False distress calls : hearing before the Subcommittee on Coast Guard and Navigation of the Committee on Merchant Marine and Fisheries, House of Representatives, One Hundred First Congress, second session, on H.R. 4632, a bill to amend title 14 United States Code, to impose penalties for inducing the Coast Guard to render aid under false pretenses, to impose liability for costs incurred by the Coast Guard in rendering that aid, and to authorize appropriations for use by acquiring direction finding equipment for the Coast Guard, July 23, 1990, Woods Holes, MA.