ICW - INTRACOASTAL WATERWAY - A system of bays, rivers, and canals along the coasts, connected so that vessels may travel without going into the sea.

INBOARD - More toward the center of a vessel; inside; a motor fitted inside a marine vessel.

INBOARD - OUTBOARD - A drive system mounted to the transom with and inboard engine and an outboard drive system.

Inlet - A waterway leading from a larger area of water (for example, an ocean) to a smaller body of water (bay or river).

INDIA - Letter I in the Marine Radio Alphabet.