Surface Vessel - NOAS


Incorporating the functionality for security, safety, tracking and imaging, Sonardyne’s NOAS is a bow-mounted navigation and obstacle avoidance sonar offering long range detection and mapping of the seabed to deliver the best possible early warning of depth and grounding hazards ahead of the vessel. It maps the seabed ahead of the vessel in high resolution 3D, displaying water depth and terrain information in an easy to use graphical display. The 2D mode provides a longer range with a 2D display.

In addition, when the vessel is at a standstill or moving slowly, NOAS can be combined with Sonardyne’s diver detection sonar, Sentinel, to continuously monitor the surrounding area for underwater targets and the potential threat they present. The low false alarm detection capabilities ensure that only genuine tracks with threatening intent are displayed.


Range / Field of View 75m, 150m, 300m, 600m, @ 90° (Depth mode)
25m to 150m x 180°, 300m @ 120°, 600m to 1500m @ 90° (Sonar mode)
1,500m @ 180° (Intruder Detection mode)
600m (3D imaging)
1,500m (Obstacle avoidance
Operational Speed Up to 25 knots
Weight in Air 95 kg (Sonar array), 11.5 kg (Projector)
Chart Overlay ENCX. Supports ENC (S-57), ARCS, NOAA RNCs
Bottom Mapping Ratio Up to 20x water depth
Maximum Depth Detection 50 metres below keel
Power Requirements <150 Watts
Operating Frequency 70 kHz with 20 kHz bandwidth
Maximum Output Power 208 dB re 1µPa @ 1m
Angular Accuracy ~0.2
Roll/Pitch Stabilisation ±20°
In-Water Target Ping Stabilisation 208 dB re 1µPa @ 1m
Maximum Output Power Yes
User Definable Automated Alarms Yes
Display of Ship's Navigation Information Latitude, Longitude and Heading
Operating System Windows 7
Integration into 3rd Party ECDIS/ECS Multi-vendor