FELCOM 15 - Yachtronics

LRIT COMPLIANCE
Notes on the LRIT system
• Power the equipment and keep it logged in at all times except for special occasions
such as when the ship is dry-docked for repairs. Position information is automatically
sent at fixed intervals, thus no operation is required. However, keep the equipment in a
ready state to received commands from the LRIT data center. Combined use for routine
messages, distress messages and SSAS (Ship Security Alert System) is possible.
• The source of position data for this equipment can be its internal GPS receiver or
external GNSS (Global Navigation Satellite System) equipment. For GNSS equipment,
interface directly to the shipborne global navigation satellite system equipment.
• If external GPS equipment is used, set it to use WGS84 datum. Further, the output
sentences should minimally be as follows:
- Time data input: ZDA
- Position data input: RMC or GGA and VTG (pair)
• This equipment and external GNSS equipment must be powered in the following
manner.
- If the above equipment is to be used as a GMDSS device also, connect them to an
auxiliary power source (radio communications battery).
- If the above equipment will not be used as a GMDSS device, connect them to both
main and emergency power sources (via AC-DC power unit PR-240).
• If an error message appears, take the necessary measures to restore normal operation
as soon as possible. Shown below are representative alarms.
- WARNING: External NAV equipment failure.
Position data is not correctly input from the external GNSS equipment. Check the
GNSS equipment and the wiring between it and the FELCOM.
- WARNING: Internal GPS UNIT failure.
Position data is not correctly input from the internal GPS receiver. If this alarm occurs
frequently, have the set checked.
- WARNING: Synchronization loss. Please check the current Ocean Region. -
- WARNING: BBER over 80%. Scanning NCS start manually.
Problem with receiving the Inmarsat-C signal. Check if the current sea area is
suitable for your position. If it is not, change the sea area. If the area is suitable and
the alarm continues, check the antenna and antenna cable. Request service if the
problem persists.
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