International
Certificate
2023

Boat

STRIKING BACK

USA 106

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles42.6°40.6°38.4°37.6°37.2°37.2°37.8°
Beat VMG3.894.755.185.365.455.505.49
52°5.906.957.367.527.617.667.70
60°6.207.167.557.737.837.907.97
75°6.557.327.728.008.178.308.44
90°6.767.577.948.188.428.678.99
110°6.547.538.088.568.979.319.95
120°6.237.438.048.559.049.6010.69
135°5.596.967.768.409.079.8411.62
150°4.735.997.037.728.228.7810.51
Run VMG4.095.196.096.707.127.609.10
Gybe Angles143.3°146.0°149.6°151.2°148.9°146.4°143.5°

APH: 508.8

CDL: 10.120

GPH: 566.4

CertNo: US6547

BOAT
ClassJ 111DesignerJohnstoneBuilderJ CompositesAge date01/2014Series date01/2010Offset fileJ111.OFFData fileUS6547
HULL
Length Overall11.121 mMaximum Beam3.302 mDraft2.185 mDisplacement4,219 kgDLR4.2866IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.422%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.408m
CREW
Maximum weight683 kgMinimum weight512 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail38.1338.99Headsail Luffed33.7033.70Headsail FlyingSymmetricAsymmetric129.63129.63 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail10.65Storm Jib10.84Heavy Weather Jib29.26
SAIL LIMITS
Headsails6  Spinnakers5
STABILITY
Righting Moment100.0 kg·mStability Index117.8
COMMENTS
Cushions on all but v-berths Folding salon table
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  04560002PDWIssued on 29/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

STRIKING BACK

USA 106

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG924.7757.8694.4671.6660.7654.7655.6
52°609.7518.0489.0478.8473.2469.8467.4
60°580.6502.8476.6465.9459.8455.9452.0
75°550.0491.7466.2450.1440.5433.9426.4
90°532.5475.4453.7440.2427.6415.0400.3
110°550.1477.8445.4420.8401.4386.7361.7
120°578.1484.8447.9420.9398.1375.0336.8
135°643.7517.0464.2428.8397.0366.0309.7
150°761.8601.1511.8466.0438.1410.2342.6
Run VMG879.6694.1591.0537.3505.9473.7395.6
Selected Courses
Windward / Leeward902.2726.0642.7604.4583.3564.2525.6
All purpose691.1573.3522.0495.7478.3463.1436.1
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward626.90.9570
All purpose508.81.1794
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8367
Downwind "popa"1.0301
70% up, 30% down "Ilhabela"0.8867
30% up, 70% down "Ilhabela-inverso"0.9633
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Predominantly Upwind551.81.0874
Predominantly Downwind509.41.1780
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low632.20.9491
Triple Number All Purpose Medium506.61.1844
Triple Number All Purpose High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Predominantly Upwind551.81.0874
Predominantly Downwind509.41.1780
Predominantly Upwind Low704.80.8514
Predominantly Upwind Medium574.01.0452
Predominantly Upwind High547.61.0956
Predominantly Downwind Low688.60.8713
Predominantly Downwind Medium506.91.1836
Predominantly Downwind High421.51.4234
Chicago-Mac Upwind1.0693
Chicago-Mac All Purpose1.1102
Chicago-Mac Downwind1.1583
Bayview-Mac Cove Island1.0406
Bayview-Mac Shore1.0457
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching479.71.2507
Predominantly Reaching Low569.11.0543
Predominantly Reaching Medium475.81.2611
Predominantly Reaching High420.71.4263
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low888.60.6752
5-Band Low / Medium748.00.8021
5-Band Medium614.00.9772
5-Band Medium / High564.31.0633
5-Band High532.31.1272
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance552.6
Triple Number Coastal/Long Distance Low632.2
Triple Number Coastal/Long Distance Medium506.6
Triple Number Coastal/Long Distance High456.8
Triple Number Windward/Leeward Low814.1
Triple Number Windward/Leeward Medium622.0
Triple Number Windward/Leeward High554.5
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9491
Triple Number Coastal/Long Distance Medium1.1844
Triple Number Coastal/Long Distance High1.3136
Triple Number Windward/Leeward Low0.7370
Triple Number Windward/Leeward Medium0.9646
Triple Number Windward/Leeward High1.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low632.2
Triple Number Coastal/Long Distance Medium506.6
Triple Number Coastal/Long Distance High456.8
Triple Number Windward/Leeward Low814.1
Triple Number Windward/Leeward Medium622.0
Triple Number Windward/Leeward High554.5
Predominantly Upwind551.8
Predominantly Downwind509.4
Predominantly Reaching489.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9491
Triple Number Coastal/Long Distance Medium1.1844
Triple Number Coastal/Long Distance High1.3136
Triple Number Windward/Leeward Low0.7370
Triple Number Windward/Leeward Medium0.9646
Triple Number Windward/Leeward High1.0820
Coastal/Long Distance1.0858
Predominantly Upwind1.0874
Predominantly Downwind1.1780
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.9491
Tretall Distanseseilas Mellomvind1.1844
Tretall Distanseseilas Mye vind1.3136
Tretall Pølsebane Lite vind0.7370
Tretall Pølsebane Mellomvind0.9646
Tretall Pølsebane Mye vind1.0820
Distanseseilas ett tall (OSN 8-16kn)1.0858
Distanseseilas ett tall (APH 6-20kn)1.1794
Enkeltall Motvind1.0874
Enkeltall Medvind1.1780
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Coastal/Long Distance552.61.0858
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind551.81.0874
Predominantly Downwind509.41.1780
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore537.21.1169
Cape Doctor Coastal444.21.3508
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9491
Triple Number Coastal/Long Distance Medium1.1844
Triple Number Coastal/Long Distance High1.3136
Triple Number Windward/Leeward Low0.7370
Triple Number Windward/Leeward Medium0.9646
Triple Number Windward/Leeward High1.0820
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9491
Triple Number Coastal/Long Distance Medium1.1844
Triple Number Coastal/Long Distance High1.3136
Triple Number Windward/Leeward Low0.7370
Triple Number Windward/Leeward Medium0.9646
Triple Number Windward/Leeward High1.0820
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Predominantly Upwind551.81.0874
Predominantly Downwind509.41.1780
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance552.61.0858
Triple Number Coastal/Long Distance Low632.20.9491
Triple Number Coastal/Long Distance Medium506.61.1844
Triple Number Coastal/Long Distance High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance899.9684.0583.2529.0497.7468.3416.6
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low632.20.9491
Triple Number All Purpose Medium506.61.1844
Triple Number All Purpose High456.81.3136
Triple Number Windward/Leeward Low814.10.7370
Triple Number Windward/Leeward Medium622.00.9646
Triple Number Windward/Leeward High554.51.0820
Predominantly Upwind551.81.0874
Predominantly Downwind509.41.1780
Predominantly Upwind Low704.80.8514
Predominantly Upwind Medium574.01.0452
Predominantly Upwind High547.61.0956
Predominantly Downwind Low688.60.8713
Predominantly Downwind Medium506.91.1836
Predominantly Downwind High421.51.4234
Chicago-Mac Upwind1.0693
Chicago-Mac All Purpose1.1102
Chicago-Mac Downwind1.1583
Bayview-Mac Cove Island1.0406
Bayview-Mac Shore1.0457
Harvest Moon Regatta440.31.3626
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy537.81.1157
San Francisco Bay Medium610.10.9834
Predominantly Reaching479.71.2507
Predominantly Reaching Low569.11.0543
Predominantly Reaching Medium475.81.2611
Predominantly Reaching High420.71.4263
Windward/Leeward 60-40 Low819.50.7322
Windward/Leeward 60-40 Medium643.00.9331
Windward/Leeward 60-40 High589.21.0183
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low888.60.6752
5-Band Low / Medium748.00.8021
5-Band Medium614.00.9772
5-Band Medium / High564.31.0633
5-Band High532.31.1272
ORC Ref  04560002PDWIssued on 29/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

STRIKING BACK

USA 106

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ 111Measurement09/10/2020HINPlan reviewHull constructionCoredCarbon RudderYesLight stanchionsNoTrim tabNo
LOA11.121Max. Beam3.302Draft2.185Displacement4,219Wetted area23.46IMS L10.353LSM09.946Acc. length10.732Sink (kg/mm) 18.08
VCGD-0.013VCGM-0.023RM Rated (kg·m) 100.0Limit of positive stability(°) 118.3Stability Index117.8
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.408PBW0.125PIPA0.0035
EDL2.253ST10.040ST20.180
ST30.180ST40.113ST50.305
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P13.767IG14.641ISP15.683MDT10.110MDL10.175MDT20.095MDL20.134TL1.050MW0.175GO0.198
E4.418J4.230BAS1.711FSD0.035SFJ0.303SPL0.000WPLTPS6.525BD0.170MWT106.00MCG5.080
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodBoom incliningFlotation Date09/10/2020MeasurerComment
SFFP0.994FFM1.247FF1.250LCFcl6.054SG1.0100
SAFP10.966FAM0.892FA0.898LCFsh6.271HBI1.069
W188.7W288.7W388.7W488.7LCFD6.192
PD1291.9PD2292.6PD3292.7PD4294.9
WD4.140PLM9000.00GSA1.0RSA1.0RM98.7
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG3Fuel PVC Aft centerlineFuel50208.470.302Water Bladder Port settee10005.500.201Waste PVC Port side head5003.430.65Total deductible178.470.30
OTHER ITEMSIdKindDescriptionWeightLCGVCG2Battery12V engine battery stbd settee205.530.201Battery12V house battery stbd settee255.310.201EngineVolvo D1-20 18 hpTotal deductible0
ORC Ref  04560002PDWIssued on 29/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

STRIKING BACK

USA 106

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMain 20200.201.061.883.083.8038.1304/06/2020OUK4010699-001
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentJ1-3-200.070.681.292.403.444.4314.45YesNo 33.7012/10/2020OUS139275-002J1-200.100.671.262.343.384.3814.31YesNo 32.8004/06/2020OUK4006746-002
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA2-2018RM18.0514.8116.439.579.06106%129.6322/05/2023OUK4011276 remeasureC0-2316.1314.6815.416.218.2575%84.9622/05/2023OUS153259
ORC Ref  04560002PDWIssued on 29/06/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org