Simrad GC80 Compact MK2 User manual

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

PREFACE
988-12718-003
Document history
Rev. 001 First issue.
Rev. 002 Added trademark section, disclaimer, and copyright section.
Added section about Master compass power switch.
Rev. 003 Updates to BAM conn. ext. cables, alarm code list, notes added.

Simrad GC80/85 Compact MK2 Gyro Compass
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PREFACE
988-12718-003 4
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-commercial.com
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.

Simrad GC80/85 Compact MK2 Gyro Compass
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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 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.

CONTENTS
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This manual is divided into the following sections:
1. Preface
2. System overview
An overview of the GC80/85 Compact Gyro system and its components.
3. User interface
An overview of the GC80 Compact MK2 Control unit and the user interface.
4. Operation
Main operating procedures for using the GC80/85 Compact MK2 Gyro compasses.
5. 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.
6. Installation
Mechanical installation, cable connection, and software configuration for the GC80/85
Compact Gyro system.
7. Advanced settings
A description of parameters that can be entered or changed in the Extension menu.
8. Technical specifications
Specifications for the system and for all separate units in the GC80/85 Compact Gyro system.
9. Drawings
Dimensional drawings and wiring diagrams for the GC80/85 Compact Gyro system.
10.Part list
List of all standard and optional units that are used in the GC80 and GC85 Compact Gyro
systems.
11. Terminal layout
List of all terminal pins and terminal labelling with details on PCBs in the GC80 Control unit.
12. DIP switch settings
Drawings and references of jumpers and DIP switches for the different printed circuits boards in
the Control unit.
13. Alarm messages and corrective actions
A description of how system errors are indicated and corrective actions that can be performed
by the operator.

Simrad GC80/85 Compact MK2 Gyro Compass
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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 ................................................................................................... 12
2.1 Introduction ................................................................... 12
2.2 Precautions in use ........................................................... 12
2.3 System components......................................................... 13
2.4 Bearing repeaters............................................................ 13
3USER INTERFACE........................................................................................................ 16
3.1 GC80 Compact MK2 Control unit ........................................ 16
4OPERATION................................................................................................................ 19
4.1 System start-up and shut-down......................................... 19
Start-up.................................................................... 19
Turning the Gyro compass OFF..................................... 20
4.2 Selecting active compass.................................................. 21
4.3 Adjusting dimming level ................................................... 21
4.4 Displaying present settings ............................................... 22
Displaying settings with no external sensor connected...... 22
Displaying settings with external sensor connected.......... 24
4.5 Confirming present settings .............................................. 25
True bearing.............................................................. 25
Latitude.................................................................... 25
Speed ...................................................................... 26
4.6 Pendulum function........................................................... 29
4.7 Alarm messages.............................................................. 30
Acknowledging an alarm.............................................. 31
Central Alarm Panel.................................................... 31

CONTENTS
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BAMS....................................................................... 31
5MAINTENANCE........................................................................................................... 33
5.1 General.......................................................................... 33
5.2 Precautions .................................................................... 33
5.3 Cleaning the operator panels and the cabinet surface............ 33
5.4 Checking the connectors................................................... 33
5.5 Checking mechanical installation........................................ 33
5.6 Preventive maintenance intervals....................................... 34
5.7 Replacing the Sensitive element......................................... 34
Mechanical installation ................................................ 34
Verifying the element’s tilt angle................................... 38
Parameter updates..................................................... 39
Balancing the Horizontal ring........................................ 40
Adjusting the Rotor balance ......................................... 41
5.8 Replacing the fuses.......................................................... 42
Master compass......................................................... 42
Compact MK2 Control unit ........................................... 42
Power supply unit (option)........................................... 44
6INSTALLATION........................................................................................................... 46
6.1 Unpacking and handling ................................................... 46
6.2 Mechanical installation...................................................... 46
Control unit............................................................... 47
Power supply unit (option)........................................... 49
Master compass......................................................... 50
6.3 Cabling.......................................................................... 51
6.4 Grounding the units ......................................................... 51
6.5 DIP switch and jumper settings.......................................... 51
Activating the GC80 or GC85 Control unit....................... 52
Activating an external heading sensor............................ 53
HDT/THS .................................................................. 54
Activating the pendulum function.................................. 55
Activating external/internal reset of external/internal buzzer
alarm....................................................................... 56
6.6 Installing the Sensitive element ......................................... 57
Verifying the element’s tilt angle................................... 59

Simrad GC80/85 Compact MK2 Gyro Compass
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6.7 System start-up and software configuration......................... 61
System start-up......................................................... 61
Configuring the Gyro system........................................ 62
Setting the Latitude input source .................................. 63
Setting the Speed input source..................................... 64
6.8 Balancing the Horizontal ring............................................. 65
Adjusting True heading ............................................... 66
7ADVANCED SETTINGS ............................................................................................... 68
7.1 General.......................................................................... 68
7.2 Using the Extension menu................................................. 68
7.3 The Extension menu overview ........................................... 70
8TECHNICAL SPECIFICATIONS.................................................................................... 76
8.1 Accuracy........................................................................ 76
8.2 General specifications....................................................... 76
8.3 Input specifications.......................................................... 77
8.4 Output Specifications ....................................................... 79
8.5 Physical dimensions ......................................................... 81
GC80 Master compass................................................. 81
GC80 Compact MK2 Control unit................................... 81
GC80 Power supply unit (option)................................... 81
8.6 Power............................................................................ 81
GC80/85 Master compass............................................ 81
GC80 Compact MK2 Control unit................................... 81
GC80 Power supply unit (option)................................... 81
8.7 Environmental specifications ............................................. 82
GC80/85 Master compass............................................ 82
GC80 Compact MK2 Control unit................................... 82
9DRAWINGS ................................................................................................................. 84
9.1 Drawings included ........................................................... 84
10 PART LIST ................................................................................................................... 92
10.1 GC80 Compact Gyro system.............................................. 92
10.2 GC85 Compact Gyro system.............................................. 92
10.3 GC80/85 Optional equipment, Compact system.................... 93

CONTENTS
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11 TERMINAL LAYOUT ................................................................................................... 95
11.1 ICNT board..................................................................... 95
TB1.......................................................................... 95
TB2.......................................................................... 98
TB3.......................................................................... 99
12 DIP SWITCH SETTINGS ............................................................................................ 101
12.1 Compact MK2 Control unit .............................................. 101
ICNT board ............................................................. 102
GPANEL-A board ...................................................... 105
13 ALARM MESSAGES AND CORRECTIVE ACTIONS ................................................... 110
13.1 The alarm system.......................................................... 110
13.2 Acknowledging an alarm................................................. 111
13.3 Fault finding ................................................................. 111
Main power failure.................................................... 111
Internal power failure in Control unit ........................... 112
Inverter malfunction................................................. 112
Zero cross failure ..................................................... 112
System communication failure.................................... 113
GPS communication or data malfunction ...................... 113
Internal communication error..................................... 114
External bearing sensor error..................................... 114
LOG (serial) communication or data malfunction ........... 114
Repeater error......................................................... 114
Failure when powering ON the Gyro compass................ 115
13.4 Complete alarm code list ................................................ 116
BAMS complete alarm code list................................... 118