Maritime Domain Awareness

Maritime Domain Awareness (MDA) is an integrated continuum from situational awareness information to current and predictive intelligence

  • Understanding maritime normal
  • Identify/understand trends
  • Anomaly detection
  • Threat warning & cueing

Automatic Identification System (AIS) as specified by IMO, is a ship and shore based broadcast system, operating in the VHF maritime band. AIS is capable of sending and receiving ship information such as identity, position, course, speed, ship particulars and cargo information to and from other ships and shore stations. It can handle over 4,000 reports per minute and updates information as often as every two seconds. AIS uses Self-Organising Time Division Multiple Access (SOTDMA) technology. Shipboard AIS provides automatic and accurate information regarding risk of collision by calculating Closest Point of Approach (CPA) and Time to Closest Point of Approach (TCPA)

 

 

There are two classes of AIS, Class A and Class B, as well as different types of AIS used for shore stations (AIS Base Stations), aids to navigation (AIS AtoN), AIS on search and rescue aircraft and AIS search and rescue transmitters (AIS SART).

 

Classes of AIS

Classes Remark
AIS Class A

Class A has been mandated by the International Maritime Organisation (IMO) for vessels of 300 gross tonnage and upwards engaged on international voyages, cargo ships of 500 gross tonnage and upwards not engaged on international voyages, as well as passenger ships (more than 12 passengers), irrespective of size.

AIS Class B

Class B provides limited functionality and is intended for non-SOLAS vessels. It is not mandated by the International Maritime Organisation (IMO) and has been developed for vessels such as work craft and pleasure craft.

 

Types of AIS

Classes Remark

AIS Best Station

Base Stations are provided by an aids to navigation authority to enable the ship to shore / shore to ship transmission of information. Networked AIS Base Stations can assist in providing overall maritime domain awareness.

AIS aids to Navigation (Aton)

AIS AtoN provide an opportunity to transmit position and status of buoys and lights through the same VDL, which can then show up on an electronic chart, computer display or compatible radar.

AIS SART

Search and Rescue Transmitters using AIS can be used to assist in determining the location of a vessel in distress.

AIS on Search and Rescue (SAR) Aircraft

Search and Rescue Aircraft may use AIS to assist in their operations.

 

Application Program

 

 

   Related Products   
   Press Release   
   Sharing Knowledge   
Fleet Monitoring System

Businesses which deal with some sort of transportation (wholesaler, courier, expedition, mining, and fishing) need to maintain their efficiency by

Maritime Domain Awareness

Maritime Domain Awareness (MDA) is an integrated continuum from situational awareness information to current and predictive