Simrad GC80/85 Double System Controller
988-12721-001
11
2 SYSTEM OVERVIEW
This section provides an overview of the GC80/85 Double System
Controller unit and its components.
2.1 Introduction
The GC80/85 Double System Controller unit has been designed for any size
of vessels to enhance the navigational capabilities and reliability. The
system controller outputs the true heading of the selected gyrocompass
and an optional heading sensor.
This system is developed based on the international standards, which are
as follows:
- ISO 8728
Ships and marine technology – Marine gyrocompasses.
- IEC Standard 60945 Ed.4
Maritime navigation and radio communication equipment and
systems - General requirements - Methods of testing and required
test results.
- IEC Standard 61162-1 Ed.4
Maritime navigation and radio communication equipment and
systems, digital interface.
- IEC Standard 61162-2 Ed.1
Maritime navigation and radio communication equipment and
systems, digital Interface.
Single talker and multiple listeners, high speed transmission.
- IEC 62288 Ed.1
Presentation of navigation-related information on shipborne
navigational displays – General requirements – Methods of testing.
The new Double System Controller unit is developed to meet the
requirements of the NAUT-OC/NAUT-AW with the new Dual gyrocompass
system.
These requirements are:
1 Two-way communication feature between the Dual gyrocompass
system and BAMS (Bridge alarm management system) for alarm
transfer and alarm acknowledgement.
2 No interruption in heading information when having any trouble in
either of the two gyrocompass systems. Note that the current
gyrocompass system has common interface hardware for signal
input/output.
3 Backup requirement for speed error correction and abnormal
conditions with 2 inputs of GNSS (position) and SDME (speed).
4 No jumping when changing heading information among 2 or more
heading sensors.
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