There are four classes of vessel:

Class A

All square – rigged vessels (barque, barquentine, brig, brigantine or ship rigged) and all other vessel more than 40 metres Length Overall (LOA), regardless of rig.

Class B

Traditionally rigged vessels (ie gaff rigged sloops, ketches, yawls and schooners) with an LOA of less than 40 metres and with a waterline length (LWL) of at least 9.14 metres.

Class C

Modern rigged vessels (i.e Bermudan rigged sloops, ketches, yawls and schooners) with an LOA of less than 40 metres and with a waterline length (LWL) of at least 9.14 metres not carrying spinnaker-like sails.

Class D

Modern rigged vessels (i.e Bermudan rigged sloops, ketches, yawls and schooners) with an LOA of less than 40 metres and with a waterline length (LWL) of at least 9.14 metres carrying spinnaker-like sails.