bulwark the side of a vessel which extends above the upper deck.

buoy a stationary floating object used as an aid for navigation.

butterworth - a washing process used to gas free or clean a cargo tank, employing hot water or chemicals, sprayed through a patented rotating nozzle.

butterworth opening - a deck access opening with bolted cover, designed for butterworth operations.

camber the upward slope of a vessel's deck, occurring when the centerline is higher than the gunnel.

camel a pontoon used to fender between a vessel and a wharf.

capstan a hand or machine powered, vertical, spindle-mounted drum which rotates and pulls lines by winding.

certification - attesting that a vessel has met specific legal requirements by the issuance of various certificates or validation of documents by certain governmental or private agencies.

channel that portion of a waterway which is naturally or artificially deepened to permit safe navigation within certain limits.

charter party - a contractual agreement between two entities for the purpose of renting, hiring, or leasing the exclusive use of a vessel.

chock a heavy metal casting through which lines may pass for mooring or towing.

CHRIS code - the three letter designation assigned to every entry in the Chemical Hazard Response Information System.

CIF cost, insurance, and freight; cost of transportation and insurance to be paid by the seller of goods to the named point of destination.

classification - the certification process as administered by certain international agencies whereby a vessel is designed, constructed, and maintained to an agency's requirements.

cleat a metal fitting with two projecting horns, around which a rope may be made fast.

clip a small steel bracket used for securing or reinforcing.

coaming a watertight, raised framework around an opening in the deck of a vessel.

cofferdam - the space in a vessel between two closely located parallel bulkheads.

coils a system of small diameter pipes installed inside a liquid cargo tank for the purpose of heating the cargo by means of hot oil or steam.

comehome - a convex curvature of the rake sides of a barge that produces a narrower beam at the headlog than the beam of the hull.

common carrier - a federally licensed company which offers to the general public, under published tariffs, to engage in interstate or foreign transportation of commodities of various types.

compartment - an interior space of a vessel's hull which is formed by bulkheads.

contract carrier - a federally licensed company which offers under individual contracts to engage in interstate or foreign transportation of commodities of various types.

daymark a marker used as an aid to navigation which is visible in daylight.