59
150°4.095.216.136.867.357.698.238.76
Run VMG3.544.515.315.946.366.917.738.28
Gybe Angles143.8°147.4°147.8°148.3°150.2°178.9°179.5°179.7°
APH ToD:556.0CDL: 9.886APH ToT: 1.0792CertNo:8347
BOAT
ClassHanse 411 dyp kjølDesignerJudel/VrolijkBuilderHanse YachtsAge date01/2004Series date01/2001Offset fileha411nd.offData file8347
HULL
Length Overall12.230 mMaximum Beam4.014 mDraft2.088 mDisplacement10,854 kgDLR7.9211IMS DivisionCruiser/RacerDynamic Allowance0.460%Age Allowance0.487%
PROPELLER
InstallationIn ApertureTypeFolding 3 bladesDiameter0.450m
CREW
Maximum weight799 kg(default)Minimum weight669 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail52.7353.72Headsail Luffed40.3640.36Headsail FlyingSymmetricAsymmetric88.1994.41 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail15.71Storm Jib14.97Heavy Weather Jib40.41
SAIL LIMITS
Headsails6  Spinnakers5
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
Certificate
2024

Boat

Leona

NOR 11100

Norges Seilforbund
Sognsveien 73
0854 OSLO
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1057.7868.0769.3717.4692.7678.3666.4667.0
52°686.8579.8524.1497.4483.8477.1470.8468.9
60°649.4554.5506.8483.8471.4464.1457.4455.0
75°627.2537.8494.2472.4459.2449.7437.9432.2
90°620.1523.0480.3459.9446.6437.0425.0412.9
110°633.4528.8480.4456.3438.7423.7399.9382.0
120°663.3548.7489.3460.6441.0424.1396.1373.3
135°743.8599.9520.0478.5454.8436.0403.8375.4
150°880.8690.7587.4524.9489.9468.1437.6410.9
Run VMG1017.0797.6678.3606.1565.6520.6465.6435.0
Selected Courses
Windward / Leeward1037.4832.8723.8661.7629.1599.5566.0551.0
All purpose793.1649.4574.9534.9512.9495.8474.8461.6
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward692.50.8664
All purpose556.01.0792
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7707
Downwind "popa"0.9031
70% up, 30% down "Ilhabela"0.8061
30% up, 70% down "Ilhabela-inverso"0.8588
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Predominantly Upwind598.91.0019
Predominantly Downwind568.71.0550
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low721.30.8318
Triple Number AP Medium552.31.0863
Triple Number AP High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Single Number Predominant Upwind597.81.0036
Single Number Predominant Reaching528.71.1349
Single Number Predominant Downwind569.21.0541
Predominant Upwind - Low795.30.7545
Predominant Upwind - Low/Med661.10.9076
Predominant Upwind - Medium578.51.0371
Predominant Upwind - Med/High537.11.1172
Predominant Upwind - High520.11.1536
Predominant Downwind Low795.10.7547
Predominant Downwind Low/Med644.60.9308
Predominant Downwind Medium548.11.0947
Predominant Downwind Med/High490.11.2242
Predominant Downwind High457.01.3130
Predominant Reaching Low704.20.8521
Predominant Reaching Low/Med585.31.0252
Predominant Reaching Medium512.11.1717
Predominant Reaching Med/High472.01.2713
Predominant Reaching High450.71.3313
SA/DSPL Upwind18.84SA/DSPL Downwind28.52
Scoring OptionTODTOT
5-Band Windward/Leeward Low991.00.6055
5-Band Windward/Leeward Low/Med799.30.7507
5-Band Windward/Leeward Medium675.80.8879
5-Band Windward/Leeward Med/High604.20.9931
5-Band Windward/Leeward High569.21.0541
Windward/Leeward 60-40 Low995.70.6026
Windward/Leeward 60-40 Low/Med807.20.7433
Windward/Leeward 60-40 Medium686.90.8735
Windward/Leeward 60-40 Med/High619.70.9682
Windward/Leeward 60-40 High589.11.0185
5-Band AP Low760.50.7889
5-Band AP Low/Med627.40.9563
5-Band AP Medium544.21.1026
5-Band AP Med/High498.51.2037
5-Band AP High476.21.2601
5-Band SF Bay Tour - Low941.00.6376
5-Band SF Bay Tour - Low/Med763.00.7863
5-Band SF Bay Tour - Medium649.50.9238
5-Band SF Bay Tour - Med/High586.61.0228
5-Band SF Bay Tour - High557.31.0766
Chicago-Mac Upwind0.9825
Chicago-Mac All Purpose1.0070
Chicago-Mac Downwind1.0359
Bayview-Mac Cove Island0.9349
Bayview-Mac Shore0.9452
Harvest Moon Regatta482.61.2433
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance607.1
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0864
Triple Number Coastal/Long Distance High1.2190
Triple Number Windward/Leeward Low0.6416
Triple Number Windward/Leeward Medium0.8714
Triple Number Windward/Leeward High1.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low721.3
Triple Number Coastal/Long Distance Medium552.3
Triple Number Coastal/Long Distance High492.2
Triple Number Windward/Leeward Low935.2
Triple Number Windward/Leeward Medium688.5
Triple Number Windward/Leeward High594.4
Predominantly Upwind598.9
Predominantly Downwind568.7
Predominantly Reaching539.9
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0864
Triple Number Coastal/Long Distance High1.2190
Triple Number Windward/Leeward Low0.6416
Triple Number Windward/Leeward Medium0.8714
Triple Number Windward/Leeward High1.0095
Coastal/Long Distance0.9884
Predominantly Upwind1.0019
Predominantly Downwind1.0550
For information
General Purpose Handicap (GPH)625.4
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8318
Tretall Distanseseilas Mellomvind1.0864
Tretall Distanseseilas Mye vind1.2190
Tretall Pølsebane Lite vind0.6416
Tretall Pølsebane Mellomvind0.8714
Tretall Pølsebane Mye vind1.0095
Distanseseilas ett tall1.0792
Enkeltall Motvind1.0019
Enkeltall Medvind1.0550
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Coastal/Long Distance607.10.9884
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind598.91.0019
Predominantly Downwind568.71.0550
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore555.51.0801
Cape Doctor Coastal465.51.2888
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0864
Triple Number Coastal/Long Distance High1.2190
Triple Number Windward/Leeward Low0.6416
Triple Number Windward/Leeward Medium0.8714
Triple Number Windward/Leeward High1.0095
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8318
Triple Number Coastal/Long Distance Medium1.0864
Triple Number Coastal/Long Distance High1.2190
Triple Number Windward/Leeward Low0.6416
Triple Number Windward/Leeward Medium0.8714
Triple Number Windward/Leeward High1.0095
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Predominantly Upwind598.91.0019
Predominantly Downwind568.71.0550
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance607.10.9884
Triple Number Coastal/Long Distance Low721.30.8318
Triple Number Coastal/Long Distance Medium552.31.0864
Triple Number Coastal/Long Distance High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1035.4782.1650.2572.5532.8501.1455.3440.9
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low721.30.8318
Triple Number AP Medium552.31.0863
Triple Number AP High492.21.2190
Triple Number Windward/Leeward Low935.20.6416
Triple Number Windward/Leeward Medium688.50.8714
Triple Number Windward/Leeward High594.41.0095
Single Number Predominant Upwind597.81.0036
Single Number Predominant Reaching528.71.1349
Single Number Predominant Downwind569.21.0541
Predominant Upwind - Low795.30.7545
Predominant Upwind - Low/Med661.10.9076
Predominant Upwind - Medium578.51.0371
Predominant Upwind - Med/High537.11.1172
Predominant Upwind - High520.11.1536
Predominant Downwind Low795.10.7547
Predominant Downwind Low/Med644.60.9308
Predominant Downwind Medium548.11.0947
Predominant Downwind Med/High490.11.2242
Predominant Downwind High457.01.3130
Predominant Reaching Low704.20.8521
Predominant Reaching Low/Med585.31.0252
Predominant Reaching Medium512.11.1717
Predominant Reaching Med/High472.01.2713
Predominant Reaching High450.71.3313
SA/DSPL Upwind18.84SA/DSPL Downwind28.52
Scoring OptionTODTOT
5-Band Windward/Leeward Low991.00.6055
5-Band Windward/Leeward Low/Med799.30.7507
5-Band Windward/Leeward Medium675.80.8879
5-Band Windward/Leeward Med/High604.20.9931
5-Band Windward/Leeward High569.21.0541
Windward/Leeward 60-40 Low995.70.6026
Windward/Leeward 60-40 Low/Med807.20.7433
Windward/Leeward 60-40 Medium686.90.8735
Windward/Leeward 60-40 Med/High619.70.9682
Windward/Leeward 60-40 High589.11.0185
5-Band AP Low760.50.7889
5-Band AP Low/Med627.40.9563
5-Band AP Medium544.21.1026
5-Band AP Med/High498.51.2037
5-Band AP High476.21.2601
5-Band SF Bay Tour - Low941.00.6376
5-Band SF Bay Tour - Low/Med763.00.7863
5-Band SF Bay Tour - Medium649.50.9238
5-Band SF Bay Tour - Med/High586.61.0228
5-Band SF Bay Tour - High557.31.0766
Chicago-Mac Upwind0.9825
Chicago-Mac All Purpose1.0070
Chicago-Mac Downwind1.0359
Bayview-Mac Cove Island0.9349
Bayview-Mac Shore0.9452
Harvest Moon Regatta482.61.2433

Club
Certificate
2024

Boat

Leona

NOR 11100

Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassHanse 411 dyp kjølMeasurementHINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA12.230Max. Beam4.014Draft2.088Displacement10,854Wetted area35.09IMS L11.105LSM011.106Acc. length12.230Sink (kg/mm) 26.68
VCGD0.100VCGM0.089RM Rated (kg·m) 238.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight799Declared crew weightN/A
PROPELLER
Propeller TypeFolding 3 blades
InstallationIn ApertureTwin screwNoHydro generatorNo
PRD0.450PBWPIPA0.0098
APH0.000APT0.000APB0.000
RIG
Forestay tensionForwardInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunners/Checkstays0Spreaders2Rotating mastNo
P16.000IG17.300ISP17.320MDT10.120MDL10.230MDT20.000MDL20.000TL0.835MW0.000GO0.000
E5.610J4.620BAS1.770FSDFoilSFJ0.210SPL0.000WPLTPS5.050BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.100Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible

Club
Certificate
2024

Boat

Leona

NOR 11100

Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment391-2019040717280.161.112.073.544.6952.7307/04/2019Målt av målernummer 417. Kun registrert da jeg ikkesant dette i den nye databasen.
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment623-2019050219200.040.621.232.453.684.8916.45YesNo 40.3602/05/2019Flex Spectra391-2019040718100.080.001.102.062.993.8516.38YesNo 32.9907/04/2019
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment391-20190407183216.9314.3815.666.428.1279%88.1907/04/2019
CRUISER/RACER REQUIREMENTS*
Accommodation length12.2 mTable area0.55 m²Headroom1.82 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity155 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity94 l
*This list refers to the calculated requirements. See IMS Appendix 1 for the complete list of requirements.