Hydrographic Assistant Survey Technician serves on a ship, launch, small boat, or field party engaged in oceanographic or survey operations performing such activities as: operating and monitoring fathometers, multibeam, singlebeam or side-scan-sonar instruments, including annotating records and recording data using the above mentioned equipment. Assist in the staging and set-up during preparations for, and at the completion, of oceanographic and survey operations such as tide gauge, horizontal control or sound velocity. Performs oceanographic and/or survey observations, measurements, and calculations. Assist in preparation, installation, deployment and recovery of oceanographic and/or survey equipment and instruments. Process oceanographic and/or survey data, writing a descriptive report. Perform other mission related duties as assigned, including duties related to the safety of the vessel and personnel.