{{disambig
In boating, P-class could refer to either of:
*
a development class for racing yachts under the
Universal Rule devised in 1902 by
Nathanael Herreshoff
Nathanael Greene Herreshoff (March 18, 1848 – June 2, 1938) was an American naval architect, mechanical engineer, and yacht design innovator. He produced a succession of undefeated America's Cup defenders between 1893 and 1920.
Biography
Herr ...
for
America's Cup
The America's Cup, informally known as the Auld Mug, is a trophy awarded in the sport of sailing. It is the oldest international competition still operating in any sport. America's Cup match races are held between two sailing yachts: one f ...
racing
*
a class of sailing dinghy developed in New Zealand in 1923 by
Harry Highet