International One Metre
Our most popular class sailed in New Zealand and raced in over 30 countries.. The IOM is very lively and fun to sail. The hull cannot exceed 1000 mm in length and the complete boat ready to sail must exceed 4000 gms. Two channel radio equipment is required, one operates the winch the other the rudder.
The class was created in 1988 by Jan Dejmo aided by Graham Bantock and the Technical Committee of the IMYRU (predecessor of IRSA). It has continued to grow steadily since its creation.
- IOM Boat Registration
- NZLIOMNCA Contacts
- NZLIOMNCA Pages
- IOM Ranking
- IOM Class Links
- Classic IOM Class
- IOM Photos
- IOM Knowledge Base
- 3D PRINTED IOM BOATS
- A Guide to Basic Tuning and Sail Setting on an International One Metre
- Boatbuilding
- Building a Plug
- Cheap Alternative Winch
- How Long IS One Metre
- How to Transport My IOM Boat on a Aeroplane By Bruce Edgar
- IOM Repair by Graham Cross
- IOM Tuning
- IOM Wooden Booms
- K2 Jib Setup
- Laser Tank Measuring
- Launching Ramp
- Links to RC Yacht Plans etc’
IOM Events
June 2025
July 2025
August 2025
September 2025
October 2025
November 2025
December 2025
May 2026
IOM News
2025 Wattle Farm IOM Classic Anzac Day Regatta
This was a fun regatta arranged to give the classic fleet a warm up before the Auckland Classic IOM Champs on Matariki weekend in June. We had a good turnout of 14 boats covering 2 decades and included Dave Panting from Katikati with his SP2 – the fattest of the Fat Boys. ‘Dirty Dancing’ (Cockatoo2) … Read more
DF95 Canterbury Champs 12/13 April 2025 – Event Report
Pegasus Radio Sailing Club (PRSC) hosted 16 competitors in this event. All regions in the South Island were represented with sailors from Otago, Cromwell, Nelson and Pegasus clubs attending. Both days had fine weather conditions, however large variation in breeze. Saturday gave the Race Officer (Gareth) and boatman (Paul) numerous headaches as the light 5 … Read more
OCEANIA25 ENTRY CLOSING 3 MAY
Entries are currently OPEN but will be CLOSING at Midnight Sat 3 May for NZL entrants. NO payment is required until places are confirmed after overseas entries are confirmed and places allocated. For those that have entered we say a big thank you. The current list of entries is published here and sits at 42 as at this morning (23 … Read more
2026 IOM World Championships
The 2026 IOM World Championships are scheduled for Datchet Water, UK from 15 to 22 May 2026. The official website is https://www.iomworlds2026.com/.
North Island IOM Champs held at Wattle Farm 5th & 6th April 2025 – Race Officer Report
Friday was a shocker – rain, sometimes heavy, and a strong Northerly wind. Practise sailing wasn’t popular! Bill Bradley was at the club however, despite the conditions, to complete the weigh in and registration process for 20 keen competitors. This certainly took the pressure of the measuring on Saturday morning. The forecast for Saturday was for fine weather and a mid-range A Rig SW breeze … Read more