SECONDARY SURVEY, CONTROL POINTS, AND HYDRO GRAPHIC DEVELOPMENTS

Duration: 18 min

Year Published: 1950

Creator: Department of the Navy (Department of Defense)

Color: Color

Sound: Optical sound

Description: Describes secondary signals, building, sounding and wire dragging operations, tide and current observations, photogrammetric compilation, magnetic observations, and other miscellaneous survey work.

No holdings listed.

No related films.

Record added: 2026-07-01 03:46:06