3 Masted Schooner
Schooner – a sailing vessel with fore and aft sails on three masts. The foremast being shorter than the mainmast which is no taller than the mizzen mast. Originally gaff rigged, nowadays many carry bermudan sails.
In the photos above the Camper & Nicholson Schooner Creole, due to her sail configuration, is known as a staysail schooner, whereas Adix and Shenandoah are both gaff schooners.