Types of Sailing Craft Sloop
A Sloop is a single masted vessel, fore and aft rigged with one headsail.
Cutter
Cutter is a single masted vessel with two headsails
Ketch
A ketch is a two masted vessel fore and aft rigged on both masts and the mizzen mast is tepped forward of the rudder head.
Yawl
A yawl is a two masted vessel fore and aft rigged on both masts and mizzen mast is stepped aft of the rudder head
Brigantine
A brigantine is a two masted vessel, square rigged on the fore mast and fore and aft rigged on the after mast.
Asgard
ireland has a Sail training Vessel 'Asgard II' she is a brigantine. You do not have to know about square rigging, but it would be interesting for you to be able to recognise 'Asgard II'
Schooner
A two or more masted vessel fore and aft rigged on all masts. In a two masted schooner the after mast is the main mast.