Subject matches "Echo Sounder" or its children

PGR time line generator. Coffee grinder

Graphic recorder. 1st unit designed Knott

PGR-Precision graphic recorder. 3rd generation.

PGR-Precision graphic recorder. 3rd generation.

Echo sounder in the lower lab of Atlantis.

New precision echo sounder recorder

Al Carter checking an echo sounder

Carleton Wing (r) and Robert Weeks aboard Crawford

Instrument on stern is Echo sounding towed fish

Hartley Hoskins and Karl Schleicher (with headset) working in lab aboard Crawford

Echo sounder

Echo sounding equipment

Willard Dow and Stephen Stillman with echo sounder used during Thresher search.

Towed echo sounder being installed on board Atlantis II

Willard Dow (L) and Stephen Stillman with echo sounder.

Betty Bunce and Ed Laine analyzing seismic data.

Jan Hahn with echo sounder

Henry Johnson and Oscar Sandoz (Canadian guest).

Henry Johnson with an echo sounder

In lower lab with echo sounder, aboard Atlantis