| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-242-14
0008 00
SINCGARS Radio
The SINCGARS radio provides jam resistant radio transmissions between the LCM-8 Mod 2 and other SINCGARS radios.
The SINCGARS radio is equipped with an integrated COMSEC program for secure communication. The SINCGARS radio
is powered by the vessel's 24 Vdc power system through the command and control distribution box, located in the accommo-
dation module.
Data Modem
A SEA 3000 radio telex modem is provided to allow the data terminal to send and receive data via the SSB radio. The
modem receives 24 Vdc power from the SSB radio.
EMERGENCY COMMUNICATION SYSTEMS
General
Several communication systems aboard the LCM-8 Mod 2 provide communication capability in various emergency situa-
tions. These systems include the DSC radios, watch receiver, EPIRB, SART, and survival radio.
DSC Radios
The DSC feature of the VHF/FM and SSB radios permits the LCM-8 Mod 2 to both send and receive distress signals. This
feature is explained in the Pilothouse VHF/FM Radio and SSB radio paragraphs in this work package.
Watch Receiver
The watch receiver can monitor all six SSB distress frequencies looking for a distress signal. Once a signal is received, the
receiver sounds an alert and can print a report if desired.
EPIRB
A SATFIND-406 EPIRB is installed on the LCM-8 Mod 2. When activated, the EPIRB sends out a distress signal at
406.025 MHz and at 121.5 MHz. The 406.025 MHz signal is picked up by satellites and relayed to a ground station. By the
process of triangulation the EPIRB's position can be positively determined. The 406.025 signal contains, among other
coded information, the unique identification number of the EPIRB which allows identification of the vessel. The 121.5
MHz signal is primarily used by SAR (Search and Rescue) forces as a homing signal. The EPIRB also contains a strobe light
to aid in visual location of the unit.
The EPIRB is battery operated and mounted in a "float free" mount located on the accommodation ladder bulkhead, star-
board. Should the LCM-8 Mod 2 sink, the "float free" mount permits the EPIRB to float free from the vessel. The EPIRB
may be activated automatically or manually. Automatic activation occurs when the EPIRB is out of its bracket and afloat in
the water. Manual activation is via a switch on the EPIRB.
SART
Two SARTs are installed on the LCM-8 Mod 2. One is located in the pilothouse and the other near the accommodation
module door. The SART is designed to be carried off the LCM-8 Mod 2 and onto a life raft in the event of an emergency.
The SART provides location information to marine navigation and search X-band radar in the event of distress. When
activated, the transponder maintains "standby" mode until interrogated by radar. Each time the transponder receives a radar
pulse, it transmits a series of 12 pulses in response. On search radar, 12 equally spaced arcs are created, lined up behind the
original target echo. This clearly differentiates the SART from other targets and sea clutter.
0008 00-5
|
||
|
||
