Method and apparatus for determining soil strength from Doppler-

Method and apparatus for determining the length of tubular membe

Method and apparatus for determining the local velocities in a m

Method and apparatus for determining the position of a mobile ap

Method and apparatus for echo transit time determination

Method and apparatus for echolocation

Method and apparatus for eliminating substantially false...

Method and apparatus for fault-tolerant, correlation SONAR...

Method and apparatus for fixed target echo suppression in distan

Method and apparatus for hydroacoustic detection and characteriz

Method and apparatus for improved active sonar using...

Method and apparatus for locating the user of a computer system

Method and apparatus for locating underwater objects

Method and apparatus for measurement of length and height of obj

Method and apparatus for measuring a distance using ultrasonic e

Method and apparatus for measuring distance

Method and apparatus for measuring the depth of an underwater ta

Method and apparatus for measuring water velocities and discharg

Method and apparatus for monitoring and controlling the dispensi

Method and apparatus for monitoring bridge structures for scouri