77: War Stories. Mental Toughness and Clever Tactics in Vietnam and for Life. With CWO Roger Hayden
Jocko Podcast
00:00
How to Do Hydrographic Reconnaissance
The underwater demolition team used a line that stretches from the beach, all the way out to a boat. They'd be holding up these markers so that you could get yourself on them. You'd be dipping, doing down until you got to that point again, then you'd take your sounding again. And then you come back and make a hydro-graphy chart.
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