02:23
Sonar
Renowned oceanographer and geophysicist Walter Munk talks about sonar, which stands for sound navigation and ranging, the process by which objects
Subject: sonar
Transcript: Let me talk about sonar, and first of all say there are Two entirely different types of sonar. The simpler one is passive sonar, it simply means
01:02
Post-World War II Oceanography
Geophysicist and geologist Tanya Atwater talks about technology developed as part of the war effort in the 1940's that would prove critical in the formulation of plate tectonics theory.
Subject: sonar
Transcript: . And they developed, very good sonars To figure out the depth of the ocean. The oceanographic ships picked up those instruments And began working with