L3 Technologies AISA1 Manual Do Utilizador

The Officer of the Watch must approve the Long Range reply when in MANUAL
mode, by a means of pressing a keyboard  button on the L-3 ProTec before the reply
is performed.

The Long Range reply, when in EXT APPL mode, is made by the L-3 ProTec upon
reception of confirmation / acknowledgement from the external application via the
high-speed ports. The external application acknowledges the interrogation by return-
ing the LRF sentence (updated with reply information).

The input data and formats are in the form of two Long Range interrogation sen-
tences, LRI and LRF, refer to Table 1–5.

The LRI -sentence contains the information needed to determine if a reply

needs to be constructed.

The LRF-sentence identifies the information items that are being re-

quested. Details of each sentence can be found in IEC 61162-1.

Long Range Interrogation
Type of request:
- Geographic area request
- AIS transponder request

LRI - Long Range Interrogation

Long Range Function identification
Requestor MMSI and Name
Request for:
- Ship’s name, call sign and IMO number (A)
- Date and time of message composition (B)
- Position (C)
- Course over ground (E)
- Speed over ground (F)
- Destination and ETA (I)
- Draught (O)
- Ship / Cargo (P)
- Ship’s length, breadth and type (U)
- Number of persons on board (W)

LRF - Long Range Function