A bill to prohibit the Coast Guard from converting loran stations off the Pacific Coast to the navigational aid system commonly known as Loran-C until January 1, 1981, or until loran station off the Atlantic coast convert to such system, whichever occurs later.

Prohibits the Coast Guard from converting loran stations off the Pacific coast to the electronic pulsed hyperbolic radio aid to navigation known as Loran-C until January 1, 1981, or until the Coast Guard's loran stations off the Atlantic coast are converted to such system, whichever occurs later.