Harvey,
I too am retired USCG and my comment is based upon my experiences, while actually performing search and rescue, in my first 4 your of duty, while assigned to small boats (CG small boats are boats that are less than 65'), out of Charleston, SC.
Back in the early 70's, we navigated by paper charts and compass. Our VHF communications were not very good and out AM radio was even worse. Add to that, someone calling for help on their poor quality radio transmission...