Figure 8. Three displays in the sonar lab on the U.S. EPA Ocean Survey Vessel Bold. The left screen shows a log file created by scientists on watch. The middle screen shows a real-time image of the seafloor. The vertical center line of the screen is the ship’s course over the bottom. Left (port) and right (starboard) images in brown represent the seabed. The right screen displays planned (white) and completed (green and red) ship track lines. After the completion of a line, the bridge is notified and then executes a u-turn to transit a new line. Data collected can be later processed to produce a nearly complete image of the survey area, much like an air photo of the ground. MGS file photo July 3, 2012 by S. M. Dickson.

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Last updated on October 29, 2012

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