Taking a bar check to calibrate fathometer.
Note transducer clamped to side of boat - officer on right monitoring fathometer
Image ID: theb1487, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Penobscot Bay, Maine
Photo Date: July 1985
Credit: Personnel of NOAA Ship PEIRCE 1985
• High Resolution Photo Available