Simrad GC80 EXPANDED User manual

ENGLISH
GC80/85
Double System Controller
User Manual
www.navico-commercial.com

Simrad GC80/85 Double System Controller
988-12721-001 3
Document history
Rev. 001 First review

Simrad GC80/85 Double System Controller
4988-12721-001
1PREFACE
1.1 Compliance statement
Navico declare under our sole responsibility that the GC80/85 conform
with the requirements of:
•The European Council Directive 2014/90/EU on Marine Equipment
modified by Commission Implementing Regulation (EU)
2019/1397 - Wheelmark.
All compliance documents are available in the product’s section at the
following website: www.navico.com/commercial.
1.2 Disclaimer
As Navico is continuously improving this product, we retain the right to
make changes to the product at any time which may not be reflected in
this version of the manual.
Please contact your nearest distributor if you require any further
assistance.
It is the owner’s sole responsibility to install and use the equipment in a
manner that will not cause accidents, personal injury or property damage.
The user of this product is solely responsible for observing maritime safety
practices.
NAVICO HOLDING AS AND ITS SUBSIDIARIES, BRANCHES AND AFFILIATES
DISCLAIM ALL LIABILITY FOR ANY USE OF THIS PRODUCT IN A WAY THAT
MAY CAUSE ACCIDENTS, DAMAGE OR THAT MAY VIOLATE THE LAW.
This manual represents the product as at the time of printing. Navico
Holding AS and its subsidiaries, branches and affiliates reserve the right to
make changes to specifications without notice.
Governing language
This statement, any instruction manuals, user guides and other information
relating to the product (Documentation) may be translated to, or has been
translated from, another language (Translation). In the event of any conflict
between any Translation of the Documentation, the English language
version of the Documentation will be the official version of the
Documentation.
1.3 Copyright
Copyright © 2021 Navico Holding AS.
1.4 Trademarks
Navico® is a registered trademark of Navico Holding AS.
Simrad® is used by license from Kongsberg.

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1.5 About this manual
Intended audience
This manual is intended as a reference guide for installing, operating and
maintaining the GC80/85 Double System Controller unit.
The manual assumes that the operator is a qualified ship officer, or is
under supervision of a qualified person.
Important text conventions
In this manual, references to buttons on the operator panels are written in
boldface, but in a different text style (e.g. MENU button, SET/ENT button,
HDG button).
Important text that requires special attention from the reader is
emphasized as follows:
Note! Used to draw the reader’s attention to a comment or some important
information.
Caution Used to warn the reader that a risk of damage to the equipment exists
if care is not exercised.
WARNING Used when it is necessary to warn personnel that a risk of
injury or death exists if care is not exercised.

Contents
6 988-12721-001
This manual is divided into the following sections:
1. Preface
2. System overview
An overview of the GC80/85 Double System Controller unit and its components.
3. User interface
An overview of GC80/85 Double System Controller unit and the user interface.
4. Operation
Main operating procedures for using the GC80/85 Double System Controller unit.
5. Maintenance
Simple maintenance procedures that should be performed by the system operator.
6. Installation
Mechanical installation, cable connection, and software configuration for the GC80/85 Double
System Controller unit.
7. Technical specifications
Specifications for the system and for all separate units in the GC80/85 Double System Controller unit.
8. Drawings
Dimensional drawings and wiring diagrams for the GC80/85 Double System Controller unit.
9. Part list
List of all standard and optional units that are used in the GC80 and GC85 Double System Controller
unit.
10. Terminal layout
List of all terminal pins and terminal labelling with details on GTERM-A board in the GC80/85 Double
System Controller unit.
11. DIP switch settings
Drawings and references of jumpers and DIP switches for the different printed circuits boards in the
Double System Controller unit.
12. Alarm messages and corrective actions
A description of how system errors are indicated and corrective actions that can be performed by the
operator.
13. Troubleshooting

Contents
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Contents
1PREFACE............................................................................................. 4
1.1 Compliance statement.........................................................4
1.2 Disclaimer .........................................................................4
Governing language.......................................................4
1.3 Copyright ..........................................................................4
1.4 Trademarks .......................................................................4
1.5 About this manual ..............................................................5
Intended audience.........................................................5
Important text conventions.............................................5
2SYSTEM OVERVIEW .......................................................................... 11
2.1 Introduction.....................................................................11
2.2 Precautions in use ............................................................12
2.3 System components..........................................................12
2.4 Bearing repeaters.............................................................14
3USER INTERFACE.............................................................................. 15
3.1 General...........................................................................15
3.2 Control panel ...................................................................15
Heading sensor indicators.............................................15
4OPERATION ...................................................................................... 17
4.1 System start-up and shut-down..........................................17
Power ON/OFF ............................................................17
4.2 Display ...........................................................................18
Start screen ...............................................................18
Display menu list ........................................................18
Main screen................................................................19
Screen when the gyrocompass is settling........................19
Screen when an Alert occurs.........................................20
4.3 Select heading sensor .......................................................20
Sensor selection..........................................................20
4.4 Adjust display illumination and display test ..........................20
Adjust display brightness..............................................20
Display test................................................................21
4.5 Alarm messages...............................................................21

Contents
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Central alarm panel.....................................................21
BAMS ........................................................................21
5MAINTENANCE.................................................................................. 22
5.1 General...........................................................................22
5.2 Precautions......................................................................22
5.3 Cleaning the operator panels and the cabinet surface ............23
5.4 Check warning label..........................................................23
5.5 Checking the connectors....................................................23
5.6 Checking mechanical installation.........................................23
5.7 Preventive maintenance intervals........................................23
5.8 Replacing the fuses...........................................................24
GC80/85 Double System Controller unit .........................24
5.9 Storage and disposal methods............................................26
5.10 Heading sensor parameter check ........................................26
6INSTALLATION ................................................................................. 28
6.1 Unpacking and handling ....................................................28
6.2 Mechanical installation ......................................................28
Control unit................................................................28
6.3 Cabling ...........................................................................29
Power supply..............................................................30
6.4 Grounding the unit............................................................30
6.5 DIP switch and jumper settings ..........................................30
Activating the GC80 or GC85 Double System Controller
unit...........................................................................30
6.6 Activating or deactivating the automatic switch.....................32
6.7 Expanded Control unit settings in a Double gyro system.........32
6.8 Parameter settings ...........................................................33
7TECHNICAL SPECIFICATIONS ........................................................... 34
7.1 General specifications .......................................................34
7.2 Input specifications...........................................................35
7.3 Output specifications.........................................................37
7.4 Physical dimensions..........................................................38
GC80/85 Double System Controller unit .........................38
7.5 Power .............................................................................38
GC80/85 Double System Controller unit .........................38

Contents
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7.6 Environmental specifications ..............................................39
GC80/85 Double System Controller unit .........................39
8DRAWINGS ....................................................................................... 40
8.1 Drawings included ............................................................40
9PART LIST......................................................................................... 47
9.1 GC80/85 Double System Controller unit...............................47
9.2 GC80/85 optional equipment, Double System Controller unit ..47
10 TERMINAL LAYOUT ........................................................................... 48
10.1 DGCT board.....................................................................48
TB1...........................................................................48
TB2...........................................................................48
TB3...........................................................................49
TB21 .........................................................................50
TB22 .........................................................................50
TB23 .........................................................................51
TB24 .........................................................................52
TB25 .........................................................................53
TB26 .........................................................................53
TB27 .........................................................................54
TB28 .........................................................................54
TB29 .........................................................................55
TB30 .........................................................................55
11 DIP SWITCH SETTINGS..................................................................... 56
11.1 Double System Controller unit............................................56
DGCIF board ..............................................................57
SCC boards ................................................................62
DGCT board................................................................66
12 ALERT MESSAGES AND CORRECTIVE ACTIONS ................................. 67
12.1 The alert system ..............................................................67
Alert display ...............................................................67
Display when an alert occurs.........................................67
Alert list.....................................................................68
Alert history ...............................................................68
12.2 Acknowledging an alert .....................................................69
Operation when an alert is activated ..............................69

Contents
10 988-12721-001
Check alert screen.......................................................71
Check alert list and alert history....................................71
12.3 Complete alarm code lists..................................................72
Alerts detected on Double.............................................72
Alert detected in GC80/85 Expanded No.1..............................74
Alert detected in GC80/85 Expanded No.2 ......................74
Alarm priority list ........................................................75
13 TROUBLESHOOTING ......................................................................... 77

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2SYSTEM 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:
1Two-way communication feature between the Dual gyrocompass
system and BAMS (Bridge alarm management system) for alarm
transfer and alarm acknowledgement.
2No 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.
3Backup requirement for speed error correction and abnormal
conditions with 2 inputs of GNSS (position) and SDME (speed).
4No jumping when changing heading information among 2 or more
heading sensors.

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5Heading information between sensors should be selected by
external serial command.
6Physical separation in the system should be achieved in all respects
as specified.
7Character size and other display features and indications should
meet the requirement of IEC22288.
8Dual serial output circuits should be installed.
9Gyrocompass should cover the performance requirement based on
the IMO performance standard up to latitude 75 deg.
The GC80/85 Double System Controller unit covers international
performance requirements (IEC61924) and notations specified by other
classification bodies.
2.2 Precautions in use
The GC80/85 Double System Controller unit displays and outputs bearing
information. Although the system continually checks for faults while the
system is running, failures or malfunctions may occur.
Any errors in input information will generate an alarm. These errors may
also cause large jumps in the output bearing from the gyrocompass. If this
happens, any external equipment depending on the bearing output from
GC80/85 Double System Controller unit should be operated manually or
switched to other bearing sensors.
To assure long time safe operation, the following precautions should be
taken:
-Assure that the operator is familiar with the use of the gyrocompass.
-Read the safety precautions in this manual.
-Perform daily checks to maintain normal system operation. Refer to
“MAINTENANCE”, page 22 onwards.
-Before taking any measures, check the navigational condition
around the vessel for safety and stop at non-dangerous sea areas.
-If any unusual behavior is observed during daily inspections, the
cause should be found and corrected. If necessary, the local Simrad
dealer should be contacted. Refer to www.navico-commercial.com
for a list of Certified Dealers and Distributors.
-If any alarm is generated, verify the reason for the alarm. Take
appropriate measures by following the directions in the alert list.
2.3 System components
The new Double system has been developed on the concept of 2 sets of
standard single gyrocompass systems having serial heading outputs with
the new system controller unit.
A GC80/85 Double System Controller unit includes the following units:

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Note! For details, refer to “TECHNICAL SPECIFICATIONS” on page 34.

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2.4 Bearing repeaters
The Double controller unit outputs step and serial signals used for
repeaters. Even when the emergency power supply is used, the connected
repeaters will be powered by the repeater backup function included in the
Double controller unit.
The following serial signals may be selected:
Low speed (GC80): IEC61162-1 ed.4 (4800 and 38400 baud possible)
High speed (GC85):IEC61162-2 ed.1 (38400 baud possible)
Note! A proprietary Tokimec serial signal may also be available, but this is normally
not used.
These signals may be set separately for each circuit.
For connection of repeaters, refer to the wiring diagrams from page 40
onwards.

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3USER INTERFACE
This section gives an overview of the GC80/85 Double System Controller
unit and the user interface.
3.1 General
The Double System Controller unit includes 1 control panel.
3.2 Control panel
The control panel includes the buttons described on the following pages.
Heading sensor indicators
NO.1 indicator
Indicates the status of the NO.1 gyrocompass:
-Green LED: Normal operation
-Red LED: Error
-OFF: Not installed
Refer to “Select heading sensor” on page 20.
NO.2 indicator
Indicates the status of the NO.2 gyrocompass:
-Green LED: Normal operation
-Red LED: Error
-OFF: Not installed
Refer to “Select heading sensor” on page 20.

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EXT indicator
Not used.
▽/EXT key
Used to adjust the illumination and move the cursor down.
MENU/NO.1 key
Select to open the display menu list. Refer to “Display menu list” on page
18.
This key is also used to select the NO.1 gyrocompass as the primary
heading sensor. Press the MENU/NO.1 key and the HDG key
simultaneously.
Used to change data and input sources.
△/NO.2 key
Used to adjust the illumination and to move the cursor up.
This key is also used to select the NO.2 gyrocompass as the active heading
reference source.
Refer to “Select heading sensor” on page 20.
ACK key
Used to acknowledge alerts (buzzer stop).
SET/ENT key
Select to change the value. Select again to confirm the operation and
value.
HDG key
Used to change the primary heading sensor. Press simultaneously the HDG
key and the desired heading sensor button to change the primary heading
sensor.
Used to increase or decrease a parameter value.
Press both keys for lamp test and to set the display illumination as
described on page 21.
Alarm indicator
Used to indicate an alarm situation. Refer to “Alarm messages” on page 21.

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4OPERATION
This section describes the main operating procedures used when
operating the GC80/85 Double System Controller unit.
WARNING Malfunctions by system failure or improper actions by the
system operator may cause sea accidents.
Pay close attention to the system by understanding its limitations in
performance and characteristics.
Do not apply strong shocks to the display panel. The display is protected
with acrylic cover, but the inner display uses a thin glass panel.
4.1 System start-up and shut-down
A GC80/85 Double System Controller unit is usually left with power ON. If
the system has to be shut down and restarted, follow the procedures
described in the following sections.
Power ON/OFF
Power ON
1The two CG50/85 Expanded systems must be turned On or turned
On as described in the CG80/85 Expanded MK2 User manual. Then,
the two internal switches in the Double controller unit, SW101 and
SW102. SW101 will turn On power and signals from Gyro system
NO.1 and SW102 will turn On power and signals from Gyro system
NO.2.
2The start screen is displayed for 3 seconds.
3The true heading screen is displayed.

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Power OFF
When powering Off the system the internal switches SW101 (Gyro No.1)
and SW102 (Gyro No.2) can be turned to OFF. Power and signals from the
gyros will then be turned Off.
If gyros are to be stopped completely you must follow the stop procedure
explained in the GC80/85 Expanded MK2 User Manual.
4.2 Display
Start screen
Turn on NO.1 gyrocompass, NO.2 gyrocompass to start the unit. The start-
up screen is displayed for 3 seconds.
The unit name, model name, and software version are displayed on the
screen.
Display menu list
1Press MENU/NO.1 to open the display menu list in the upper left
corner of the screen.
Re-press MENU/NO.1 to close the menu.
Unit name
Product model
Software version

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Main screen
1Select <MAIN> in the display menu list.
2A list of the connected heading sensor(s) is displayed.
The true heading of the selected heading sensor is displayed
[SELECTED].
Screen when the gyrocompass is settling
1Select <MAIN> in the display menu list.
2When the gyrocompass is settling, [STANDBY] is displayed.
When NO.1 gyrocompass
is selected.
When NO.2 gyrocompass
is selected.

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Screen when an Alert occurs
4.3 Select heading sensor
Sensor selection
1The unit outputs the true heading of the selected gyrocompass.
-To select NO.1 gyrocompass, press the △/NO.1 key and the HDG
key simultaneously.
-To select NO.2 gyrocompass, press the △/NO.2 key and the HDG
key simultaneously.
4.4 Adjust display illumination and display test
Adjust display brightness
On the main screen:
Press △/NO.2: Up.
Press ▽/EXT: Down.
Press △/NO.2 key
+ HDG key
Press MENU/NO.1 key
+HDG key
Display when an alert
occurs. Refer to “ALERT
MESSAGES AND
CORRECTIVE ACTIONS” on
page 67.