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Mobile Surveillance Sonar

The C-Scope USP System is an integrated underwater surveillance and protection system based on KONGSBERG’s long experience as a supplier of maritime surveillance systems. The C-Scope USP System integrates a wide range of high-performance active and passive surveillance sensors covering the underwater domain from inner harbor to open sea. The C-Scope USP System performs automatic detection, tracking, classification and identification of multiple targets, and the system is designed for 24/7 operation with a minimum number of staff. 

The LASAR 40M is a part of the C-Scope family of underwater sensor portfolio. The LASAR 40M is optimized for surveillance of specific areas which need temporary protection. The sonar head can be deployed in several configurations including seabed mounting, jetty wall mounting and over the side deployment. 

The LASAR 40M is well suited for fleet protection while at anchor. When naval forces participate in international operations they may have to call temporarily into forward and less secure bases bringing with them suitable systems for protection. LASAR 40M is designed with focus on easy deployment, operation and recovery.


The low frequency and the wide bandwidth provide unmatched detection and classification ranges in littoral and reverberation-limited environments, giving the needed time for decision making with inspection and reaction.

The LASAR 40M exceptional detection ranges resulting in fewer sonars needed to cover a given underwater area. This also means reducing installation complexity and cost. Another benefit from the long detection ranges is that the sonars can be located at convenient locations (locations suitable for maintenance, locations not in conflict with fishing activities, dredging, etc) and still providing full coverage.

Signal Processor and Operator Workstation

Rugged Workstation Laptop Computer is used for signal processing sonar operation. Standard Ethernet protocol is used for integration with external systems.


  • Active mode capabilities against underwater objects
  • Unattended operation with automatic detection, tracking and classification of multiple targets
  • High probability of detection and low false alarm rate
  • Excellent performance in difficult environments and reverberant waters
  • Lightweight sonar head for rapid deployment

Technical Data

Maximum Detection Ranges

SDV - Swimmer Delivery Vehicle: 1500m
OCD - Open Circuit Diver: 1200m
CCD - Closed Circuit Diver: 700m

Sonar Head

Operating frequency range:  30kHz - 45kHz
Source level:  206dB rel 1uPa @ 1m
Pulse type:  HFM
Pulse length:  10ms - 50ms
Acoustic coverage sector: 120°
Vertical beam width, transmit:  12°, 15°
Vertical beam steering, transmit:  ±10°
Bearing resolution / accuracy:  3.6° / 0.36°
Weight in air:  25kg
Dimensions: 601mm x 644mm
Max operating depth:  50m
Subsea cable length 50m

Topside Interface Unit

Weight: 30.8kg
Dimensions: 285mm x 555mm x 785mm
Power:  230Vac, 250W