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In the XIV-XVI centuries in the composition of combat squadrons and detachments of ships sent to geographic expeditions, specifically included small deck sailing-rowing vessels - frigates, which served messengers of high-speed ships. The sailing rig of such frigates consisted of two oblique Latin sails. The displacement reached 60 - 80 tons. Crew-12-15 people. Usually, when a combat frigate or research vessels follows a squadron of squadrons, the messenger frigate was towed by one of them.
Uganda 1998;3000s;SGMS 1973 Source: V.A. Dygalo: "Sailboats of the World" 2002