Club Certificate2026
JACOBIGBR-5379T
Hellenic Sailing Federation
Offshore Committee
Επιτροπή Ανοικτής Θαλάσσης
Ελληνικής Ιστιοπλοϊκής Ομοσπονδίας
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 Angles46.5°44.1°42.0°40.8°40.6°40.4°40.3°40.5°41.6°
Beat VMG1.752.553.103.493.783.974.064.114.04
52°2.773.904.635.165.545.785.885.965.95
60°2.984.124.845.375.745.966.076.166.18
75°3.114.255.005.565.936.156.296.436.50
90°3.084.325.215.836.176.336.436.616.78
110°3.154.415.305.936.296.536.747.077.34
120°3.024.265.175.856.266.516.757.227.53
135°2.673.864.785.516.046.366.617.137.56
150°2.243.314.224.965.586.056.346.827.32
Run VMG1.942.873.654.324.925.465.926.476.93
Gybe Angles142.4°145.7°150.1°154.7°160.6°171.8°177.2°179.0°179.0°
APH ToD:711.3CDL: 6.001APH ToT: 0.8436CertNo:02071
BOAT
ClassTWISTER 28DesignerKIM HOLMANBuilderTYLERAge date03/1980Series date01/1964Offset fileTW28.offData fileGBR5379T
HULL
Length Overall8.610 mMaximum Beam2.460 mDraft1.526 mDisplacement4,521 kgDLR13.6479IMS DivisionCruiser/RacerDynamic Allowance0.720%Age Allowance0.650%RS Assessment0.000%
PROPELLER
InstallationIn ApertureTypeSolid 3 bladesDiameter0.340m
CREW
Maximum weight240 kg(declared)Minimum weight130 kg ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail15.5715.79Headsail Luffed23.1823.18Headsail FlyingSymmetricAsymmetric38.9945.78 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS Maximum (m²)
Trysail4.93Storm Jib5.41Heavy Weather Jib14.61
SAIL LIMITS
Headsails5
✱ One set on the forestay
✱ Woven polyester sails
Spinnakers4
✱ Asymmetric may be tacked on the pole
STABILITY
Righting Moment 49.7 kg·m Stability Index 118.9
COMMENTS
Builder's displacement.
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  03420004LRP Issued on 17/04/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
JACOBIGBR-5379T
Hellenic Sailing Federation
Offshore Committee
Επιτροπή Ανοικτής Θαλάσσης
Ελληνικής Ιστιοπλοϊκής Ομοσπονδίας
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 VMG2053.21414.41161.41030.8952.2906.7887.0876.6890.2
52°1301.7921.9776.7697.6649.5623.3612.3604.2604.8
60°1208.5873.9743.6670.1626.7603.7593.1584.2582.2
75°1157.8846.2719.6648.0607.0585.2572.7559.5553.8
90°1168.4832.9691.4617.6583.8568.5560.1544.3530.6
110°1142.3817.0678.8606.6572.1551.2534.3508.9490.4
120°1193.3845.3695.7614.9575.1552.6533.2498.9478.2
135°1349.7931.7752.6652.9596.2566.3544.7504.8475.9
150°1610.41087.6853.3725.3644.9595.5567.6527.6492.0
Run VMG1859.61255.8985.2833.3732.3659.4608.6556.1519.3
Selected Courses
Windward / Leeward1956.41335.11073.3932.0842.2783.0747.8716.4704.8
All purpose1482.51031.3843.3742.0682.3647.0626.7603.5591.6
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward880.40.6815
All purpose711.30.8436
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.5810
Downwind "popa"0.7459
70% up, 30% down "Ilhabela"0.6223
30% up, 70% down "Ilhabela-inverso"0.6874
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Predominantly Upwind779.20.7700
Predominantly Downwind714.50.8398
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP739.70.8111 Predom. Rc High573.11.0470 5B SF Bay L/M982.70.6106 TriNum AP Low937.30.6401 Predom. Dn Low1126.50.5326 5B SF Bay Med830.90.7221 TriNum AP Med706.90.8488 Predom. Dn L/M816.90.7345 5B SF Bay M/H741.50.8091 TriNum AP High623.10.9629 Predom. Dn Med685.70.8750 5B SF Bay High709.70.8455 TriNum W/L Low1265.30.4742 Predom. Dn M/H607.00.9885 5B AP Low1043.90.5748 TriNum W/L Med876.70.6844 Predom. Dn High569.91.0528 5B AP L/M811.50.7393 TriNum W/L Hig744.80.8056 ChiMac Up Low1012.00.5929 5B AP Med695.10.8631 Predom. Upwind815.30.7359 ChiMac Up Med902.40.6649 5B AP M/H630.90.9511 Predom. Reaching708.10.8474 ChiMac Up High775.70.7735 5B AP High605.50.9910 Predom. Downwind749.70.8004 ChiMac Off Low959.60.6253 5B W/L Low1425.00.4211 Predom. Up Low1165.30.5149 ChiMac Off Med840.30.7140 5B W/L L/M1028.00.5837 Predom. Up L/M869.00.6904 ChiMac Off High700.70.8563 5B W/L Med858.60.6988 Predom. Up Med750.80.7991 ChiMac AP Low980.80.6118 5B W/L M/H756.40.7932 Predom. Up M/H689.20.8706 ChiMac AP Med867.60.6916 5B W/L High719.80.8336 Predom. Up High669.90.8956 ChiMac AP High735.70.8156 W/L 60-40 Low1442.10.4160 Predom. Rc Low1017.00.5900 BayMac Cove Island1133.90.5291 W/L 60-40 L/M1046.70.5732 Predom. Rc L/M756.30.7934 BayMac Shore1125.60.5330 W/L 60-40 Med880.80.6812 Predom. Rc Med652.60.9194 Harvest Moon616.30.9736 W/L 60-40 M/H783.90.7654 Predom. Rc M/H597.91.0036 5B SF Bay Low1200.00.5000 W/L 60-40 High752.00.7979      SA/DSPL Up14.10SA/DSPL Dn19.85
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance775.6
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating775.60.7736
FinRating, kevyt tuuli1404.80.7119
FinRating, kova tuuli609.60.8202
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance0.7736
Triple Number Coastal/Long Distance Low0.6401
Triple Number Coastal/Long Distance Medium0.8489
Triple Number Coastal/Long Distance High0.9629
Triple Number Windward/Leeward Low0.4983
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
For information
General Purpose Handicap (GPH)803.1
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Saronikos S All Purpose829.30.7235
Saronikos S Upwind950.70.6311
Saronikos S Downwind679.60.8829
Saronikos N All Purpose866.80.6922
Saronikos N Upwind991.40.6052
Saronikos N Downwind745.20.8051
Saronikos SW All Purpose840.90.7135
Saronikos SW Upwind981.30.6114
Saronikos SW Downwind694.70.8637
Saronikos NE All Purpose900.20.6665
Saronikos NE Upwind928.60.6461
Saronikos NE Downwind844.40.7106
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose739.70.8111
5-Band All Purpose Low1140.70.5260
5-Band All Purpose L/M839.70.7146
5-Band All Purpose Med716.20.8377
5-Band All Purpose M/H647.10.9272
5-Band All Purpose High619.30.9688
Single Number Predominant Upwind778.10.7711
Single Number Predominant Reaching676.70.8866
Single Number Predominant Downwind714.70.8395
5-Band 50-50 Windward/Leeward Low1425.00.4211
5-Band 50-50 Windward/Leeward L/M1028.00.5837
5-Band 50-50 Windward/Leeward Med858.60.6988
5-Band 50-50 Windward/Leeward M/H756.40.7932
5-Band 50-50 Windward/Leeward High719.80.8336
5-Band 60-40 Windward/Leeward Low1442.10.4160
5-Band 60-40 Windward/Leeward L/M1046.70.5732
5-Band 60-40 Windward/Leeward Med880.80.6812
5-Band 60-40 Windward/Leeward M/H783.90.7654
5-Band 60-40 Windward/Leeward High752.00.7979
Triple Number 50-50 Windward/Leeward Low1265.30.4742
Triple Number 50-50 Windward/Leeward Med876.70.6843
Triple Number 50-50 Windward/Leeward High744.80.8056
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward902.80.6646
Triple Number 60-40 Windward/Leeward Low1282.50.4678
Triple Number 60-40 Windward/Leeward Med898.30.6679
Triple Number 60-40 Windward/Leeward High773.50.7757
Triple Number All-Purpose Low1019.10.5887
Triple Number All-Purpose Med728.80.8232
Triple Number All-Purpose High638.60.9395
Triple Number Predominant Upwind Low1053.20.5697
Triple Number Predominant Upwind Med767.00.7823
Triple Number Predominant Upwind High689.90.8697
Triple Number Predominant Reaching Low918.00.6536
Triple Number Predominant Reaching Med675.40.8883
Triple Number Predominant Reaching High579.81.0349
Triple Number Predominant Downwind Low1002.30.5986
Triple Number Predominant Downwind Med698.50.8590
Triple Number Predominant Downwind High583.61.0281
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low937.4
Triple Number Coastal/Long Distance Medium706.8
Triple Number Coastal/Long Distance High623.1
Triple Number Windward/Leeward Low1204.1
Triple Number Windward/Leeward Medium876.7
Triple Number Windward/Leeward High744.8
Predominantly Upwind779.2
Predominantly Downwind714.5
Predominantly Reaching686.3
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.6401
Triple Number Coastal/Long Distance Medium0.8489
Triple Number Coastal/Long Distance High0.9629
Triple Number Windward/Leeward Low0.4983
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8056
Coastal/Long Distance0.7736
Predominantly Upwind0.7700
Predominantly Downwind0.8398
For information
General Purpose Handicap (GPH)803.1
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)0.8436
Distanseseilas Trippeltall svak vind0.6401
Distanseseilas Trippeltall mellomvind0.8489
Distanseseilas Trippeltall sterk vind0.9629
Pølsebane Trippeltall svak vind0.4983
Pølsebane Trippeltall mellomvind0.6844
Pølsebane Trippeltall sterk vind0.8056
Motvind Singeltall0.7700
Medvind Singeltall0.8398
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Coastal/Long Distance775.60.7736
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind779.20.7700
Predominantly Downwind714.50.8398
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore708.30.8472
Cape Doctor Coastal595.21.0081
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.6401
Triple Number Coastal/Long Distance Medium0.8489
Triple Number Coastal/Long Distance High0.9629
Triple Number Windward/Leeward Low0.4983
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8056
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.6401
Triple Number Coastal/Long Distance Medium0.8489
Triple Number Coastal/Long Distance High0.9629
Triple Number Windward/Leeward Low0.4983
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8056
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Predominantly Upwind779.20.7700
Predominantly Downwind714.50.8398
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance775.60.7736
Triple Number Coastal/Long Distance Low937.40.6401
Triple Number Coastal/Long Distance Medium706.80.8489
Triple Number Coastal/Long Distance High623.10.9629
Triple Number Windward/Leeward Low1204.10.4983
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High744.80.8056
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1946.71327.21007.8837.3730.9671.8632.7575.7561.4
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP739.70.8111 Predom. Dn High569.91.0528 5B AP M/H630.90.9511 TriNum AP Low937.30.6401 Predom. Rc Low1017.00.5900 5B AP High605.50.9910 TriNum AP Med706.90.8488 Predom. Rc L/M756.30.7934 5B SF Bay Low1200.00.5000 TriNum AP High623.10.9629 Predom. Rc Med652.60.9194 5B SF Bay L/M982.70.6106 TriNum W/L Low1265.30.4742 Predom. Rc M/H597.91.0036 5B SF Bay Med830.90.7221 TriNum W/L Med876.70.6844 Predom. Rc High573.11.0470 5B SF Bay M/H741.50.8091 TriNum W/L Hig744.80.8056 5B W/L Low1425.00.4211 5B SF Bay High709.70.8455 Predom. Upwind815.30.7359 5B W/L L/M1028.00.5837 ChiMac Up Low1012.00.5929 Predom. Reaching708.10.8474 5B W/L Med858.60.6988 ChiMac Up Med902.40.6649 Predom. Downwind749.70.8004 5B W/L M/H756.40.7932 ChiMac Up High775.70.7735 Predom. Up Low1165.30.5149 5B W/L High719.80.8336 ChiMac Off Low959.60.6253 Predom. Up L/M869.00.6904 W/L 60-40 Low1442.10.4160 ChiMac Off Med840.30.7140 Predom. Up Med750.80.7991 W/L 60-40 L/M1046.70.5732 ChiMac Off High700.70.8563 Predom. Up M/H689.20.8706 W/L 60-40 Med880.80.6812 ChiMac AP Low980.80.6118 Predom. Up High669.90.8956 W/L 60-40 M/H783.90.7654 ChiMac AP Med867.60.6916 Predom. Dn Low1126.50.5326 W/L 60-40 High752.00.7979 ChiMac AP High735.70.8156 Predom. Dn L/M816.90.7345 5B AP Low1043.90.5748 BayMac Cove Island1133.90.5291 Predom. Dn Med685.70.8750 5B AP L/M811.50.7393 BayMac Shore1125.60.5330 Predom. Dn M/H607.00.9885 5B AP Med695.10.8631 Harvest Moon616.30.9736      SA/DSPL Up14.10SA/DSPL Dn19.85
ORC Ref  03420004LRP Issued on 17/04/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
JACOBIGBR-5379T
Hellenic Sailing Federation
Offshore Committee
Επιτροπή Ανοικτής Θαλάσσης
Ελληνικής Ιστιοπλοϊκής Ομοσπονδίας
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassTWISTER 28Measurement16/04/2022HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
Length overall8.610Maximum beam2.460Draft1.526Displacement4,521Wetted area19.11IMS L7.082LSM06.919Accomod. length7.995Sink (kg/mm) 12.18
VCGD-0.205VCGM-0.050 RM Rated (kg·m) 49.7Limit of positive stability(°) 114.3 Stability Index 118.9 BLR index 0.0000Default crew weight407 Declared crew weight 240
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeSolid 3 blades
InstallationIn ApertureTwin screwNoHydro generatorNo
PRD0.340PBW0.120PIPA0.0081
APH0.440APT0.200APB0.250
RIG
BackstayFixedForestayFixedInner forestayNot installedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders1Rotating mastNo
P8.550IG10.400ISP10.420MDT10.100MDL10.140MDT2MDL2TLNo TaperMWGO
E3.290J3.240BAS1.780FSDFoilSFJ0.000SPL3.680WPLTPS3.270BDMWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date01/01/2013
SFFP0.629FFM0.952FF0.952LCFcl4.822SG1.0264
SAFP8.352FAM0.515FA0.515LCFsh4.984HBI0.714
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  03420004LRP Issued on 17/04/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club Certificate2026
JACOBIGBR-5379T
Hellenic Sailing Federation
Offshore Committee
Επιτροπή Ανοικτής Θαλάσσης
Ελληνικής Ιστιοπλοϊκής Ομοσπονδίας
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.140.591.041.872.6615.5716/04/2022
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment10.030.541.082.263.574.999.79NoNo 23.1816/04/202240.030.350.691.382.132.946.59NoNo 9.3916/04/2022
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment110.319.659.984.515.4084%38.9916/04/2022
NON MANUAL POWER CONTROLS (NMP)
SheetsNoMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsNo
CRUISER/RACER REQUIREMENTS*
Accommodation length8.0 mTable area0.33 m²Headroom1.40 mMinimum number of berths3Personal gear stowage0.12 m³Fresh water capacity30 lMinimum number of seats in cockpit3Food stowage0.18 m³Fuel capacity20 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.
ORC Ref  03420004LRP Issued on 17/04/2026 Valid until 31/12/2026
VPP ver: 2026 1.00 | © ORC | www.orc.org