Search and Rescue (SAR)
AIS transponders for aircraft installation.
Airborne AIS transponders greatly
enhances surveillance of large areas. The localisation and identification
of all AIS equipped vessels greatly increases national security,
environmental protection, and the possibility of rescuing vessels
in distress. AIS-equipped aircraft, with their high speed and
extreme VHF coverage, are well suited to
be used in SAR operations.
The SOTDMA technology used in the AIS transponder broadcasts and
receives information about all AIS equipped vessels within VHF
coverage. This information includes position, identity, course
and speed over ground, heading and rate of turn as well as navigational
status and the destination of the ship. The information received
is easily plotted on an electronic chart display system. This
gives a surveillance capability that was not possible prior to
AIS. AIS information on draught, type of cargo and destination
is also useful in rescue operations.
The airborne AIS transponder is the result of our extensive
experience of avionics, and is designed and produced to the
same high demands as our VDL4000 avionic transponders.
Configuration and interfaces
The airborne AIS transponder, with its internal
GPS, connects
to power supply, VHF and GPS antennas and to a laptop with
our confi guration software. The same laptop or a CDTI can
also be running an electronic chart system to display targets
received by the airborne AIS transponder.
Technical data
| GENERAL-TECHNICAL
DATA |
| Power requirements |
21.6-31.2 VDC |
| Environmental |
| IEC 60945 |
Protected installation |
| Electrical
Interfaces |
| External Display |
IEC 61162-2 |
| Transponder
Interfaces |
| GNSS Antenna |
Type TNC, jack |
| VHF Antenna |
Type N, jack |
| Physical
Characteristics: Transponder |
| Cooling |
Not required |
| Size (W x H x L) |
175 x 81 x 276 mm |
| Weight |
3.9 kg |
| Transmitter |
| Baud rate |
9600 bps |
| Carrier power (adjustable) |
33 and 41 dBm (2 and 12.5W) 50Ohm
load |
| Channel selection time |
< 26 ms |
| Channel spacing |
12.5 and 25 kHz |
| Modulation scheme |
GMSK (AIS TDMA ) / GFSK (DSC) |
| Number of transmitters |
1 |
| Tuning range |
156.025 –162.025 MHz |
| TX to RX turnaround time |
< 1 ms |
| Receiver |
| Number of receivers |
3 (2 AIS TDMA, 1 DSC) |
| Channel spacing |
12.5 and 25 kHz |
| Sensitivity, 20% MER |
< -107 dBm AIS for 25 kHz,
< -98 dBm AIS 12.5 kHz channel |
| Tuning range |
156.025 - 162.025 MHz |
| GNSS
Receiver |
| GNSS receiver |
12 parallel channels |
| DGNSS support |
Yes |
| Applicable
Standards |
| IPC-A-610 (Manufacturing) |
|
| ITU-R M.1371-1, IEC
61993-2, IEC 60945, IEC 61162-1/2 |
| RTCA/DO 178B (SW development) |
