Senior Survey Technician David Moehl at the controls of Hassler’s multi-beam echosounders in the ship’s Survey Lab. Hassler is equipped with several different seabed mapping systems, each optimized for a different depth range.

Senior Survey Technician David Moehl at the controls of Hassler’s multi-beam echosounders in the ship’s Survey Lab. Hassler is equipped with several different seabed mapping systems, each optimized for a different depth range. Image courtesy of NOAA Office of Marine and Aviation Operations Public Affairs.

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