Equipment Overview; Functions; Features - JRC JHS-770S Instruction Manual

1.1

Functions

This equipment includes VHF radiotelephone, Class-A DSC and DSC watchkeeping receiver
required as the Global Maritime Distress and Safety System (GMDSS). It is designed as a
separated transceiver and small, lightweight controller(s) for easy installation not only in
international passenger ships and freight ships of 300 tons or more, but also conventional ships of
less than 300 tons.
It has the radiotelephone, the DSC communication functions, received voice recording and
playback function, and self-diagnosis function with simple operation using a dedicated key.
Additionally, it offers such as public address function using an external speaker, intercom function
for communication between controllers, and the DSC calling function using an automatic
identification system (AIS) information.
1.2

Features

● Compliant with the ITU Radio Regulations, the IMO performance standards, and the ITU-R
recommendations.
● Contains all channels specified in the ITU Radio Regulations.
● In addition to channels specified in the ITU Radio Regulations, this equipment also provides
USA, Canada, European inland waterway, and weather channels. It also allows the use of
up to 200 private channels.
● Contains ATIS (Automatic Transmitter Identification System) function for the inland waterway
channels.
● Separately designed transceiver and controller enable easy installation in limited or difficult
spaces.
● A semi-transmissive LCD with a wide viewing angle features easily viewable even when with
straight light or backlit and allows it to install variety positions.
● The backlights of the LCD and operation keys are fully adjustable, preventing interference
with night watch keeping.
● The DSC is very easy to operate, especially a routine call, which can be sent by pressing the
dedicated routine call key and selecting address only. Additionally prepared a dedicated
menu for DSC safety test calling to make a radio communication inspection simple.
● When in distress, the DSC can send the distress message with the expanded position data
containing the digits up to 1/10000 of minutes for both latitude and longitude to make search
and rescue operation by the RCC easier.
● The received voice recording and playback function enables later confirmation or temporary
saving of communications.
● An advanced digital audio amplifier with a built-in loud speaker provides 5W
● A dedicated self-diagnosis key makes maintenance and inspection simple.
● Besides printers and GPS, other peripherals such as the AIS, the VDR, and/or remote
maintenance systems (RMS) can be connected to this equipment.

1. EQUIPMENT OVERVIEW

Equipment Overview
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1-1