Club Certificate2025
Minnie The MoocherHKG201
ORC
Central Rating Office
Issuing certificates for
HONG KONG
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 Angles42.3°42.3°39.7°37.5°36.7°36.0°35.6°35.4°36.7°
Beat VMG3.074.215.055.515.735.865.956.045.95
52°4.806.347.307.727.948.088.198.338.35
60°5.136.657.507.928.188.368.498.678.74
75°5.366.857.638.098.478.778.989.309.48
90°5.196.727.588.088.558.999.3710.0110.49
110°5.176.807.838.498.969.389.7910.6011.51
120°5.006.677.808.529.209.8210.3711.4712.63
135°4.286.027.398.148.879.7010.7013.0515.02
150°3.565.046.327.358.078.719.4411.7015.28
Run VMG3.084.375.476.367.037.558.1810.1413.23
Gybe Angles141.8°141.8°145.1°150.2°153.4°151.2°147.6°144.3°147.1°
APH ToD:479.7CDL: 11.073APH ToT: 1.2508CertNo:
BOAT
ClassKer 11.3DesignerJason KerBuilderVision YachtsAge date06/2001Series date01/2001Offset fileKER113.offData fileHKG201
HULL
Length Overall11.442 mMaximum Beam3.680 mDraft2.389 mDisplacement4,442 kgDLR3.7706IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight744 kg(default)Minimum weight614 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail49.1050.18Headsail Luffed36.8836.88Headsail FlyingSymmetricAsymmetric153.21153.21 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail14.22Storm Jib12.67Heavy Weather Jib34.20
SAIL LIMITS
Headsails6Spinnakers5
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
Minnie The MoocherHKG201
ORC
Central Rating Office
Issuing certificates for
HONG KONG
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 VMG1173.8855.5712.4653.8628.8614.5605.2596.2604.7
52°750.6567.8492.9466.1453.6445.6439.7432.1430.9
60°702.1541.8479.8454.8440.0430.8424.0415.1412.1
75°671.9525.8471.9445.0424.9410.4400.9386.9379.6
90°693.6536.0474.7445.3421.0400.6384.0359.5343.2
110°696.2529.6459.8424.3401.6383.7367.6339.6312.8
120°720.4539.9461.8422.7391.2366.5347.3313.9285.0
135°841.4598.0487.3442.5406.0371.0336.4275.9239.7
150°1011.4714.0569.6490.0445.9413.1381.2307.6235.7
Run VMG1168.8824.5657.7565.7511.9476.7440.2355.1272.1
Selected Courses
Windward / Leeward1170.9840.0685.1609.8570.3545.6522.7475.7438.4
All purpose882.7650.1545.9497.3468.8448.2430.1397.1373.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward588.71.0192
All purpose479.71.2508
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.9001
Downwind "popa"1.0961
70% up, 30% down "Ilhabela"0.9511
30% up, 70% down "Ilhabela-inverso"1.0289
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Predominantly Upwind520.71.1524
Predominantly Downwind481.81.2454
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low598.01.0034
Triple Number AP Medium479.61.2510
Triple Number AP High422.31.4209
Triple Number Windward/Leeward Low795.90.7539
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Single Number Predominant Upwind537.81.1158
Single Number Predominant Reaching472.21.2706
Single Number Predominant Downwind498.11.2047
Predominant Upwind - Low712.90.8416
Predominant Upwind - Low/Med562.71.0663
Predominant Upwind - Medium508.51.1800
Predominant Upwind - Med/High474.21.2653
Predominant Upwind - High452.41.3262
Predominant Downwind Low714.00.8403
Predominant Downwind Low/Med542.41.1061
Predominant Downwind Medium469.71.2774
Predominant Downwind Med/High410.01.4635
Predominant Downwind High358.71.6726
Predominant Reaching Low638.10.9403
Predominant Reaching Low/Med504.41.1896
Predominant Reaching Medium449.51.3349
Predominant Reaching Med/High404.21.4845
Predominant Reaching High369.91.6219
SA/DSPL Upwind31.67SA/DSPL Downwind74.50
Scoring OptionTODTOT
5-Band Windward/Leeward Low884.10.6787
5-Band Windward/Leeward Low/Med664.40.9031
5-Band Windward/Leeward Medium578.31.0375
5-Band Windward/Leeward Med/High522.61.1481
5-Band Windward/Leeward High477.31.2569
Windward/Leeward 60-40 Low887.10.6764
Windward/Leeward 60-40 Low/Med671.60.8934
Windward/Leeward 60-40 Medium589.71.0174
Windward/Leeward 60-40 Med/High539.51.1121
Windward/Leeward 60-40 High501.71.1959
5-Band AP Low654.10.9173
5-Band AP Low/Med532.71.1263
5-Band AP Medium473.31.2678
5-Band AP Med/High430.91.3926
5-Band AP High398.61.5051
5-Band SF Bay Tour - Low764.20.7851
5-Band SF Bay Tour - Low/Med635.30.9445
5-Band SF Bay Tour - Medium556.71.0778
5-Band SF Bay Tour - Med/High505.31.1875
5-Band SF Bay Tour - High465.61.2887
Chicago-Mac Upwind1.0846
Chicago-Mac All Purpose1.1231
Chicago-Mac Downwind1.1580
Bayview-Mac Cove Island0.8414
Bayview-Mac Shore0.8470
Harvest Moon Regatta412.11.4560
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance519.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.1541
Triple Number Coastal/Long Distance Low1.0034
Triple Number Coastal/Long Distance Medium1.2511
Triple Number Coastal/Long Distance High1.4209
Triple Number Windward/Leeward Low0.7869
Triple Number Windward/Leeward Medium1.0224
Triple Number Windward/Leeward High1.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
For information
General Purpose Handicap (GPH)534.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low598.0
Triple Number Coastal/Long Distance Medium479.6
Triple Number Coastal/Long Distance High422.3
Triple Number Windward/Leeward Low762.5
Triple Number Windward/Leeward Medium586.9
Triple Number Windward/Leeward High510.8
Predominantly Upwind520.7
Predominantly Downwind481.8
Predominantly Reaching464.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low1.0034
Triple Number Coastal/Long Distance Medium1.2511
Triple Number Coastal/Long Distance High1.4209
Triple Number Windward/Leeward Low0.7869
Triple Number Windward/Leeward Medium1.0224
Triple Number Windward/Leeward High1.1747
Coastal/Long Distance1.1541
Predominantly Upwind1.1524
Predominantly Downwind1.2454
For information
General Purpose Handicap (GPH)534.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.2508
Distanseseilas Trippeltall svak vind1.0034
Distanseseilas Trippeltall mellomvind1.2511
Distanseseilas Trippeltall sterk vind1.4209
Pølsebane Trippeltall svak vind0.7869
Pølsebane Trippeltall mellomvind1.0224
Pølsebane Trippeltall sterk vind1.1747
Motvind Singeltall1.1524
Medvind Singeltall1.2454
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Coastal/Long Distance519.91.1541
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind520.71.1524
Predominantly Downwind481.81.2454
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore449.61.3346
Cape Doctor Coastal380.21.5780
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low1.0034
Triple Number Coastal/Long Distance Medium1.2511
Triple Number Coastal/Long Distance High1.4209
Triple Number Windward/Leeward Low0.7869
Triple Number Windward/Leeward Medium1.0224
Triple Number Windward/Leeward High1.1747
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low1.0034
Triple Number Coastal/Long Distance Medium1.2511
Triple Number Coastal/Long Distance High1.4209
Triple Number Windward/Leeward Low0.7869
Triple Number Windward/Leeward Medium1.0224
Triple Number Windward/Leeward High1.1747
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Predominantly Upwind520.71.1524
Predominantly Downwind481.81.2454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance519.91.1541
Triple Number Coastal/Long Distance Low598.01.0034
Triple Number Coastal/Long Distance Medium479.61.2511
Triple Number Coastal/Long Distance High422.31.4209
Triple Number Windward/Leeward Low762.50.7869
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1237.1838.4647.3554.5499.1464.8434.1380.1354.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low598.01.0034
Triple Number AP Medium479.61.2510
Triple Number AP High422.31.4209
Triple Number Windward/Leeward Low795.90.7539
Triple Number Windward/Leeward Medium586.91.0224
Triple Number Windward/Leeward High510.81.1747
Single Number Predominant Upwind537.81.1158
Single Number Predominant Reaching472.21.2706
Single Number Predominant Downwind498.11.2047
Predominant Upwind - Low712.90.8416
Predominant Upwind - Low/Med562.71.0663
Predominant Upwind - Medium508.51.1800
Predominant Upwind - Med/High474.21.2653
Predominant Upwind - High452.41.3262
Predominant Downwind Low714.00.8403
Predominant Downwind Low/Med542.41.1061
Predominant Downwind Medium469.71.2774
Predominant Downwind Med/High410.01.4635
Predominant Downwind High358.71.6726
Predominant Reaching Low638.10.9403
Predominant Reaching Low/Med504.41.1896
Predominant Reaching Medium449.51.3349
Predominant Reaching Med/High404.21.4845
Predominant Reaching High369.91.6219
SA/DSPL Upwind31.67SA/DSPL Downwind74.50
Scoring OptionTODTOT
5-Band Windward/Leeward Low884.10.6787
5-Band Windward/Leeward Low/Med664.40.9031
5-Band Windward/Leeward Medium578.31.0375
5-Band Windward/Leeward Med/High522.61.1481
5-Band Windward/Leeward High477.31.2569
Windward/Leeward 60-40 Low887.10.6764
Windward/Leeward 60-40 Low/Med671.60.8934
Windward/Leeward 60-40 Medium589.71.0174
Windward/Leeward 60-40 Med/High539.51.1121
Windward/Leeward 60-40 High501.71.1959
5-Band AP Low654.10.9173
5-Band AP Low/Med532.71.1263
5-Band AP Medium473.31.2678
5-Band AP Med/High430.91.3926
5-Band AP High398.61.5051
5-Band SF Bay Tour - Low764.20.7851
5-Band SF Bay Tour - Low/Med635.30.9445
5-Band SF Bay Tour - Medium556.71.0778
5-Band SF Bay Tour - Med/High505.31.1875
5-Band SF Bay Tour - High465.61.2887
Chicago-Mac Upwind1.0846
Chicago-Mac All Purpose1.1231
Chicago-Mac Downwind1.1580
Bayview-Mac Cove Island0.8414
Bayview-Mac Shore0.8470
Harvest Moon Regatta412.11.4560
Club Certificate2025
Minnie The MoocherHKG201
ORC
Central Rating Office
Issuing certificates for
HONG KONG
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassKer 11.3Measurement04/06/2015HINPlan reviewHull constructionCoredCarbon rudderYesLight stanchionsNoTrim tabNo
LOA11.442Max. Beam3.680Draft2.389Displacement4,442Wetted area24.63IMS L10.866LSM010.560Acc. length11.442Sink (kg/mm) 17.54
VCGD-0.860VCGM-0.814RM Rated (kg·m) 139.4Limit of positive stability(°) N/AStability IndexN/ADefault crew weight744Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.380PBW0.095PIPA0.0031
PSD0.026PHD0.053PHL0.140
PSA0.2°ESL1.220
ST10.011ST20.080ST30.095
ST40.060ST50.280
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P15.300IG15.880ISP17.200MDT10.111MDL10.212MDT20.086MDL20.147TL1.320MW0.212GO0.222
E5.310J4.480BAS1.710FSD0.033SFJ0.000SPLWPLTPS6.480BD0.272MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.860Flotation Date04/06/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
Minnie The MoocherHKG201
ORC
Central Rating Office
Issuing certificates for
HONG KONG
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.151.172.083.464.5449.10IRC
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment10.100.641.202.323.464.6215.82YesNo 36.88IRC
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment119.6516.4018.0310.2510.00102%153.21IRC