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
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PREFACE
988-12720-002 iv
1PREFACE

Simrad GC80/85 Dual MK2 Gyro Compass
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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
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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

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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

CONTENTS
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Activating the GC80 or GC85 Control unit .............................................................49
Activating an external heading sensor....................................................................51
HDT/THS .............................................................................................................................54
Activating the pendulum function ...........................................................................55
Activating external/internal reset of external/internal buzzer alarm...........57
6.6 Installing the Sensitive elements ........................................................................................58
Verifying the element’s tilt angle...............................................................................60
6.7 System start-up and software configuration..................................................................62
System Start-up for each Gyro compass.................................................................62
6.8 Balancing the Horizontal ring ..............................................................................................66
Adjusting True heading ................................................................................................66
6.9 Configuring the Dual function.............................................................................................67
Setting the heading difference alarm......................................................................68
7ADVANCED SETTINGS................................................................................................70
7.1 General .........................................................................................................................................71
7.2 Using the Extension menu ....................................................................................................71
7.3 The Extension menu overview.............................................................................................72
8TECHNICAL SPECIFICATIONS.....................................................................................78
8.1 Accuracy.......................................................................................................................................79
8.2 General specifications.............................................................................................................79
8.3 Input specifications..................................................................................................................80
8.4 Output specifications..............................................................................................................82
8.5 Physical Dimensions................................................................................................................84
GC80/85 Master compass.............................................................................................84
GC80/85 Dual MK2 Control unit.................................................................................84
8.6Power ............................................................................................................................................84
GC80/85 Master compass.............................................................................................84
GC80/85 Dual MK2 Control unit.................................................................................84
8.7 Environmental Specifications...............................................................................................85
GC80/85 Master compass.............................................................................................85
GC80/85 Dual MK2 Control unit.................................................................................85
9DRAWINGS..................................................................................................................87
9.1 Drawings included ...................................................................................................................88
10 SPARE PART LIST ........................................................................................................96
10.1 GC80 Dual Gyro system..........................................................................................................97

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10.2 GC85 Dual Gyro system..........................................................................................................97
10.3 GC80/85 Optional equipment, Dual system...................................................................98
11 TERMINAL LAYOUT ..................................................................................................100
11.1 GTERM-A board ...................................................................................................................... 101
TB1 ..................................................................................................................................... 101
TB2 ..................................................................................................................................... 104
11.2 DTERM-A board ...................................................................................................................... 107
TB21A................................................................................................................................ 107
TB21B ................................................................................................................................ 108
TB21C................................................................................................................................ 108
TB21D................................................................................................................................ 109
11.3 CTERM board........................................................................................................................... 110
TB101 ................................................................................................................................ 110
TB102 ................................................................................................................................ 110
TB103 ................................................................................................................................ 110
11.4 BTERM board ........................................................................................................................... 111
TB105 ................................................................................................................................ 111
TB106 ................................................................................................................................ 111
TB107 ................................................................................................................................ 111
12 DIP SWITCH SETTINGS .............................................................................................113
12.1 General ...................................................................................................................................... 114
12.2 GPOWER board 1 and 2 ....................................................................................................... 115
Jumper settings on GPOWER boards.................................................................... 115
12.3 GTERM-A board ...................................................................................................................... 116
Jumper settings on GTERM-A board ..................................................................... 116
12.4SCC board 1 and 2 ................................................................................................................. 117
DIP switch settings on SCC boards ........................................................................ 117
Jumper settings on SCC boards .............................................................................. 119
12.5 SCOIF board............................................................................................................................. 121
DIP switch settings on SCOIF board ...................................................................... 121
Jumper settings on SCOIF board............................................................................ 122
12.6 PCC board................................................................................................................................. 129
DIP switch settings on PCC board .......................................................................... 130
Jumper settings on PCC board................................................................................ 130
12.7 GPANEL-A board .................................................................................................................... 131
DIP switch settings on GPANEL-A board ............................................................. 131

CONTENTS
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13 ALARM MESSAGES AND CORRECTIVE ACTIONS ....................................................133
13.1 The alarm system................................................................................................................... 134
13.2 Fault finding ............................................................................................................................ 134
Master compass running stop function ............................................................... 135
13.3 Complete alarm code list.................................................................................................... 136
Alarms generated by the Dual system.................................................................. 138
BAMS complete alarm code list............................................................................... 139
Alarm Priority list .......................................................................................................... 140

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SYSTEM OVERVIEW
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2SYSTEM OVERVIEW
This section provides an overview of the GC80/85 Dual Gyro systems and
their components.

Simrad GC80/85 Dual MK2 Gyro Compass
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2.1 Introduction
GC80/85 Dual Gyro systems have been designed for any size of vessels
which requires more than 1 Gyro system. The system includes 1 common
Control unit, from which each Gyro system may be operated individually or
as 1 Dual system.
A GC80/85 Dual Gyro system enhances the navigational capabilities and
reliability. It eliminates the inconvenience and limitations of magnetic
compasses, and provides a variety of electrical outputs to supply accurate
and consistent heading information to other navigational equipment.
GC80 standard and GC85 high speed Dual Gyro systems have different
Sensitive elements, but use the same GC80/85 Dual MK2 Control unit. The
systems are identified by divergent DIP switch settings in Master compass
and in the Control unit.
Note!
A GC80 or GC85 system is identified by the labelling on top of the Master
compass’ case as shown in the figure below.
The labelling on the Control unit is identical for both Gyro systems.
SIMRAD GC85
BOW
2.2 Precautions in use
The GC80/85 Dual Gyro system 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 Gyro compass. If this
happens, any external equipment depending on the bearing output from
GC80/85 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 Gyro
compass.
-Perform daily checks to maintain normal system operation. Refer
MAINTENANCE, page 29 onwards.

SYSTEM OVERVIEW
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-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.
-If any alarm is generated, verify the reason for the alarm.
2.3 System components
A GC80/85 Dual Gyro system includes the following units:
-Master compass 1 & 2 with Sensitive elements
-Dual MK2 Control unit
Note! For details, refer TECHNICAL SPECIFICATIONS, page 78.
2.4 Bearing repeaters
GC80 and GC85 output 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 GC80/85.
The following serial signals may be selected:
Lo speed: IEC61162-1 ed.4 (4800 and 38400 baud possible)
High speed: 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.

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For connection of repeaters, refer to the wiring diagrams from page 88
onwards.

SYSTEM OVERVIEW
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Simrad GC80/85 Dual MK2 Gyro Compass
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3USER INTERFACE
This section gives an overview of the GC80/85 Dual MK2 Control unit and
the user interface.