Trabakkolo is a full-lined trading vessel with the length of about 60 - 100 feet. Mainly she was used in the Adriatic Sea and her origin was of Chioggia, a town not far from Venetia. The ratio of the length to the width was approximately 3. These vessels had a good fame as very fine coastal ships, which also often came to an open sea. Sometimes trabakkolo were used for transportation of troops. A detachment of USA navy ships in the Mediterranean Sea bought at the beginning of the 19th century two trabakkolas for rebuilding them into bombardier ships. Trabakkolo had two masts. The mainmast stood vertically in 5/19 of the length of the deck from the stern and a foremast slightly inclined forward and stood in the 15/19 of the length of the deck from the stern. The length of the mainmast from the keel to the top was equal trebled maximal width of the vessel and the foremast was lesser in 1 foot 8 inches. Trabakkolo was a lugger-rigged vessel and on the first mast she had a changing to another tack lugger sail and one unchangeable on the foremast. On the foot of the sail both of them had booms. The difference between changeable and unchangeable lugger sails was in methods of their fastenings. In case of a changeable sail the halyard was fastened on the yard at about 2/5 of the yard's length counting to the bow, i.e. nearly in the middle of the yard, and the halyard was belayed forward of the mast (often on the forecastle). Sails were set on the leeward side of the mast. In maneuvering and changing a course the lower end of the yard was put around the mast so as to carry a sail on the leeward side and again the tack was fastened by a hook on an appropriate belaying pin. In case of unchangeable lugger sail the tack was fastened at ? - 1/3 of the yard's length counting from the lower end of the yard and the tack was fastened on the mast or down on the deck. They did not change this sail at maneuvering and that was why it was placed either on the leeward or on the weather side of the mast. The bowsprit was sliding and it carried 1 or 2 flying jibs. The masts of the trabakkola were without stays as on many vessels of the Mediterranean Sea.