noun Date: 1967 a sonar that scans the ocean floor to the side of a ship's track and is used especially for mapping the ocean bottom
SIDE-SCAN SONAR
Meaning of SIDE-SCAN SONAR in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012