19.11.2013

Automatic Identification System (AIS)

 Automatic Identification System (AIS) is designed to improve the safety of navigation, assisting in the efficient navigation of ships, environmental issues, and to interact with the Vessel Traffic Service (VTS) and meets the following functional requirements:

1. work in the 'ship-to-ship' to avoid a collision;

2. as a means of transmitting information about the vessel and its cargo to shore-based services;

3. as a tool for VTS systems, ie in the 'ship-to-shore.'

Automatic Identification System (AIS) transponder consists of a controller and control (display with a minimum of keys). AIS transponder is capable of providing the court and other authorities information about the vessel in automatic mode with a fixed precision and speed, contributing to accurately tracking. Data transmission takes place with minimal crew and a high level of confidence.

AIS devices are available in several types: 

? Class A transceivers They are designed for installation on commercial vessels such  as cargo ships and large passenger vessels. The transceivers transmit the class  information with greater power VHF? signal transceivers than class B so that these  signals can be received at more distant vessels. Furthermore, these signals are  frequently retransmitted. Availability transceivers class is mandatory for all ships of 300 gross tons on international flights and on some  types of passenger vessels operating under the mandate of SOLAS. 

? Stations Inland AIS. Class A transceivers are similar, but  offer additional features for use on inland waterways 

? transceivers class B. In many respects similar to the transceivers  of class A, but they tend to have a lower cost due to less stringent performance requirements. Class B transceivers transmit data with a lower  signal strength and a lower data rate than transceivers  class A. 

? AIS base station. AIS base stations used control systems  for vessel traffic monitoring and control gear AIS transponders. 

? Transceivers navigational aids (CHO, AtoN). CHO  transceivers are mounted on buoys or other hazardous for  shipping locations. These transceivers transmit data about their location  around the courts. 

? AIS receivers. AIS receivers receive transmission from the transceivers Class A, Class  B, CHO and AIS base stations, but do not convey any information about the vessel on which they are  installed. 

? AIS-SART transmitter automatic identification system for search and rescue. 

 

 

Static and dynamic data vessel 

 

The information transmitted by the AIS transponder, is divided into two categories:  static data and dynamic data. 

 

Dynamic vessel data that include the location, the speed over ground  (SOG, SOG) and the track angle (PU, COG), are calculated automatically by EPFS external  or internal GNSS receiver (depending on which one is currently has  valid data and a higher priority). To reflect the current dynamic  state of the vessel must also constantly update the navigation state parameter. 

 

Static data are the information about the ship, which must be  programmed into the AIS transceiver. They include: 

 

? Maritime Mobile Service Identity (MMSI, MMSI) 

 

? Name of the vessel 

 

? Call vessel (if available) 

 

? Type of vessel 

 

? Dimensions of ship 

 

 

Licensing manual AIS 

 

In most countries, AIS transponder operation permitted provided that  licenses for VHF? contact. Therefore vessel that must be installed AIS transponders  must have a license for VHF radiotelephone modern? range, which specifies the type of  AIS vessel and call number MMSI. For more information on the requirements  for licensing radio ship, please contact with the relevant authority in your  country. 

 

 

 

Features
Characteristics of AIS stations	Transmission interval information
Vessels with a velocity of less than 2 units	3 minutes
Vessels with speed 2-14 knots	30 seconds
Vessels with speed 14-23 knots	15 seconds
Court at a speed exceeding 23 knots	5 seconds
Aircraft Search and Rescue	10 seconds
Base station	10 seconds
Aids of navigation	3 minutes

 

ERI ship types (ERI):
Code type of vessel		Class of a ship
The first digit	The second digit
		Main types of vessels
1	#	Reserve
2	#	WIG
4	#	High-speed craft (HSC)
6	#	Passenger ships
7	#	Cargo ships
8	#	Tankers
9	#	Other types of ships
#	0	All ships of this type (without specifying)
#	1	Carrying DG, HS, or MP Category A
#	2	Carrying DG, HS, or MP category B
#	3	Carrying DG, HS, or MP category C
#	4	Carrying DG, HS, or MP category D
#	5	Reserve
#	6	Reserve
#	7	Reserve
#	8	Reserve
#	9	No further information
		Special Court
5	0	Pilot boats
5	1	Search and rescue vessels
5	2	Tugs
5	3	Port requirements
5	4	Vessels with equipment to eliminate pollution
5	5	Patrol Boats
5	6	Reserve - to designate local types of vessels
5	7	Reserve - to designate local types of vessels
5	8	Medical transports (as defined by the Geneva Convention of 1949 and the Additional Protocols)
5	9	Court in accordance with Resolution RR № 18 (Mob-83)
		Other vessels
3	0	Fishing vessel
3	1	Towing vessel
3	2	Towing vessel tug at length exceeding 200 m
3	3	Vessel engaged in dredging or underwater operations
3	4	A vessel engaged in diving operations
3	5	A vessel engaged in military operations
3	6	Ships sailing
3	7	Recreational vessel
3	8	Reserve
3	9	Reserve

Note:

1. DG - dangerous goods; HС - harmful components; MP - marine pollutants .

2.# - indicates the possible combinations of the first and second digits.

Иностранный язык:  en