HOLIDAY MODEL DE-122 DEPTH SOUNDER
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Explains theory of electronic depth sounders and how this one is installed through the hull of a cabin cruiser while boat is in water. Follows step by step procedure including underwater scenes of frogman working under boat.
Complete catalog record
Source: Raytheon
Interest level: jh-sh-c
Price: free-loan
Format: sd color
Interest level: jh-sh-c
Price: free-loan
Format: sd color
Sources
- Educational film guide. Supplements (1959-62) — title, year, length, format, color, sound, description, catalog record
Record added 2026-07-06 15:47:33