Properties:

A computer which utilizes a power driven mechanism and/or electronic or electrical circuits to calculate two or more factors of sonar data, such as range, bearing, depth and/or sound velocity. Sonar is defined as the transmission and/or reception of underwater sound waves to determine the presence, location, nature of objects or noise on or in the water and/or for permitting an exchange of intelligence through water for communication purposes. Do not use for computers which derive single functions. See also computer, depth charge release time.