The EM 2040P is a shallow water multibeam echo sounder based

on the EM 2040 technology, an ideal tool for any high resolution

mapping and inspection application.

The receiver and transmitter are integrated in a common sonar

head. The system fulfils, and even surpasses, the IHO-S44 special

order and the more stringent LINZ specification.

Key facts

The operating frequency range is from 200 to 400 kHz. The

operator can on the fly choose the best operating frequency for

the application: 300 kHz for near bottom, 200 kHz for deeper

waters and 400 kHz for very high resolution inspection. Due

to the very large operating bandwidth available, the system

will have an output sample rate up to 60 kHz. The system can

effectively operate with very short pulse lengths. The shortest

pulse is 14 microseconds, which gives a raw range resolution

(cτ/2) of 10.5 mm.

By utilizing both CW and FM chirp pulses, the system can

achieve a much longer range capability with a high resolution.

The maximum depth range in cold ocean water is 600 m at 200

kHz with a swath with up to 830 m.

The angular coverage for the 200 and 300 kHz is 140 degrees,

allowing coverage of 5.5 times water depth. For the 400 kHz

mode the angular coverage is 120 degrees.

As an option the EM 2040P can be delivered with the dual

swath capability, allowing a sufficient sounding density along

track at a high vessel speed.