JRC, JUE-87 Inmarsat C

JRC JUE‑87 Inmarsat‑C Terminal is a marine satellite communication system made by Japan Radio Co., Ltd. (JRC). It is widely used on ships as part of the GMDSS (Global Maritime Distress and Safety System) for global satellite messaging, safety alerts, and vessel monitoring.

Technical Specification

JRC JUE-87 Technical Specifications

General

System type: Inmarsat-C Mobile Earth Station (MES) – Class 2
Application: Satellite messaging, distress alert, EGC safety messages
Display: 10.4-inch color LCD
Resolution: 640 × 480 pixels (brightness about 450 cd/m²)

RF / Communication Specifications

Transmit frequency: 1626.5 – 1646.5 MHz
Receive frequency: 1537.0 – 1544.2 MHz
Channel spacing: 5 kHz
EIRP: 14 ±2 dBW (at 5° elevation angle)
G/T: −23.0 dB/K minimum
Modulation: BPSK (1200 symbols/sec)
Data rate: 600 bps (TX/RX)

Power Specifications

Power supply: 24 V DC (19.2 – 31.2 V)
Power consumption:
- Transmission: approx. 100 W
- Standby: approx. 15 W
Maximum system power: about 160 W (with printer and accessories)

Interfaces / Ports

LAN port: 1 × RJ-45
DTE serial port: 1
Keyboard port: 1
Printer port: 1
Serial maintenance port: 1
GPS input (NMEA): 1
External buzzer: up to 3 ports
Remote distress button: 2 ports
Security button (SSAS): up to 4 ports
Alarm outputs:
- Dry contact: 1
- NMEA alarm output: 1
AIS / alarm input (NMEA): 1

Antenna (EME)

Model: NAF-253GM
Antenna type: Helical
Radiation pattern: Hemisphere (omnidirectional)
Polarization: Right-hand circular

Environmental Conditions

Operating temperature:
- Antenna (EME): −35°C to +55°C
- Terminal (IME): −15°C to +55°C
Storage temperature: −40°C to +70°C
Humidity: 0–95% non-condensing
Wind resistance: up to 100 knots
Icing: up to 25 mm
Rain: up to 100 mm/hour