What is Primage?

Legal Definition
In commerce, primage (adopted from the Fr. primage, from prime, recompense, Lat. praemium, reward), was a small customary payment over and above the freight made to the master of the ship for his care and trouble. It is now generally included in the freight, as an additional percentage. It varies according to the usages of different ports and particular trades.
-- Wikipedia
Legal Definition
Merc. law. A duty payable to the master and mariner of a ship or vessel; to the master for the use of his cables and ropes to discharge the goods of the merchant; to the mariners for lading and unlading in any port or haven. Merch. Dict. h. t.; Abb. on Ship. 270.

2. This payment appears to be of very ancient date, and to be variously regulated in different voyages and trades. It is sometimes called the master's hat money. 3 Chit. Com. Law, 431.
-- Bouviers Law Dictionary
Legal Definition
In mercantile law. A small allowance or compensation payable to the master and mariners of a ship or vessel; to the former for the use of his cables and ropes to discharge the goods of the merchant; to the latter for lading and unlading in any port or haven. Abb. Shipp. 404; Peters v. Speights, 4 Md. Ch. 381; Blake v. Morgan, 3 Mart O. S. (La.) 38L
-- Black's Law Dictionary
Legal Definition
Compensation paid to a shipmaster for his care of goods, which he is entitled to retain in the absence of an agreement with the owners to the contrary. See 4 Md. Ch. 375.
-- Ballentine's Law Dictionary