1. AUTOMATIC IDENTIFICATION SYSTEM?
- The Automatic Identification System (AIS) is an automatic tracking system used on ships and by vessel traffic services (VTS) for identifying and locating vessels by electronically exchanging data with other nearby ships, AIS base stations, and satellites. When satellites are used to detect AIS signatures then the term Satellite-AIS (S-AIS) is used. AIS information supplements marine radar, which continues to be the primary method of collision avoidance for water transport.
- Automatic Identification System (AIS) is a maritime navigation and radio communication system. This system intends to enhance the safety of life at sea, the safety and efficiency of navigation and the protection of the marine environment by communicating navigational information automatically on VHF channels between ship to ship and ship to shore.
An AIS-equipped system on board a ship presents the bearing and distance of nearby vessels in a radar-like display format.
- Information provided by AIS equipment, such as unique identification, position, course, and speed, can be displayed on a screen or an ECDIS.
- AIS is intended to assist a vessel's watchstanding officers and allow maritime authorities to track and monitor vessel movements.
- AIS integrates a standardized VHF transceiver with a positioning system such as a LORAN-C or GPS receiver, with other electronic navigation sensors, such as a gyrocompass or rate of turn indicator.
- Vessels fitted with AIS transceivers and transponders can be tracked by AIS base stations located along coast lines or, when out of range of terrestrial networks, through a growing number of satellites that are fitted with special AIS receivers which are capable of deconflicting a large number of signatures.
- The International Maritime Organization's International Convention for the Safety of Life at Sea requires AIS to be fitted aboard international voyaging ships with gross tonnage (GT) of 300 or more tons, and all passenger ships regardless of size.
2. OPERATION AND MAINTENANCE OF AIS
When turn on the power, main menu will be display and later show the other ship list display. We can select the about information of desire vessel by rotate Joy stick to clockwise and counter clockwise. We also can select Graphic display on the screen by pressing ( DISP/SEL key ).We can setting the
- the voyage static data,
- message,
- Alarm setting,
- set up and
- maintenance on main menu display.
1) Setting the voyage static data
Select the voyage static data by Joy stick and press the joy stick, then can put the data at following status and press enter.
- Navigation status
- Destination
- ETA
- Draught
- Cargo / Status
- Waypoints
- Way point text
- Persons onboard
- Height over keel
When select the navigation status, following list can be select.
- Under way using engine
- At anchor
- Not under command
- Restricted maneuverability
- Constrained by her draught
- Moored
- Aground
- Engaged in fishing
- Underway sailing
- Reserved for HSC
- Reserved for wig
- Not defined
Then after desire data of destination, ETA, draught, cargo status, person onboard, height over keel also can put under voyage static data menu.
2) Message
Select “message” by Joy stick and press, then following items will appear on screen.
- Edit and TX
- TX Tray
- RX Tray
- Interrogation
- Long range
When select Edit and TX by Joy stick and press following item will appear on screen.
- Format
- Category
- Function
- Reply
- CH
- Number of Retry
When would like to send message to individual or all ships as desire by user, when want to send to all ships, select “broad cast” and require individually the vessel, select “Address” at format item then select category “routine” or “safety”.Select “routine” is normal message and “safety” is safety message.
3. MAINTENANCE AND INSEPCTION OF AIS
1) General Maintenance and Inspection
|
No |
Item |
Maintenance and Inspection |
|
1 |
Cleaning |
Gently clean the surface of the panel, knobs, switches, and cover with soft cloth or silicon oil. No oil is needed because this unit has no moving mechanism inside. |
|
2 |
Looseness of part |
Inspect for looseness and correctly tighten the screws, nuts, knobs, switches and connectors. |
|
3 |
Fuse |
When checking and replacing the fuse, be sure the power is off. If the power source fuse is blown, be sure to inspect the cause before replacing the blown fuse with a new one |
2) Periodic Inspection
Self Diagnosis
- When Self Diagnosis is selected from maintenance menu, Self Diagnosis screen appears.
- Initially, the cursor is on 1.TRANSPONDER.
- And the jog dial is pressed, the cursor moves to the right hand of “.” As TEST ALL.
- Turn the Jog Dial and displayed item changes as.
- [TEST ALL -> CONTROL -> INT GPS -> PLL LOCK -> LOOP TEST(LOOP TEST2) -> PS -> TEST ALL. ]
- Push Jog Dial and confirm the selection. After the confirmation the cursor moves down to ENT.
- Turn the Jog Dial and the displayed item changes as:
- ENT -> CANCEL -> ENT
SBM (Shore Based Maintenance)
- Every 1 year, AIS should be maintenanced by Shore Engineer according to SBM.
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