Originally called MARAUDER 7.25
Adventure Yachts was located in Brisbane, Australia.
Thanks to Vincent & Patricia McGrall for providing information.

A few were later built as the OE 29.

Sometimes called WINDWARD 28.

Based on an earlier Bruce Roberts design for DIY builders.
Shoal draft: 5.0′
Sloop or cutter.
Clearwater Marine was first builder?.
Also known as PASSAGE 34, ROBERTS 341, and WESTCOAST 35.
A Pilot House version was also available.

Water 1: 170 l/44 gal.
Water 2: 300 l/79 gal.
Fuel: 270 l/53 gallons
Holding tank: 100 l/ 26 gallons

Thanks to an OMEGA 46 owner(who wishes to remain anonymous) for additional details.

S&S design #1857
RORC ONE TON.
Most famous examples: ‘Rainbow II'(winner of 1 ton cup -1968);
and ‘Clarionet’ in UK.
It is thought that at least 20 boats to this design were built at various yards.

Designed as IOR One-ton.
Said to have been discontinued because of a concern that it was too similar to the SWAN 38. So very few were built.
S&S #2115.

Thought to be an updated version of the DANBOAT 28.

Draft options:
1.15m/3.77′
1.35m/4.43′
1.70m/5.58′
Twin keel .95m
Swing keel – KU: .75m; KD: 1.95m

Sails:
Mainsail standard 22.4 m²
Self-tacking jib standard 18.1 m²
Genoa I 25.5 m²
Furling Genaker 57.0 m²
Furling Drifter 43.0 m²