International
Certificate
2023

Boat

SORONDONGO IV

ESP-8288

RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles42.9°40.6°39.4°38.2°37.2°37.0°37.2°
Beat VMG4.004.895.535.916.096.196.29
52°6.087.237.978.368.548.658.75
60°6.397.518.198.568.778.889.01
75°6.617.698.338.739.009.219.45
90°6.467.598.298.729.069.359.83
110°6.287.648.488.979.369.6310.06
120°6.117.488.378.929.389.8210.51
135°5.486.857.908.579.069.5310.56
150°4.605.876.987.898.539.009.90
Run VMG3.995.086.046.887.568.179.10
Gybe Angles141.5°146.2°150.2°154.1°159.2°171.2°177.2°

APH: 482.3

CDL: 12.799

GPH: 543.5

CertNo: 828803

BOAT
ClassX-50DesignerN. JEPPESENBuilderX YACHTSAge date09/2005Series date04/2005Offset fileX50.OFFData fileE8288
HULL
Length Overall15.220 mMaximum Beam4.294 mDraft3.001 mDisplacement14,103 kgDLR5.8552IMS DivisionCruiser/RacerDynamic Allowance0.180%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.540m
CREW
Maximum weight810 kgMinimum weight608 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail72.6973.86Headsail Luffed59.7159.71Headsail FlyingSymmetric173.30173.30Asymmetric
STORM SAIL AREAS (m²)
Trysail22.31Storm Jib21.11Heavy Weather Jib57.00
SAIL LIMITS
Headsails7  Spinnakers5
STABILITY
Righting Moment446.5 kg·mStability Index141.4
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  03510002RH2Issued on 16/08/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

SORONDONGO IV

ESP-8288

RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG899.9735.5651.1609.6591.5581.5572.5
52°592.4497.8451.7430.8421.4416.3411.3
60°563.1479.3439.6420.5410.5405.2399.5
75°544.7468.0431.9412.6400.0390.9380.8
90°557.0474.3434.2412.7397.6385.0366.1
110°573.1471.2424.7401.3384.5373.9357.9
120°589.0481.1430.0403.7383.9366.5342.5
135°656.9525.5455.8420.0397.3377.7340.9
150°782.4613.5516.0456.1422.1400.2363.5
Run VMG903.4708.4595.8523.5476.0440.8395.8
Selected Courses
Windward / Leeward901.6721.9623.5566.6533.7511.2484.1
All purpose693.8566.3500.0464.0442.8428.2408.4
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward594.01.0101
All purpose482.31.2441
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.9049
Downwind "popa"1.0386
70% up, 30% down "Ilhabela"0.9412
30% up, 70% down "Ilhabela-inverso"0.9945
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Predominantly Upwind517.91.1585
Predominantly Downwind496.01.2098
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low630.10.9523
Triple Number All Purpose Medium479.21.2521
Triple Number All Purpose High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Predominantly Upwind517.91.1585
Predominantly Downwind496.01.2098
Predominantly Upwind Low693.80.8649
Predominantly Upwind Medium530.31.1314
Predominantly Upwind High489.21.2264
Predominantly Downwind Low696.70.8612
Predominantly Downwind Medium494.91.2124
Predominantly Downwind High408.91.4673
Chicago-Mac Upwind1.1374
Chicago-Mac All Purpose1.1587
Chicago-Mac Downwind1.1872
Bayview-Mac Cove Island1.0733
Bayview-Mac Shore1.0881
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching460.31.3035
Predominantly Reaching Low572.21.0485
Predominantly Reaching Medium456.51.3144
Predominantly Reaching High398.91.5042
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low887.80.6758
5-Band Low / Medium739.40.8115
5-Band Medium578.91.0365
5-Band Medium / High515.11.1649
5-Band High488.81.2275
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance525.5
Triple Number Coastal/Long Distance Low630.1
Triple Number Coastal/Long Distance Medium479.2
Triple Number Coastal/Long Distance High424.4
Triple Number Windward/Leeward Low811.8
Triple Number Windward/Leeward Medium590.3
Triple Number Windward/Leeward High506.7
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9523
Triple Number Coastal/Long Distance Medium1.2521
Triple Number Coastal/Long Distance High1.4137
Triple Number Windward/Leeward Low0.7391
Triple Number Windward/Leeward Medium1.0165
Triple Number Windward/Leeward High1.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low630.1
Triple Number Coastal/Long Distance Medium479.2
Triple Number Coastal/Long Distance High424.4
Triple Number Windward/Leeward Low811.8
Triple Number Windward/Leeward Medium590.3
Triple Number Windward/Leeward High506.7
Predominantly Upwind517.9
Predominantly Downwind496.0
Predominantly Reaching473.3
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9523
Triple Number Coastal/Long Distance Medium1.2521
Triple Number Coastal/Long Distance High1.4137
Triple Number Windward/Leeward Low0.7391
Triple Number Windward/Leeward Medium1.0165
Triple Number Windward/Leeward High1.1842
Coastal/Long Distance1.1418
Predominantly Upwind1.1585
Predominantly Downwind1.2098
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.9523
Tretall Distanseseilas Mellomvind1.2521
Tretall Distanseseilas Mye vind1.4137
Tretall Pølsebane Lite vind0.7391
Tretall Pølsebane Mellomvind1.0165
Tretall Pølsebane Mye vind1.1842
Distanseseilas ett tall (OSN 8-16kn)1.1418
Distanseseilas ett tall (APH 6-20kn)1.2441
Enkeltall Motvind1.1585
Enkeltall Medvind1.2098
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Coastal/Long Distance525.51.1418
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind517.91.1585
Predominantly Downwind496.01.2098
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore492.21.2189
Cape Doctor Coastal414.31.4481
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9523
Triple Number Coastal/Long Distance Medium1.2521
Triple Number Coastal/Long Distance High1.4137
Triple Number Windward/Leeward Low0.7391
Triple Number Windward/Leeward Medium1.0165
Triple Number Windward/Leeward High1.1842
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9523
Triple Number Coastal/Long Distance Medium1.2521
Triple Number Coastal/Long Distance High1.4137
Triple Number Windward/Leeward Low0.7391
Triple Number Windward/Leeward Medium1.0165
Triple Number Windward/Leeward High1.1842
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Predominantly Upwind517.91.1585
Predominantly Downwind496.01.2098
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance525.51.1418
Triple Number Coastal/Long Distance Low630.10.9523
Triple Number Coastal/Long Distance Medium479.21.2521
Triple Number Coastal/Long Distance High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance901.8680.0562.9494.7459.4432.5391.9
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low630.10.9523
Triple Number All Purpose Medium479.21.2521
Triple Number All Purpose High424.41.4137
Triple Number Windward/Leeward Low811.80.7391
Triple Number Windward/Leeward Medium590.31.0165
Triple Number Windward/Leeward High506.71.1842
Predominantly Upwind517.91.1585
Predominantly Downwind496.01.2098
Predominantly Upwind Low693.80.8649
Predominantly Upwind Medium530.31.1314
Predominantly Upwind High489.21.2264
Predominantly Downwind Low696.70.8612
Predominantly Downwind Medium494.91.2124
Predominantly Downwind High408.91.4673
Chicago-Mac Upwind1.1374
Chicago-Mac All Purpose1.1587
Chicago-Mac Downwind1.1872
Bayview-Mac Cove Island1.0733
Bayview-Mac Shore1.0881
Harvest Moon Regatta419.81.4291
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy496.01.2097
San Francisco Bay Medium583.11.0290
Predominantly Reaching460.31.3035
Predominantly Reaching Low572.21.0485
Predominantly Reaching Medium456.51.3144
Predominantly Reaching High398.91.5042
Windward/Leeward 60-40 Low813.00.7380
Windward/Leeward 60-40 Medium603.60.9940
Windward/Leeward 60-40 High531.81.1282
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low887.80.6758
5-Band Low / Medium739.40.8115
5-Band Medium578.91.0365
5-Band Medium / High515.11.1649
5-Band High488.81.2275
ORC Ref  03510002RH2Issued on 16/08/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

SORONDONGO IV

ESP-8288

RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassX-50Measurement13/03/2014HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA15.220Max. Beam4.294Draft3.001Displacement14,103Wetted area45.71IMS L13.599LSM013.403Acc. length13.956Sink (kg/mm) 34.36
VCGD-0.190VCGM-0.233RM Rated (kg·m) 446.5Limit of positive stability(°) 132.0Stability Index141.4
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.540PBWPIPA0.0039
EDL3.680ST10.048ST2
ST3ST40.112ST50.295
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders3Rotating mastNo
P18.800IG20.460ISP20.610MDT10.150MDL10.305MDT20.130MDL20.241TL0.910MW0.305GO0.329
E6.780J5.650BAS1.780FSD0.044SFJ0.392SPL5.650WPLTPSBD0.326MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date14/03/2014MeasurerESP 564Comment
SFFP0.350FFM1.703FF1.703LCFcl8.553SG1.0250
SAFP14.588FAM1.312FA1.315LCFsh8.807HBI1.440
W1180.0W2180.0W3180.0W4180.0
PD1474.7PD2476.1PD3486.5PD4500.2
WD15.200PLM9000.00GSA1.0RSA1.0RM445.0
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG001AGUA ACERO143011.00002AGUA ACERO148011.00003AGUA ACERO170010.00004GASOIL ACERO0.9000172209.00005GASOIL ACERO0.90001053510.00Total deductible509.64
Total deductible
ORC Ref  03510002RH2Issued on 16/08/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
Certificate
2023

Boat

SORONDONGO IV

ESP-8288

RFEV
c/ Gamazo sn
39004 Santander – España
crucero@rfev.es
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment0030.181.262.324.125.5472.6927/08/2021
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment0030.110.801.553.024.445.7520.10YesNo 59.7110/08/2023
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC20.1920.1920.1910.3510.10173.30* Copied from legacy *
ORC Ref  03510002RH2Issued on 16/08/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org