Simrad GC80 Compact MK2 User manual

ENGLISH
GC80/85 Dual MK2
User Manual
www.navico-commercial.com

PREFACE
988-12720-002 ii
Document history
Rev. 001 First issue.
Rev. 002 Added trademark section, disclaimer, and copyright section.
Added section about Master compass power switch.

Simrad GC80/85 Dual MK2 Gyro Compass
iii 988-12720-002
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PREFACE
988-12720-002 iv
1PREFACE

Simrad GC80/85 Dual MK2 Gyro Compass
v 988-12720-002
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 © 2018 Navico Holding AS.
1.4 Trademarks
Navico® is a registered trademark of Navico Holding AS.
Simrad® is used by license from Kongsberg.

PREFACE
988-12720-002 vi
1.5 About this manual
Intended audience
This manual is intended as a reference guide for installing, operating and
maintaining the Simrad GC80/85 Expanded MK2 Gyro compass.
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. SET button, DISP button, GYRO
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 for warning 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.

Simrad GC80/85 Dual MK2 Gyro Compass
vii 988-12720-002
This manual is divided into the following sections:
1. System overview
An overview of the GC80/85 Dual Gyro system and its components.
2. User interface
An overview of GC80/85 Dual MK2 Control unit and the user interface.
3. Operation
Main operating procedures for using the GC80/85 Dual MK2 Gyro compass.
4. Maintenance
Simple maintenance procedures that should be performed by the system operator, together
with a complete procedure for how to replace the Sensitive element and fuses.
5. Installation
Mechanical installation, cable connection, and software configuration for the GC80/85 Dual
Gyro system.
6. Advanced settings
A description of parameters that can be entered or changed in the Extension menu.
7. Technical specifications
Specifications for the system and for all separate units in the GC80/85 Dual Gyro system.
8. Drawings
Dimensional drawings and wiring diagrams for the GC80/85 Dual Gyro system.
9. Spare part list
List of all standard and optional units that are used in the GC80 and GC85 Dual Gyro systems.
10. Terminal layout
List of all terminal pins and terminal labelling with details on the GTERM-A board, the DTERM-A
board, the CTERM board and the BTERM board in the GC80/85 Dual MK2 Control unit.
11.DIP switch settings
Drawings and references of jumpers and DIP switches for the different printed circuits boards in
the Dual MK2 Control 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.

CONTENTS
988-12720-002 viii
Contents
1PREFACE...................................................................................................................... IV
1.1 Compliance statement ............................................................................................................. v
1.2 Disclaimer...................................................................................................................................... v
Governing language ........................................................................................................ v
1.3 Copyright....................................................................................................................................... v
1.4 Trademarks ................................................................................................................................... v
1.5 About this manual.....................................................................................................................vi
Intended audience........................................................................................................... vi
Important text conventions.......................................................................................... vi
2SYSTEM OVERVIEW......................................................................................................1
2.1 Introduction.................................................................................................................................. 2
2.2 Precautions in use ......................................................................................................................2
2.3 System components..................................................................................................................3
2.4 Bearing repeaters........................................................................................................................3
3USER INTERFACE ..........................................................................................................6
3.1 General ...........................................................................................................................................7
3.2 Master compass control panels............................................................................................. 7
3.3 Change over panel.....................................................................................................................9
4OPERATION.................................................................................................................12
4.1 General .........................................................................................................................................13
4.2 System Start-up and Shut-down.........................................................................................13
Start-Up procedure for each Gyro compass ..........................................................13
Turning a Gyro compass OFF ......................................................................................14
Starting and stopping the Dual function................................................................15
4.3 Adjusting display illumination and contrast...................................................................16
Display illumination in control panels .....................................................................16
Display contrast in Change over panel....................................................................16
Automatically turn OFF the light in the Change over panel............................17
4.4 Display present settings for each compass.....................................................................18
Displaying settings with no external sensor connected...................................18
Displaying settings with external sensor connected .........................................19
4.5 Confirming present settings for each compass.............................................................20
True bearing......................................................................................................................20

Simrad GC80/85 Dual MK2 Gyro Compass
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Latitude...............................................................................................................................20
Speed...................................................................................................................................21
4.6 Pendulum function ..................................................................................................................23
4.7 Selecting active compass.......................................................................................................24
4.8 Alarm messages ........................................................................................................................25
Alarm messages on the compass control panels.................................................25
Alarm messages on the Change over panel..........................................................26
Acknowledging an alarm..............................................................................................26
Central Alarm Panel........................................................................................................27
BAMS....................................................................................................................................27
5MAINTENANCE ...........................................................................................................29
5.1 General .........................................................................................................................................30
5.2 Precautions .................................................................................................................................30
5.3 Cleaning the operator panels and the cabinet surface...............................................30
5.4 Checking the connectors.......................................................................................................30
5.5 Checking mechanical installation.......................................................................................30
5.6 Preventive maintenance intervals......................................................................................31
5.7 Replacing the Sensitive element.........................................................................................31
Mechanical installation .................................................................................................31
Verifying the element’s tilt angle...............................................................................34
Parameter updates .........................................................................................................35
Balancing the Horizontal ring .....................................................................................36
Adjusting the Rotor balance........................................................................................37
5.8 Replacing the Fuses.................................................................................................................38
Master compass ...............................................................................................................38
GC80/85 Dual MK2 Control unit.................................................................................38
6INSTALLATION............................................................................................................42
6.1 Unpacking and handling .......................................................................................................43
6.2 Mechanical installation...........................................................................................................43
Control unit........................................................................................................................43
Master compass ...............................................................................................................46
6.3 Cabling .........................................................................................................................................47
Power supply ....................................................................................................................48
6.4 Grounding the units ................................................................................................................49
6.5 DIP switch and jumper settings...........................................................................................49