Digital sounder module and method for detecting
Digital sounder module and method for detecting
Digitizing planimeter
Dimensioning system and method of dimensioning
Dimensioning system and method of dimensioning
Directional acoustic transducer
Display system for fish sonar
Distance detecting apparatus
Distance measurement device
Distance measurement system
Distance measuring device for acoustically measuring distance
Distance measuring system arranged to limit false indications of
Distance measuring system using ultrasonic ranging
Distance measuring systems altimeters and aircraft
Distance sensing apparatus
Distance sensing device
Diver orientation apparatus and method
Doppler consistent hyperbolic frequency modulation
Doppler velocimeter for monitoring groundwater flow
Drag antenna