Club
Certificate
2023

Boat

Uro

NOR 5887

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
Beat Angles43.9°41.7°40.2°39.4°39.0°38.8°39.0°
Beat VMG2.953.624.094.414.564.634.65
52°4.565.455.976.306.476.566.61
60°4.945.816.256.466.646.746.82
75°5.346.166.566.766.876.967.13
90°5.456.296.716.977.167.297.46
110°5.166.106.626.947.227.467.91
120°4.825.816.496.887.207.498.07
135°4.285.346.156.657.007.317.91
150°3.654.665.476.056.456.747.23
Run VMG3.174.044.745.245.626.156.82
Gybe Angles145.6°146.6°146.5°147.1°179.3°179.3°179.9°

APH: 630.4

CDL: 7.495

GPH: 707.6

CertNo: 4879

BOAT
ClassMAMBA 341DesignerMAGNUSSON ROLFBuilderMamba Boats ABAge date01/1983Series date01/1980Offset fileS-scan33.offData file4879
HULL
Length Overall10.160 mMaximum Beam3.264 mDraft1.740 mDisplacement4,825 kgDLR8.6937IMS DivisionCruiser/RacerDynamic Allowance0.440%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight520 kgMinimum weight390 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail24.5024.91Headsail Luffed24.9024.90Headsail Flying51.4951.49SymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail6.85Storm Jib9.12Heavy Weather Jib24.61
SAIL LIMITS
Headsails5  Spinnakers0 * No 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.
ORC Ref  03440002R86Issued on 10/08/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Uro

NOR 5887

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
Beat VMG1219.7995.0879.8817.2789.4777.5773.7
52°789.6660.0603.4571.5556.0549.0544.3
60°728.1620.1575.9557.1542.4534.1528.1
75°674.2584.2548.5532.2524.1517.3504.8
90°661.0572.4536.6516.7503.1493.7482.5
110°697.7589.9543.8518.7498.7482.3455.0
120°746.4619.4554.8523.3500.3480.7445.9
135°841.7674.2585.1541.1514.5492.5455.1
150°985.0771.8658.0595.2558.6533.8497.9
Run VMG1137.4891.2759.8687.3640.8585.5528.1
Selected Courses
Windward / Leeward1178.6943.1819.8752.2715.1681.5650.9
All purpose891.4730.2650.3607.5583.6565.4544.4
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward786.60.7628
All purpose630.40.9518
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6717
Downwind "popa"0.8031
70% up, 30% down "Ilhabela"0.7064
30% up, 70% down "Ilhabela-inverso"0.7586
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Predominantly Upwind681.20.8808
Predominantly Downwind642.00.9346
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low810.80.7400
Triple Number All Purpose Medium626.00.9585
Triple Number All Purpose High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Predominantly Upwind681.20.8808
Predominantly Downwind642.00.9346
Predominantly Upwind Low916.00.6550
Predominantly Upwind Medium704.30.8519
Predominantly Upwind High650.60.9223
Predominantly Downwind Low888.90.6750
Predominantly Downwind Medium639.90.9377
Predominantly Downwind High540.91.1093
Chicago-Mac Upwind0.8629
Chicago-Mac All Purpose0.8887
Chicago-Mac Downwind0.9179
Bayview-Mac Cove Island0.8275
Bayview-Mac Shore0.8343
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching591.91.0137
Predominantly Reaching Low725.80.8267
Predominantly Reaching Medium586.61.0229
Predominantly Reaching High521.61.1504
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1160.40.5171
5-Band Low / Medium968.10.6198
5-Band Medium767.30.7819
5-Band Medium / High688.10.8720
5-Band High656.20.9144
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance689.3
Triple Number Coastal/Long Distance Low810.8
Triple Number Coastal/Long Distance Medium626.0
Triple Number Coastal/Long Distance High562.1
Triple Number Windward/Leeward Low1060.8
Triple Number Windward/Leeward Medium781.4
Triple Number Windward/Leeward High678.4
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7400
Triple Number Coastal/Long Distance Medium0.9585
Triple Number Coastal/Long Distance High1.0675
Triple Number Windward/Leeward Low0.5656
Triple Number Windward/Leeward Medium0.7679
Triple Number Windward/Leeward High0.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low810.8
Triple Number Coastal/Long Distance Medium626.0
Triple Number Coastal/Long Distance High562.1
Triple Number Windward/Leeward Low1060.8
Triple Number Windward/Leeward Medium781.4
Triple Number Windward/Leeward High678.4
Predominantly Upwind681.2
Predominantly Downwind642.0
Predominantly Reaching608.8
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7400
Triple Number Coastal/Long Distance Medium0.9585
Triple Number Coastal/Long Distance High1.0675
Triple Number Windward/Leeward Low0.5656
Triple Number Windward/Leeward Medium0.7679
Triple Number Windward/Leeward High0.8844
Coastal/Long Distance0.8704
Predominantly Upwind0.8808
Predominantly Downwind0.9346
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7400
Tretall Distanseseilas Mellomvind0.9585
Tretall Distanseseilas Mye vind1.0675
Tretall Pølsebane Lite vind0.5656
Tretall Pølsebane Mellomvind0.7679
Tretall Pølsebane Mye vind0.8844
Distanseseilas ett tall (OSN 8-16kn)0.8704
Distanseseilas ett tall (APH 6-20kn)0.9518
Enkeltall Motvind0.8808
Enkeltall Medvind0.9346
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Coastal/Long Distance689.30.8704
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind681.20.8808
Predominantly Downwind642.00.9346
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore660.10.9090
Cape Doctor Coastal550.71.0895
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7400
Triple Number Coastal/Long Distance Medium0.9585
Triple Number Coastal/Long Distance High1.0675
Triple Number Windward/Leeward Low0.5656
Triple Number Windward/Leeward Medium0.7679
Triple Number Windward/Leeward High0.8844
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7400
Triple Number Coastal/Long Distance Medium0.9585
Triple Number Coastal/Long Distance High1.0675
Triple Number Windward/Leeward Low0.5656
Triple Number Windward/Leeward Medium0.7679
Triple Number Windward/Leeward High0.8844
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Predominantly Upwind681.20.8808
Predominantly Downwind642.00.9346
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance689.30.8704
Triple Number Coastal/Long Distance Low810.80.7400
Triple Number Coastal/Long Distance Medium626.00.9585
Triple Number Coastal/Long Distance High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1174.4883.7736.0651.3606.6571.2520.0
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low810.80.7400
Triple Number All Purpose Medium626.00.9585
Triple Number All Purpose High562.11.0675
Triple Number Windward/Leeward Low1060.80.5656
Triple Number Windward/Leeward Medium781.40.7679
Triple Number Windward/Leeward High678.40.8844
Predominantly Upwind681.20.8808
Predominantly Downwind642.00.9346
Predominantly Upwind Low916.00.6550
Predominantly Upwind Medium704.30.8519
Predominantly Upwind High650.60.9223
Predominantly Downwind Low888.90.6750
Predominantly Downwind Medium639.90.9377
Predominantly Downwind High540.91.1093
Chicago-Mac Upwind0.8629
Chicago-Mac All Purpose0.8887
Chicago-Mac Downwind0.9179
Bayview-Mac Cove Island0.8275
Bayview-Mac Shore0.8343
Harvest Moon Regatta546.91.0970
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy662.40.9058
San Francisco Bay Medium769.30.7799
Predominantly Reaching591.91.0137
Predominantly Reaching Low725.80.8267
Predominantly Reaching Medium586.61.0229
Predominantly Reaching High521.61.1504
Windward/Leeward 60-40 Low1070.10.5607
Windward/Leeward 60-40 Medium803.40.7468
Windward/Leeward 60-40 High712.70.8419
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1160.40.5171
5-Band Low / Medium968.10.6198
5-Band Medium767.30.7819
5-Band Medium / High688.10.8720
5-Band High656.20.9144
ORC Ref  03440002R86Issued on 10/08/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Uro

NOR 5887

Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMAMBA 341MeasurementHINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA10.160Max. Beam3.264Draft1.740Displacement4,825Wetted area22.47IMS L8.313LSM08.217Acc. length10.160Sink (kg/mm) 15.50
VCGD-0.074VCGM0.001RM Rated (kg·m) 85.5Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0076
EDL0.400ST10.048ST20.170
ST30.170ST40.170ST51.800
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders0Rotating mastNo
P11.850IG13.500ISP13.500MDT10.120MDL10.180MDT20.000MDL20.000TL0.000MW0.000GO0.000
E3.300J4.200BAS1.572FSDFoilSFJ0.000SPL0.000WPLTPS4.200BDMWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.074Flotation Date01/01/2015MeasurerComment
SFFP1.045FFMFF1.238LCFcl5.867SG0.0000
SAFP9.593FAMFA0.930LCFsh6.087HBI1.086
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03440002R86Issued on 10/08/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Uro

NOR 5887

Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment330-2019050915120.230.871.452.242.8024.5009/05/2019
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment645-2022050310430.081.402.464.375.726.3013.30NoYes051.4903/05/2022NorLon 150626-2021012215400.040.460.891.852.904.0012.95NoNo 24.9022/01/2021
ORC Ref  03440002R86Issued on 10/08/2023Valid until 31/03/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org