Blazed and phased array sonar systems and methods

A method for providing imaging sonar comprising:

• connecting at least one of a blazed sonar array and a phased sonar array including at least one transducer to a housing of a sonar unit of an underwater vehicle;
• emitting at least one sonar signal from the at least one transducer, the at least one sonar signal corresponding to at least one electrical signal from a transmitter in electrical communication with the at least one transducer, the at least one sonar signal having a Doppler sharpening pulse length and the sonar unit having a Doppler sharpening velocity, wherein the at least one sonar signal is a Doppler intolerant signal and wherein the Doppler intolerant signal includes a pseudo random noise sequence;
• receiving, by a receiver in electrical communication with the at least one transducer, received signals from the at least one transducer, the received signals corresponding to acoustic signals captured by the at least one transducer;
• and
• controlling, by a first processor in electrical communication with the transmitter, the Doppler sharpening pulse length, wherein the Doppler sharpening pulse length is greater than or equal to 5 ms;
• and
• generating, by a second processor in electrical communication with the receiver, a 3D image based on the received signals, the Doppler sharpening pulse length, and the Doppler sharpening velocity, wherein the Doppler sharpening velocity is greater than or equal to 1.5 m/s.