- NPOL
ALTAS-X is a variable depth surface-ship sonar system for detection, localisation and classification of silent submarines in active and passive modes. As an advanced underwater sensor system, it provides early warning of torpedo attack, thereby strengthening the Anti-Submarine Warfare (ASW) capabilities of advanced warships. ALTAS-X has the distinct advantage of having a long array to exploit the low frequency spectrum of the radiated noise, low losses of propagation, capability to operate at different depths to make best use of the prevailing hydrological conditions and minimal effect of self-noise of the platform.
Active towed array sonar for ASW Operations in deep and littoral water
The Directional Sonobuoy is an Airborne SONAR system, which an expendable type passive sensor is called DIFAR Sonar (DIFAR - Directional Finding and Acoustic Ranging sensor). It is mainly used for Anti-Submarine Warfare (ASW) operations by the Naval Forces to determine targets of interest to take appropriate counter measures. It is launched from either Fixed Wing Aircraft (or) Rotary Platforms namely P8I and MH-60R platforms respectively. It is made to NATO A-Size (H=914 mm and Dia = 124 mm), and its overall weight is about 9.0 kg. It consists of three Acoustic sensors like (Surface Omni (SO) and Deep Omni (DO)) and One Directional Sensor. The Sonobuoy system consists of on-board systems like Signal Processing (SP) ATR and HMI display console installed in the ASW platforms.
It is mainly used for Anti-Submarine Warfare (ASW) operations by the Naval Forces to determine targets of interest to take appropriate counter measures.
LFDS is an airborne sonar system which can be deployed from rotary wing platforms, for effectively acting as force multiplier for naval ships. It provides the advantages of lower frequency combined with higher source level for range advantage in littoral Anti-Submarine Warfare (ASW). It enables the deployment of sensors to deeper depths for detection of deep dived submarines. It is an integrated system capable of simultaneously processing inputs from sonobuoys and dunking sonar.
The system uses the latest technologies and employs well-proven algorithms, which enable the in sonification of relatively long ranges with the required resolutions, to adequately meet present day ASW requirements.
ATDS-X is a complete package involving sensors and decoys for defence against vintage as well as modern torpedoes. It is a fully integrated system having both torpedo detection and countermeasure capabilities. The system can receive inputs from both Hull Mounted Sonar (HMS) and Towed Array Sonar (TAS) for panoramic detection and tracking of torpedoes. There is an intercept sensor to characterize the active homing signature of the torpedo. Acoustic decoying is affected using two types of decoys – Towed Decoy and Expendable Decoys. The complete wet end including the towed array sonar and towed decoy is launched and retrieved using a hydraulically operated winch system. The data from the sonar is processed in the Fire Control System (FCS) to localize the torpedo and obtain critical information on range, speed etc. The FCS also calculates the escape parameters like own ship bearing and speed for evading the torpedo.
ATDS-X is a complete package involving sensors and decoys for defence against vintage as well as modern torpedoes. It is a fully integrated system having both torpedo detection and countermeasure capabilities.
CHITR-M1 is a wide-band high-frequency imaging sonar which gives excellent image quality and good object detection ranges. It’s a compact system designed for dual use purposes. Military applications include Autonomous Underwater Vehicle (AUV) navigation, marine mine detection, ship hull inspection and harbour security. In the civilian sector, CHITR-M1 can be used for underwater structural monitoring, search and salvage. Compact and low power design of CHITR–M1 enables fitment to light weight class AUVs and Remotely Operated Vehicles (ROVs). CHITR-M1 utilizes Ethernet connectivity to establish data and control communication with host computers, using a single data and power cable which can be extended up to 70 meters.
CHITR-MI is a compact imaging sonar which has application in AUV navigation and underwater imaging. The sonar is designed for light weight class AUV and can be configured for obstacle avoidance. The sonar also has use case for bottom imaging as part of mine detection surveys.
HMS-X2 is an advanced and compact sonar system designed for Anti-Submarine Warfare (ASW) ships. It is an integrated active cum passive SONAR system, specifically targeted for installation on small to medium platforms such as ASW corvettes and patrol vessels. It employs advanced adaptive signal and information processing techniques for detection, tracking and classification of targets. The hardware architecture is based on state-of-the-art open-architecture processor technologies that will enable smooth upgrade of the system capabilities. A compact transducer array, modular front-end signal conditioning hardware and high-efficiency switched-mode power amplifiers make up the rest of the system.
Ship SONAR for ASW operations
PDDS-X is a portable sonar system capable of detecting potential underwater threats like divers and diver delivery vehicles in shallow waters. The system alerts the operator to confirm the type of threat so that effective countermeasures can be initiated in time. The system can be deployed either outboard a ship or at any location in a harbour, typically beside a wall, pier or at the sea bottom. The system consists of two parts, an underwater unit and a shore unit, interconnected by water blocked cable carrying data and power supply lines. The underwater unit is a sonar head consisting of transducer arrays, transmitter and front-end receiver electronics hardware. The shore unit consists of the processing and display units, data recorder and power supply. As an auto-alert system, PDDS-X performs detection, tracking and classification of divers or diver-like targets automatically and alerts the operator accordingly. The target information provided by the system include:
(i) Target position (range and bearing) and
(ii) Target dynamics (speed and course).
Seaport protection and Offshore asset protection from divers and diver-like threats
SMS-X is an integrated suite of sonar systems for installation onboard submarine. It is essentially a compendium of multiple sensors for passive detection, which collates different characteristics of the same target and provides target data through information fusion. The constituent sonars in the suite include passive sonar, active sonar, intercept sonar, obstacle avoidance sonar and underwater telephony. The suite incorporates advanced signal processing techniques and state-of-the-art hardware platforms. The system provides advanced classification features, contact motion analysis and automatic torpedo detection capabilities. The target presentations to the user are garnished with a gallery of user-friendly and tactically useful information. The suite is provided with end-to-end redundancy for passive SONAR systems. It is developed on modular design approach with state-of-the-art technologies and standard interfaces. SMS-X is scalable to suit submarine platforms with varying levels of displacement capacity.
SONAR for Kilo-class submarine