About 505

Rather than repeat a lot of information that has been painstakingly put together by the International team, we are providing the appropriate links for you to use when looking for specific information.

If there is something missing, please let us know and we will try and plug the gap.

Note that clicking links will open a new browser window or tab.

The Boat

The 5O5 is a double-handed boat that incorporates a light weight, high performance hull design with a powerful sail plan and one trapeze.

The boat is unique in that it has outstanding performance in all conditions.

In light air it is quick and responsive, and in breeze it just goes faster.

Planing begins in 10 knots of wind.


      16’6″ (5.05 meters)
      6’2″ (1.88 meters)
      280 lbs (127.4 kilos)
      Sail Area:
      main (12,30 sq. m.)
      jib (4,94 sq. m.)
      main & jib 175 sq. ft.
      Spinnaker up to (27 sq. m.) approximately (220 sq. ft. original size)
      Two people, one trapeze

Class Rules

These can be found on the International 505 website. The information covers class constitution, measurement rules and diagrams and also 505 Champioship rules.

International 505 Boat Register

This can be found on the International 505 website and is split into two pages:



Measurers – link to main International site



Next Events

26/05/18 Sheppey Open 2018
Isle of Sheppey SC
23/06/18 Stone Open 2018
Stone SC
13/07/18 French Nationals 2018
18/07/18 World Championships 2018
08/09/18 Weymouth Regatta 2018
All events: click here

Latest News

Chris and Sam win a light-airs Inlands
by Neil on 25 November 2017

Martin and Adrian take the Stone Open
by Neil on 2 October 2017

Strong Showing for UK Boats at the Worlds
by Neil on 2 October 2017

2017 Nationals – Results
by Neil on 10 August 2017

World Association AGM Notice
by Neil on 24 July 2017

Latest Adverts

P&B D4 Mainsail 2015 – Only used at 2014 Nationals,and 2016 Worlds.
by MarkandChris on 9 May 2018
BM sails
by Norman on 12 March 2018
North Sails
by Norman on 2 March 2018
by Neil on 6 February 2018
GBR9158 For Sale
by Neil on 30 January 2018

Latest Comments

Recent Events

Euro Cup Garda 2018
UK Nationals 2018
Datchet Open
Datchet Training
Euro Cup Cannes
Burton Sprints
Dinghy Show – Class Social
Winter Training Feb 2018
SJ17 Oxford Blue
Winter Training Feb 2018
SJ17 Rutland Tiger (25th)
SJ17 Bloody Mary
SJ17 Grafham Grand Prix
SJ17 Brass Monkey
SJ17 Datchet Flyer
Inland Championships
SJ17 Draycote Dash
Northampton Open CANCELLED
2017 Gul Final Fling
Stone Open
Belgian Open
World Championships
Datchet Open CANCELLED
Herne Bay Celebration Weekend
UK National Championships
Polish National Championships
French National Championships
European Championships
Largo Bay Regatta
Kiel Week
Europa Cup Hyères
Riva Cup 505 Dyas Korsar – Garda
Class Training, Stokes Bay
Sheppey Open
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Rock Open
Burton Sprints
Class Training
Inland Championships
Burton Open
Belgian National Championship
Danish and Nordic Championships
Arhus Festuge, Denmark
Oresundsugen, Denmark
505 World Championships 2016
Pre-World, British & Open Championship
Class Training
French National Championship
Weymouth Weather and Tides
Kiel Week
Belgian Xtrem Speed Sailing Regatta
Class Training, Castle Cove SC
Stone Open
Swiss Open Championship
Whitstable Open
Europa Cup Italy
Europa Cup France
La Baule
Class Training
Challenge Marcel Buffet 2016
Sheppey Open
Coupe des Vrais Bateaux
Learn from Mike Holt
Ski Voile International
Ovington Inlands
Class Training
DWSC – UK Championship Series
Gul Final Fling
monkstown cork
Adonite 505 Swiss Open
Shotley is cancelled
European Championships
Nordic championships
2015 UK Nationals and Endeavour Trophy
Burton open and training
French National Championships
Stone Open – UKChampSeries 2015
Uk championship Series
A Three day Multi class regatta
eurocup Garda
uk championship Series
Europa Cup France
Class Training at Weymouth and Portland
505 World Championship 2015
Grafham Grand Prix
Tiger Trophy
Steve Nicholson
Bloody Mary
End of Season Championships
Class Training (November)
Swiss Open
2014 Belgian Nationals
Shoreham Open
Largo Bay SC
SAP 505 World Championships 2014
Class Training (CANCELLED)
2014 National Championships
French National Championships
Shotley Open (THE BIG ONE!)
Inland Championships
Keiler Woche Germany
Stone Open
Europ Cup Italy
Trans Alp Cup Italy
Whitstable Open
Carsington SC Open meeting
Euro Cup France
2014 Marcel Buffet Challenge
Class Training (April) POSTPONED
Burton Open
Class Training (March)
Burton Open 2013
Shoreham Open 2013
Belgian Championships 2013
Battle of the Classes Pursuit Race 2013
Polish Open Nationals
European Championships 2013
Stone Open 2013 (Rescheduled)
UK National Championships 2013
French National Championships 2013
Whitstable Open 2013
Shotley Open 2013
Eurocup Germany 2013
Eurocup Italy 2013
TransAlp Cup 2013
SAP 505 World Championships 2013
Challenge Marcel Buffet 2013
Eurocup TransAlp Cup 2013
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