lugger—A boat using a lug sail.
main—In all rigs of vessels the word “main” applies alike to the principal mast and the principal sail it carries. Generally in ships equipped with two or more masts the second from the bow is the mainmast, although in some rigs, such as ketches and yawls, the mast nearest the bow is the main.
marine—A man in the naval service serving something like a soldier on board a warship. Nowadays the duties of marines often take them ashore where their services are identical with those of soldiers.
mariner—Anciently a first-class or able-bodied seaman.
martingale—The rope extending downward from the jib-boom to the “dolphin striker.” Its duties are those of a stay, or brace.
mast—A long piece or system of pieces of timber or metal placed nearly perpendicularly to the keel of a vessel to support rigging, wireless antennæ, halyards, etc.
master—The captain of a merchant vessel.
mate—literally the master’s assistant. There may be as many as four or five mates on a ship, rated first, second, third, etc. They are officers next in rank to the master.
mess—At sea a company of men or officers who eat or live together.
’midships—The same as AMIDSHIPS.