The Ship - Roeder-Johnson
Guide Jimmy begins a ship's tour with a discussion of the once top secret low frequency radio assembly dropped through a well in the hull to a depth of 3km or so, to search for U.S. nuclear subs.  The Ioffe worked in tandem with her sistership typically located 3000 miles away.

Guide Jimmy begins a ship's tour with a discussion of the once top secret low frequency radio assembly dropped through a well in the hull to a depth of 3km or so, to search for U.S. nuclear subs. The Ioffe worked in tandem with her sistership typically located 3000 miles away.