DSV Adams Challenge Contract Won
(2/9/2008) MES have been awarded a contract working with Astilleros Balenciaga to supply and fit the integrated bridge equipment onboard Adams Offshore newest vessel the DSV Adams Challenge. The vessel will be a dynamically positioned diesel electric powered multi role offshore support vessel with a dual redundant dynamic positioning system configured to and suitable for supporting a wide range of offshore support activities.
navigation > Automatic Identification System (AIS)
The Automatic Identification System (AIS) is a system used by ships and Vessel Traffic Services principally for identification and locating vessels. AIS helps to resolve the difficulty of identifying ships when not in sight (e.g. in fog, at distance, etc.) by providing a means for ships to exchange identification, position, course, speed, and other ship data with all other nearby ships and VTS stations. It works by integrating a standardized VHF transceiver system with an electronic navigation system, such as a Global Positioning System receiver, and other navigational sensors on board ship (gyrocompass, rate of turn indicator, etc.).
The International Maritime Organization\'s (IMO) International Convention for the Safety of Life at Sea (SOLAS) requires a class A AIS to be fitted aboard international voyaging ships of 300 or more gross tonnage, and all passenger ships regardless of size.
Basic overview
AIS transponders automatically broadcast information, such as their position, speed, and navigational status, at regular intervals via a VHF transmitter built into the transponder. The information originates from the ship\'s navigational sensors, typically its global navigation satellite system (GNSS) receiver and gyrocompass. Other information, such as the vessel name and VHF call sign, is programmed when installing the equipment and is also transmitted regularly. The signals are received by AIS transponders fitted on other ships or on land based systems, such as VTS systems. The received information can be displayed on a screen or chart plotter, showing the other vessels\' positions in much the same manner as a radar display.
Broadcast information
AIS transceiver sends the following data every 2 to 10 seconds depending on vessels speed while underway, and every 3 minutes while vessel is at anchor. This data includes:
Maritime Mobile Service Identity (MMSI) of vessel - vessel\'s unique identification, 9 digits
Navigation status - \"at anchor\", \"under way using engine(s)\", \"not under command\", etc
Rate of turn - right or left, 0 to 720 degrees per minute
Speed over ground - 0.1 knot resolution from 0 to 102 knots
Position accuracy
Longitude - to 1/10000 minute and Latitude - to 1/10000 minute
Course over ground - relative to true north to 0.1 degree
True Heading - 0 to 359 degrees from eg. gyro compass
Time stamp - UTC time accurate to nearest second when this data was generated
In addition, the following data is broadcast every 6 minutes:
IMO number - number remains unchanged upon transfer of the ship to other flag(s), 9 digits
Radio call sign - international radio call sign assigned to vessel, max 7 characters
Name - Name of vessel, max 20 characters
Type of ship/cargo
Dimensions of ship - to nearest meter
Location of positioning system\'s (eg. GPS) antenna onboard the vessel
Type of positioning system - such as GPS, DGPS or LORAN-C
Draught of ship - 0.1 meter to 25.5 meters
Destination - max 20 characters
ETA (estimated time of arrival) at destination - UTC month/date hour:minute
Furuno AIS type FA150
The FA-150 consists of VHF/GPS antennas, a transponder unit and several associated units.
The transponder contains a VHF transmitter, two TDMA receivers on two parallel VHF channels, a DSC channel 70 receiver, interface, communication processor, LCD display, and internal GPS receiver. The internal 12-channel all-in-view GPS receiver with a differential capability provides UTC reference for system synchronization to eliminate clash among a multiple users.It also gives position, COG and SOG when the external GPS fails.
The LCD panel displays all required information about Static data, Dynamic data, Voyage related data and Short safety-related messages. The information and messages are automatically updated according to the ITU-R M.1371-1, e.g., static information every 6 min and on request, dynamic information every 10 s on ship faster than 3 kt and 3.3 s when changing course at 0-14 kt, etc.
Download BrochureJotron UAIS Type TR-2500
Tron UAIS TR-2500 is a Class A, shipborne transponder designed to meet the IMO regulations on installation of mandatory AIS equipment on board SOLAS vessels.
The TR-2500 meets the following key requirements
– Easy to operate
– Flexible solutions for bridge integration
– Compatibility for system integration
– Quick and easy installation
- Silent mode for military vessels
Fully conforming to IMO Performance Standard,Tron UAIS TR-2500 is Jotron’s latest development and contribution to enhance the level of safety at sea.
With a variety of alternatives the TR-2500 may easily be integrated anywhere on the ships bridge. The compact unit will operate standing alone or fully system-integrated with ECS, ECDIS and Radar systems on board.
