(under subclass 87) Subject matter in which the paths of acoustic waves to and/or from the transmitter-receiver are directed laterally and downwardly into a body of water from a moving vessel on the body of water or in which a topos:graphical record of the bottom of the body of water is produced from acoustic waves received at the moving vessel.
(1) Note. The contour mapping devices of this subclass type are not limited to side scanning types.
