International
One Design
 Certificate
2024

Boat

ESSE 850 OD

MNA-1234

Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles42.3°39.6°39.0°39.6°39.9°40.0°41.2°43.5°
Beat VMG3.854.424.604.684.714.734.674.46
52°5.806.446.646.746.826.876.886.74
60°6.076.686.897.037.147.227.277.17
75°6.246.937.287.517.697.837.998.03
90°6.146.917.537.948.258.538.939.22
110°6.177.027.507.948.519.2110.1610.83
120°6.057.057.778.328.889.4310.4811.53
135°5.466.647.538.569.6410.4912.0313.63
150°4.605.816.717.508.479.6412.7515.62
Run VMG3.985.035.826.497.348.3411.0513.64
Gybe Angles142.8°146.9°151.2°148.9°145.8°144.7°147.4°151.2°
APH ToD:542.3CDL: 7.690APH ToT: 1.1065CertNo:S850
BOAT
ClassESSE 850DesignerFELCIBuilderPROTEUS YACHTSAge date06/2004Series date06/2004Offset files850.od.OFFData fileS850
HULL
Length Overall8.500 mMaximum Beam2.190 mDraft1.999 mDisplacement1,222 kgDLR3.0975IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight300 kg(declared)Minimum weight170 kg * when appliedNon Manual PowerNoCrew Arm ExtensionLoose or no lifelines
SAIL AREAS (m²)
MeasuredRatedMainsail27.1228.06Headsail Luffed17.4417.44Headsail FlyingSymmetricAsymmetric72.2872.28 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail6.71Storm Jib5.14Heavy Weather Jib13.87
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment34.7 kg·mStability Index121.6
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.
ORC Ref  02920002U36Issued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org

International
One Design
 Certificate
2024

Boat

ESSE 850 OD

MNA-1234

Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG935.9814.1782.2769.7764.3760.8770.6808.0
52°620.7559.1542.4533.7528.2524.0523.1534.1
60°593.4539.0522.4511.9504.4498.7495.0502.1
75°577.3519.7494.6479.5468.2459.5450.8448.6
90°586.3521.2478.2453.4436.3422.2403.0390.4
110°583.4512.6479.8453.5423.0390.9354.2332.3
120°595.5510.4463.4432.8405.6381.8343.5312.2
135°659.9541.8477.8420.8373.4343.2299.4264.1
150°783.2619.2536.7480.0425.0373.6282.3230.5
Run VMG904.3715.0619.0554.3490.7431.4325.9264.0
Selected Courses
Windward / Leeward920.1764.6700.6662.0627.5596.1548.3536.0
All purpose712.9608.6563.2533.7508.1486.0455.5445.1
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward673.70.8906
All purpose542.31.1065
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7503
Downwind "popa"1.0394
70% up, 30% down "Ilhabela"0.8186
30% up, 70% down "Ilhabela-inverso"0.9317
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Predominantly Upwind601.20.9980
Predominantly Downwind525.81.1410
Custom scoring options for Canada
Scoring OptionTODTOT
Predominant Upwind598.91.0018
Predominant Reaching509.31.1781
Predominant Downwind509.31.1781
Predominant Upwind - Low721.20.8320
Predominant Upwind - Low/Med638.20.9402
Predominant Upwind - Medium589.81.0173
Predominant Upwind - Med/High559.61.0722
Predominant Upwind - High547.11.0968
Predominant Reaching Low645.20.9299
Predominant Reaching Low/Med557.91.0755
Predominant Reaching Medium496.11.2095
Predominant Reaching Med/High448.81.3369
Predominant Reaching High421.01.4250
Predominant Downwind Low645.20.9299
Predominant Downwind Low/Med598.11.0032
Predominant Downwind Medium512.71.1703
Predominant Downwind Med/High439.51.3652
Predominant Downwind High389.41.5408
Harvest Moon Regatta448.61.3375
Chicago-Mac Upwind0.9814
Chicago-Mac All Purpose1.0448
Chicago-Mac Downwind1.1174
Bayview-Mac Cove Island0.9875
Bayview-Mac Shore0.9877
Scoring OptionTODTOT
5-Band Windward/Leeward Low884.80.6781
5-Band Windward/Leeward Low/Med749.80.8002
5-Band Windward/Leeward Medium665.60.9014
5-Band Windward/Leeward Med/High598.91.0018
5-Band Windward/Leeward High554.41.0822
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Windward/Leeward 60-40 Low889.50.6745
Windward/Leeward 60-40 Low/Med762.70.7867
Windward/Leeward 60-40 Medium687.20.8730
Windward/Leeward 60-40 Med/High631.90.9495
Windward/Leeward 60-40 High598.61.0023
5-Band AP Low689.20.8705
5-Band AP Low/Med596.91.0052
5-Band AP Medium536.51.1183
5-Band AP Med/High488.71.2278
5-Band AP High459.01.3073
Triple Number AP Low660.80.9080
Triple Number AP Medium543.41.1041
Triple Number AP High480.11.2497
5-Band SF Bay Tour - Low841.00.7134
5-Band SF Bay Tour - Low/Med718.40.8352
5-Band SF Bay Tour - Medium642.40.9340
5-Band SF Bay Tour - Med/High584.61.0264
5-Band SF Bay Tour - High548.91.0932
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance589.5
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9080
Triple Number Coastal/Long Distance Medium1.1042
Triple Number Coastal/Long Distance High1.2497
Triple Number Windward/Leeward Low0.7123
Triple Number Windward/Leeward Medium0.8892
Triple Number Windward/Leeward High1.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low660.8
Triple Number Coastal/Long Distance Medium543.4
Triple Number Coastal/Long Distance High480.1
Triple Number Windward/Leeward Low842.3
Triple Number Windward/Leeward Medium674.8
Triple Number Windward/Leeward High586.0
Predominantly Upwind601.2
Predominantly Downwind525.8
Predominantly Reaching509.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9080
Triple Number Coastal/Long Distance Medium1.1042
Triple Number Coastal/Long Distance High1.2497
Triple Number Windward/Leeward Low0.7123
Triple Number Windward/Leeward Medium0.8892
Triple Number Windward/Leeward High1.0239
Coastal/Long Distance1.0177
Predominantly Upwind0.9980
Predominantly Downwind1.1410
For information
General Purpose Handicap (GPH)600.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.9080
Tretall Distanseseilas Mellomvind1.1042
Tretall Distanseseilas Mye vind1.2497
Tretall Pølsebane Lite vind0.7123
Tretall Pølsebane Mellomvind0.8892
Tretall Pølsebane Mye vind1.0239
Distanseseilas ett tall (OSN 8-16kn)1.0177
Distanseseilas ett tall (APH 6-20kn)1.1065
Enkeltall Motvind0.9980
Enkeltall Medvind1.1410
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Coastal/Long Distance589.51.0177
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind601.20.9980
Predominantly Downwind525.81.1410
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore539.71.1118
Cape Doctor Coastal448.21.3386
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9080
Triple Number Coastal/Long Distance Medium1.1042
Triple Number Coastal/Long Distance High1.2497
Triple Number Windward/Leeward Low0.7123
Triple Number Windward/Leeward Medium0.8892
Triple Number Windward/Leeward High1.0239
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9080
Triple Number Coastal/Long Distance Medium1.1042
Triple Number Coastal/Long Distance High1.2497
Triple Number Windward/Leeward Low0.7123
Triple Number Windward/Leeward Medium0.8892
Triple Number Windward/Leeward High1.0239
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Predominantly Upwind601.20.9980
Predominantly Downwind525.81.1410
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance589.51.0177
Triple Number Coastal/Long Distance Low660.80.9080
Triple Number Coastal/Long Distance Medium543.41.1042
Triple Number Coastal/Long Distance High480.11.2497
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance918.5721.2632.1573.1530.0490.8428.1411.9
Custom scoring options for United States of America
Scoring OptionTODTOT
Predominant Upwind598.91.0018
Predominant Reaching509.31.1781
Predominant Downwind509.31.1781
Predominant Upwind - Low721.20.8320
Predominant Upwind - Low/Med638.20.9402
Predominant Upwind - Medium589.81.0173
Predominant Upwind - Med/High559.61.0722
Predominant Upwind - High547.11.0968
Predominant Reaching Low645.20.9299
Predominant Reaching Low/Med557.91.0755
Predominant Reaching Medium496.11.2095
Predominant Reaching Med/High448.81.3369
Predominant Reaching High421.01.4250
Predominant Downwind Low645.20.9299
Predominant Downwind Low/Med598.11.0032
Predominant Downwind Medium512.71.1703
Predominant Downwind Med/High439.51.3652
Predominant Downwind High389.41.5408
Harvest Moon Regatta448.61.3375
Chicago-Mac Upwind0.9814
Chicago-Mac All Purpose1.0448
Chicago-Mac Downwind1.1174
Bayview-Mac Cove Island0.9875
Bayview-Mac Shore0.9877
Scoring OptionTODTOT
5-Band Windward/Leeward Low884.80.6781
5-Band Windward/Leeward Low/Med749.80.8002
5-Band Windward/Leeward Medium665.60.9014
5-Band Windward/Leeward Med/High598.91.0018
5-Band Windward/Leeward High554.41.0822
Triple Number Windward/Leeward Low842.30.7123
Triple Number Windward/Leeward Medium674.80.8892
Triple Number Windward/Leeward High586.01.0239
Windward/Leeward 60-40 Low889.50.6745
Windward/Leeward 60-40 Low/Med762.70.7867
Windward/Leeward 60-40 Medium687.20.8730
Windward/Leeward 60-40 Med/High631.90.9495
Windward/Leeward 60-40 High598.61.0023
5-Band AP Low689.20.8705
5-Band AP Low/Med596.91.0052
5-Band AP Medium536.51.1183
5-Band AP Med/High488.71.2278
5-Band AP High459.01.3073
Triple Number AP Low660.80.9080
Triple Number AP Medium543.41.1041
Triple Number AP High480.11.2497
5-Band SF Bay Tour - Low841.00.7134
5-Band SF Bay Tour - Low/Med718.40.8352
5-Band SF Bay Tour - Medium642.40.9340
5-Band SF Bay Tour - Med/High584.61.0264
5-Band SF Bay Tour - High548.91.0932
ORC Ref  02920002U36Issued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org

International
One Design
 Certificate
2024

Boat

ESSE 850 OD

MNA-1234

Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassESSE 850Measurement17/03/2004HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA8.500Max. Beam2.190Draft1.999Displacement1,222Wetted area12.99IMS L7.853LSM07.334Acc. length7.117Sink (kg/mm) 9.82
VCGD-0.279VCGM-0.272RM Rated (kg·m) 34.7Limit of positive stability(°) 125.6Stability Index121.6Default crew weight442Declared crew weight300
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunners/Checkstays0Spreaders2Rotating mastNo
P10.500IG10.000ISP11.500MDT10.082MDL10.124MDT20.070MDL20.090TL1.140MW0.124GO0.165
E3.650J3.070BAS1.156FSDSFJ0.260SPL0.000WPLTPS4.920BD0.136MWT57.00MCG4.260
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date08/07/2004
SFFP0.060FFM0.813FF0.825LCFcl4.481SG1.0000
SAFP8.000FAM0.717FA0.725LCFsh4.603HBI0.756
W136.8W236.8W336.8W436.8
PD1628.3PD2629.9PD3620.9PD4622.0
WD7.910PLM9000.00GSA1.0RSA1.0RM36.7
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  02920002U36Issued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org

International
One Design
 Certificate
2024

Boat

ESSE 850 OD

MNA-1234

MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM11.061.402.002.803.2427.12Class
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJ10.063.4010.10NoNo 17.44Class
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentASP113.2511.2512.257.007.4095%72.28Class
ORC Ref  02920002U36Issued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org