Sonardyne Lodestar User manual

Lodestar Hardware
Manual
Document Ref: UM-8084-
101
Issue: A– Rev
8
© Sonardyne International Limited 201
3
1
UM-8084-101
Lodestar
Hardware Manual
Head Office
Sonardyne International Limited
Blackbushe Business Park
Yateley, Hampshire
GU46 6GD United Kingdom
T. [phone]
F. [phone]
E. [e-mail]
www.sonardyne.com

Lodestar Hardware
Manual
Document Ref: UM-8084-
101
Issue: A– Rev
8
© Sonardyne International Limited 201
3
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Document History
Issue
Rev
Date
Comments
Section
Page
A
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
8
11 Jun 2010
04 Aug 2010
29 Mar 2011
27 Jun 2011
15 Sep 2011
1 Nov 2011
5 July 2012
19 Nov 2012
21 Jan 2013
First Issue
Extended firmware download
Modifications to drawings and specs
Doc license warning added. C2->E1
Updates for V2.03 firmware release
Fixed firmware upgrade instructions
Updates for PC Utility release
Updated formatting
Updating cable drawings for new versions.
Deletion of cable drawings.
All
6.1, 6.2
All
All
All
7.1
All
All
Appendix A
Appendix A
All
All
All
All
All
41
All
All
44 – 48;
50 – 59
49, 60
Copyright 2013 Sonardyne International Limited.
Blackbushe Business Park
Yateley, Hampshire GU46 6GD
United Kingdom
Tel: [phone]
Fax: [phone]
All rights reserved. No part of this document shall be reproduced, stored in a retrieval system or
transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, or translated
into any language without the written permission of Sonardyne International Limited.

Lodestar Hardware
Manual
Document Ref: UM-8084-
101
Issue: A– Rev
8
© Sonardyne International Limited 201
3
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Contents
Document History.................................................................................................................................... 2
Contents .................................................................................................................................................. 3
Figures .................................................................................................................................................... 4
Tables...................................................................................................................................................... 5
1U.S. Department of Commerce License......................................................................................... 6
2About This Manual.......................................................................................................................... 6
2.1 Purpose ...................................................................................................................................... 6
2.2 How this manual is arranged...................................................................................................... 6
3About Lodestar ............................................................................................................................... 8
3.1 Introduction................................................................................................................................. 8
3.2 Front panel features of the Surface Lodestar............................................................................. 9
3.3 Connectors of the Subsea Lodestar......................................................................................... 12
3.4 Operation.................................................................................................................................. 14
3.5 Warranty................................................................................................................................... 15
4Technical Specifications ............................................................................................................... 17
4.1 Introduction............................................................................................................................... 17
4.2 Physical .................................................................................................................................... 18
4.3 Electrical................................................................................................................................... 23
4.4 Environmental .......................................................................................................................... 23
4.5 Performance............................................................................................................................. 23
5Installation..................................................................................................................................... 25
5.1 Introduction............................................................................................................................... 25
5.2 Unpacking and inspection ........................................................................................................ 25
5.3 Installation location................................................................................................................... 26
5.4 Site preparation ........................................................................................................................ 27
5.5 Alignment ................................................................................................................................. 29
5.6 Connections ............................................................................................................................. 29
5.7 NMEA Connections to Listening Equipment ............................................................................ 30
6Troubleshooting............................................................................................................................ 31
6.1 Introduction............................................................................................................................... 31
6.2 Test Procedure......................................................................................................................... 31
6.3 Check List ................................................................................................................................ 33
6.4 General information and action to take .................................................................................... 33
6.5 Recovery Procedures............................................................................................................... 34
6.5.1 Lodestar Reset ................................................................................................................ 34
6.5.2 Restore Lodestar Factory Settings .................................................................................. 34
7Maintenance ................................................................................................................................. 36
7.1 Firmware Upgrade using the PC Utility .................................................................................... 36
8Technical Support......................................................................................................................... 40
8.1 Getting technical support.......................................................................................................... 40
8.1.1 Sonardyne 24-hour Emergency Helpline......................................................................... 40
8.2 Sonardyne Offices and Agents................................................................................................. 41
8.2.1 Sonardyne Office locations.............................................................................................. 41
Appendix A – Cable Drawings............................................................................................................... 43
Appendix B – Lodestar Reference Frame............................................................................................. 58

Lodestar Hardware
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Document Ref: UM-8084-
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Issue: A– Rev
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Figures
Figure 1 – Surface Lodestar – Front Panel ............................................................................................. 9
Figure 2 – Subsea Lodestar – End-cap Connections ........................................................................... 12
Figure 3 – Physical specifications – Surface Lodestar.......................................................................... 18
Figure 4 – Physical specifications – Surface Lodestar (continued)....................................................... 19
Figure 5 – Physical specifications – 1000 m Subsea Lodestar............................................................. 20
Figure 6 – Physical specifications – 3000 m Subsea Lodestar............................................................. 21
Figure 7 – Physical specifications – 5000 m Subsea Lodestar............................................................. 22
Figure 8 – Mounting arrangement – Surface Lodestar ......................................................................... 28
Figure 9 – Mounting arrangements – Subsea Lodestar........................................................................ 28
Figure 10 – Listener receiving circuit..................................................................................................... 30
Figure 11 – Lodestar test procedure ..................................................................................................... 32
Figure 12 – PC Utility Connection ......................................................................................................... 34
Figure 13 – PC Utility Connection ......................................................................................................... 36
Figure 14 – Sonardyne Office Locations ............................................................................................... 41
Figure 15 – Lodestar Surface Console Cable Tail – CPN 820-0054 .................................................... 43
Figure 16 – Lodestar Surface Console Test Cable – CPN 820-0057 ................................................... 44
Figure 17 – Lodestar Surface Comms Test Cable – CPN 820-0061.................................................... 45
Figure 18 – Lodestar Surface Transceiver Cable Tail – CPN 820-0062............................................... 46
Figure 19 – Lodestar Surface Transceiver Test Cable – CPN 820-0064 ............................................. 47
Figure 20 – Auxiliary Lemo Cable Assembly – CPN 820-6817............................................................. 48
Figure 21 – Gyro Power Cable – CPN 820-6828 .................................................................................. 49
Figure 22 – Lodestar Subsea Console Cable – CPN 820-0065............................................................ 50
Figure 23 – Lodestar Subsea Console Test Cable – CPN 820-0067 ................................................... 51
Figure 24 – Subsea Lodestar Comms C1 Cable – CPN 820-0068....................................................... 52
Figure 25 – Subsea Lodestar Comms C1 Test Cable – CPN 820-0070 .............................................. 53
Figure 26 – Subsea Lodestar Comms Ethernet Tail Cable – CPN 820-0071....................................... 54
Figure 27 – Subsea Lodestar Comms Ethernet Cable – CPN 820-0072.............................................. 55
Figure 28 – Subsea Lodestar Transceiver Cable Tail – CPN 820-0073 ............................................... 56
Figure 29 – Subsea Lodestar Transceiver Test Cable – CPN 820-0078.............................................. 57
Figure 30 – Lodestar Reference Frame ................................................................................................ 58

Lodestar Hardware
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Issue: A– Rev
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Tables
Table 2 – Battery and charge status LEDs............................................................................................ 11
Table 3 – Transceiver and data LEDs................................................................................................... 12
Table 5 – Lodestar Versions ................................................................................................................. 17

Lodestar Hardware
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Issue: A– Rev
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1 U.S. Department of Commerce License
This product contains US Department of Commerce controlled items. As such the Lodestar, or
Lodestar portion of the product, must not be removed from the housing, be disassembled or repaired,
outside of the terms and conditions detailed in the US Department of Commerce Re-Export Licence
under which the product was sold. If any servicing or repair of the Lodestar, or Lodestar portion of the
product is required consult your nearest Sonardyne office for the best current advice.
2 About This Manual
2.1 Purpose
This Lodestar Manual is part of a series of manuals produced by Sonardyne
Inte
rnational Limited to support their Lodestar unit. It describes the Lodestar
hardware and explains how to install, align and connect the system.
On-line
manuals
Sonardyne International Limited supplies manuals in an electronic form using the
PDF format. This format allows the reader to open the files using Adobe Acrobat or
another suitable PDF Reader application, and navigate the manuals easily and
quickly to find the information you need. For your convenience, Sonardyne
manuals include ‘links’, so that any references to figures, tables, sections and
pages are all active: you can click on them to ‘jump’ to the referenced location.
If required, the reader can print any part of this Hardware Manual. However, the
reader cannot select, copy, or change any part of it. Copyright in this manual
remains with Sonardyne International Limited at all times. Please refer to the on-
line help for your PDF Reader software to understand how to use all the features
available for searching and navigating the manuals.
2.2 How this manual is arranged
This manual is arranged in a series of chapters, each of which includes a number
of sections.
Chapter 1 ”About the Lodestar Manuals” beginning on page 6
An introduction to this manual. It includes information about what the manual
contains, who should read it, and how to use it.
Chapter 2 ”About Lodestar” beginning on page 8
An introduction to the Lodestar, giving a description of the equipment
Chapter 3 ”Technical Specifications” beginning on page 17
Technical specifications for the
Lodestar, giving dimensions, electrical
requirements and environmental limitations. Chapter 3 also lists the performance
specifications for the Lodestar.
Chapter 4 ”Installation” beginning on page 25
Instructions to identify and prepare the installation site and to install and connect
the
Lodestar to the controlling PC and other equipment. The alignment
requirements are important between the Lodestar and the vessel to deliver the
specified performance and these requirements are explained.
Chapter 5 ”Troubleshooting” beginning on page 31
Instructions to identify and resolve any issues with the operation of the Lodestar.

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Chapter 6 ” Maintenance” beginning on page 36
Guidance and explanations of how to undertake maintenance of the Lodestar such
as upgrading the firmware.
Who should
read this
manual
This Hardware Manual contains information for use by anyone involved with
installing, using or maintaining the Lodestar hardware. It includes technical and
user information to help deliver the best performance from the Lodestar.
Anyone who uses the Lodestar should make sure they read the relevant parts of
this manual. If the computer that holds this electronic manual is connected to a
printer, any part of it can be printed.
Operation
manuals
Operation manuals are supplied separately describing how to configure and use
the Lodestar for specific uses, e.g. Lodestar AHRS Operation Manual UM-8084-
107.
Updates to the
manual
If necessary, contact Sonardyne International Limited to check whether you have
the latest revision of this manual or to request printed copies.

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3 About Lodestar
3.1 Introduction
Sonardyne International Limited has applied its comprehensive experience in
producing advanced and dependable marine solutions to the development of the
Lodestar Attitude and Heading Reference System (AHRS) / Inertial Navigation
System (INS).
The Lodestar is a solid-state AHRS/INS that includes three Ring Laser Gyroscopes
(RLGs) and three linear accelerometers. These inertial-grade components provide
raw data to the Sonardyne-developed gyrocompass algorithm, which uses them to
produce a full range of accurate real-time motion and attitude measurements in all
sea states.
Developed originally to provide accurate heading and attitude measurements for
Sonardyne’s family of acoustic positioning systems, Lodestar is equally suited to a
variety of o
ther applications where the accuracy of heading and attitude
measurements is of critical importance. Lodestar can operate either as a stand-
alone AHRS or as part of an integrated system.
Lodestar is available in surface and subsea versions, where Sonardyne’s
experience with underwater acoustic navigation systems has been applied to
overcome the problems associated with conventional sensor platforms, such as
temperature shock.
Lodestar provides the following as standard:
•industry-standard output telegrams
•battery backup to maintain uninterrupted operation in the event of brief power
failure
•Battery operation will last up to two hours when using a battery from a fully-
charged condition.
•8 GB of internal memory.
•Upgrade capability to a full Inertial Navigation System
(INS) that provides
additional outputs of position, velocity, orientation and angular velocity at high
update rates.
•0.03° secant-latitude heading accuracy.
•0.01° roll and pitch measurement accuracy.
•Fast follow-up speed of 500° per second.
•Single-box solution for motion sensor and gyrocompass.
•No dedicated GPS receiver necessary.
•A settling time of less than five minutes.
•Support for all industry-standard telegrams.
•Ethernet interface as standard.
•Mean Time Before Failure (MTBF) for the IMU in excess of 100,000 hours.
•Low life-cycle cost.
•Flexible mounting arrangements.
•Low current draw on start-up.
•Choice of three subsea unit depth ratings – 1000, 3000 or 5000 metres.
•Heave measurement accuracy the greater of 5 cm or 5% of measured heave.
•Robust heave algorithm.
•Data output through RS232 or RS485 serial or Ethernet interfaces.

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The Lodestar has undergone independent and exhaustive testing against an
industry-recognised reference
and has proved capable of delivering accurate
measurements in highly dynamic marine environments. Lodestar benefits from
Sonardyne’s world-class manufacturing, support and training organization, which
has a well-established record for providing trusted solutions.
3.2 Front panel features of the Surface Lodestar
Sonardyne has designed the Lodestar AHRS to be as simple as possible to install,
connect, configure, and operate. To support this design principle, the front panel of
the Surface Lodestar has only a single operator control, a series of LED status
indicators, and eight
ports to connect Lodestar with external equipment and
supplies. The Surface Lodestar is shown in Figure 1.
Figure 1 – Surface Lodestar – Front Panel
Table 1 lists and describes the connection ports on the front panel of the Surface
Lodestar.
Table 1 – Connection ports on the Surface Lodestar front panel
Port Name
Description
Cable
P/N
See
Page
Auxiliary
Outputs
A 5-way female Lemo port that provides
selectable analogue outputs for each pin.
•Range ± 10 V
•Resolution 12 bit
•Minimum load 10 kΩ / 30 nF
8084-047
48

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Console Port
A 14-way female Lemo port that allows
connection of a PC to communicate with
the
Lodestar for configuration or data
logging purposes. DC power for the unit
may be connected here (24 / 8 V
nominal).
IMPORTANT: The console port
connection uses a channel select line
to specify RS232 (default) or RS485.
–
Connect Channel select to ground if
you are using RS232.
– Leave Channel select disconnected if
you are using RS485
8084-133
43, 44
RS485/
RS232_1
RS485/
RS232_2a
Two 12-way female Lemo ports that allow
serial data connection between the
Lodestar and external equipment. These
ports are both available to:
•transmit measurements from the
Lodestar to receiving equipment
•
receive aiding information from
external sources, for example a
GPS receiver
•send or receive a trigger signal
8084-134
45
Transceiver
Ports
A 10-way female Lemo port that allows
direct serial connection between Lodestar
and Sonardyne acoustic transceivers or
other external instruments.
These ports are also both available to:
•
transmit measurements from
Lodestar to receiving equipment
•
receive aiding information from
external sources, for example a
GPS receiver.
•send or receive a trigger signal
8084-135
46,47
Power In
A 3-way male inlet port that accepts
electrical power from an external mains
electrical source. This port accepts 110 /
230 V AC at 50 / 60 Hz.
Lodestar draws a maximum 20watts from
the external power. There is a 500mA(T)
fuse in line with
the external electrical
supply. The fuse is accessible without
disassembling the unit.
8084-054
49
Ethernet
A 100BaseT Ethernet port.
aWhen using Lodestar to supply NMEA outputs to multiple listening devices, use a two-wire shielded
twisted pair. See section 5.7 beginning on page 31 for information. The RS485 differential line consists
of two pins – ‘A’ and ‘B’ as defined in the NMEA standard:
‘A’ (TxD– / RxD-), or the inverting pin, is negative (compared to B) when the line is idle (data is 1)
‘B’ (TxD+ / RxD+), or the non-inverting pin, is positive (compared to A) when the line is idle (data is 1)

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ON/OFF power
switch
The ON/OFF power switch is a push button switch. Press and release to start the
Lodestar. Press and hold for at least 4 seconds to close down the Lodestar.
CAUTION
The ON/OFF power switch controls all power to operate the
Lodestar Attitude and Heading Reference System, including
power from the backup battery. If you operate the switch to
power-off the Lodestar, ALL Lodestar functions will stop after a
short delay.
When you operate the switch to power-on the
Lodestar, you
must wait for the settling time before the unit’s heading
measurements conform to the published accuracy specification.
See Lodestar AHRS Operation Manual UM-8084-107.
External supply
fuse
The single panel-mounted fuse holder carries a 20mm time-delay fuse rated at
500 mA(T). This fuse protects the external power connection. Fuse failure does
NOT disconnect the internal backup battery, which will maintain the Lodestar
operation for up to three hours from a fully-charged condition. An LED on the front
panel indicates when the Lodestar is operating on the internal battery.
Indicator LEDs
Five LEDs indicate the status of power and communications for the surface
Lodestar.
BATTERY AND CHARGE STATUS LEDS
There are two
LEDs to show the status of Battery Charge and of the External
Supply. Table 2 explains how these status LEDs operate¹.
Table 2 – Battery and charge status LEDs
External
power
Battery status
Lodestar
status
Battery
charge
External
supply
Supplied
Charging
Off
Flash green
Solid orange
Fully charged
Off
Solid green
Solid orange
Charging
On
Flash green
Solid green
Fully charged
On
Solid green
Solid green
Not supplied
Discharging
On
Solid red
Off
Low
On
Flash red
Off
Flat
On
Off
Off
1. In normal operation the External Supply LED and Battery Charge LED
should both be green. If the Battery Charge LED shows red, then the
external supply has been lost and the Lodestar is running on the internal
battery, which will provide up to 3 hours of operation from a fully-charged
condition. Switching off will also show red because the switch-off sequence
is controlled by the software.

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TRANSCEIVER PORT AND DATA/LINK LEDS
The remaining LEDs show the status of the transceiver ports and the data port, as
explained in Table 3.
Table 3 – Transceiver and data LEDs
LED
Colour
Description
Data/Link
Green
Illuminates when the Ethernet link is
active and is passing data.
Orange
Illuminates to show the Ethernet link
is available.
Safety grounding
stud
The surface version has a safety grounding stud fixed to the front panel. It is
necessary to connect this to a good grounding point on the vessel. This connection
is in addition to the ground connection made through the cable.
CAUTION
The Surface Lodestar must be permanently bonded to a
suitable grounding point on the vessel using the grounding stud.
16 AWG cable (or better) should be used for this.
3.3 Connectors of the Subsea Lodestar
The subsea version of the Lodestar AHRS does not include any operator controls
or indicators. The unit’s housing is cylindrical with two end-
caps to provide
watertight seals of the appropriate depth rating.
One end-cap is flat to support mounting against a flat surface. The other end-cap
includes ports for connection between L
odestar and external equipment and
supplies. The Subsea Lodestar is shown in Figure 2.
Figure 2 – Subsea Lodestar – End-cap Connections

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Port Name
Description
Cable
P/N
See
Page
Console Port
An 8-way male port allows connection of a
PC to communicate with the Lodestar for
configuration or data logging purposes.
This port also receives DC power from an
external source.
IMPORTANT: DO NOT
connect AC power to the Subsea
Lodestar. See section 4.3
beginning on
page 23
for details about Lodestar’s
electrical requirements.
8084-136
50, 51
C1 Port
An 8-way female port allows serial data
connection between the
Lodestar and
external equipment. This port can:
•transmit measurements from the
Lodestar to receiving equipment
•
receive aiding information from
external sources, for example a
GPS receiver.
•send or receive a trigger signal
8084-137
52, 53
E1 Port
(
Labelled C2
on old units)
An 8-way female port allows Ethernet data
connection between Lodestar and external
equipment. This port can:
•
transmit measurements from
Lodestar to receiving equipment
•
receive aiding information from
external sour
ces, for example a
GPS receiver
•send or receive a trigger signal
8084-138
54, 55
T1 Port
T2 Port
Two 6-way female ports allow direct serial
connections between the
Lodestar and
Sonardyne acoustic transceivers or other
external instruments.
These ports are also both available to:
•transmit measurements from the
Lodestar to receiving equipment
•
receive aiding information from
externa
l sources, for example a
GPS receiver or Doppler velocity
log.
•send or receive a trigger signal
8084-139
56,57
CAUTION
The unit’s depth rating requires all ports to have either the
correct connector or the correct dummy plugs securely fitted
when the unit is in water. The connectors are open-faced without
their dummy plugs fitted and are not waterproof in this state.
NEVER deploy the Subsea Lodestar in water unless all
connectors on the end-cap have their correct plugs or dummy
plugs fitted properly. Sonardyne supplies dummy plugs for this
purpose.

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Note: To improve the sealing performance of the connectors and dummy plugs, smear a
very light coating of grease, such as Molykote 44 Medium, approved for use in deep-water
seals, over the mating surfaces of the connector. Do not use oils or greases not suitable or
approved for this purpose.
Before you assemble any connectors on the Subsea Lodestar, make sure both
parts of the connector are in good condition and any O-rings are undamaged and
fitted correctly.
3.4 Operation
The Surface Lodestar begins to operate when you connect electrical power and
operate the ON/OFF switch to power-on the unit.
The Subsea Lodestar begins to operate when you connect electrical power to the
unit.
Start Up
Immediately following start-up, the Lodestar operates for a period of 20 seconds in
its firmware loader mode, during which it completes a built-in self-test routine.
While operating in this mode, the Lodestar sends information about itself and its
configuration through the Console port to a receiving PC, for example:
Firmware Loader Version 1.03.01.25 Feb 17 2010 09:23:33
CPU UART FPGA 3
CPU Interconnection FPGA 2
SDHC Card capacity:- 7948206080 bytes
.............................................
Loading firmware..............................
Note: The communication parameters used for the Console port are initially fixed at 9600
baud, 8 data bits, 1 stop bit and no parity.
On completion of this firmware loading routine, Lodestar switches to the saved
output configuration and begins to operate in accordance with the saved
configuration.
See section 7.1 starting on page 36 for instruction on how to upgrade the Lodestar
firmware.
Shutdown
In addition to the ON/OFF switch for the Surface Lodestar described in section 3.2
the Lodestar can be turned off via the terminal interface.
To turn off the Lodestar you must enter the command mode using the following key
entries:
•Hold down the CTRL and o keys together.
•Then type the following letters in sequence; SON
You will then be informed that you are in command mode with the following prompt:

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At this point, the Lodestar can be shutdown by typing in the shutdown command
SYS SHUTDOWN 1 three times, as shown in the example below.
The Lodestar will then shutdown.
Note that in firmware V2.03 onwards the Lodestar will shutdown with a single
command instead of 3.
Configuration
Software supplied by Sonardyne allows the user to configure and operate the
Lodestar (for AHRS operation, see manual UM-8084-
107 for guidance on
configuration). The Lodestar stores the configuration requirements in non-volatile
memory, and uses the stored details to restore the same operating condition when
you power-on the unit subsequently.
After you have made all connections between the Lodestar and external systems,
and you have configured Lodestar fully, the configuration PC can be disconnected
and allow the Lodestar to operate as a stand-alone motion reference unit. In this
mode, the
Lodestar will continue to operate in the same configuration until you
connect the PC and change the unit’s configuration.
3.5 Warranty
The Lodestar AHRS/INS is warranted against defects discovered in materials and
workmanship during a period of twelve (12) months from the date of shipment from
Sonardyne International Limited unless otherwise stated. This warranty is limited to
the replacement or, at Sonardyne’s option, repair free of cost, F.O.B. Sonardyne’s
loading bay in Yateley, UK, provided the equipment was not abused or operated
other than in accordance with the instructions in this User Manual.
All warranty repair claims must be returned to Sonardyne with a letter stating the
problem and probable cause together with a date and time of failure, with proper
documentation and with freight, handling and customs duties (if any) prepaid.
Return freight must also be prepaid unless otherwise arranged. Defective goods
returned to Sonardyne must be satisfactorily packed and they remain at the
Purchaser’s risk.
This warranty shall not extend to ex-demonstration units or any item of equipment
not manufactured by Sonardyne International Limited. If the supplied goods were
not manufactured by Sonardyne, then Sonardyne shall attempt to assist the
Purchaser to obtain from the manufacturer thereof the benefit of any warranty or
guarantee relating to them given by such manufacturer to Sonardyne.
Sonardyne International Limited makes no other warranty regarding its products or
the products of others either express or implied, including but not limited to, the
implied warranties of merchantability and fitness for a particular purpose with
respect to the supplied goods and the accompanying written materials.

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Limitations of
liability
The remedies provided herein are the Purchaser’s sole and exclusive remedies. In
no event shall Sonardyne be liable for any direct, indirect, incidental, punitive,
special or consequential damages, or damages for loss of profits, revenue, or use
incurred by the Purchaser or any third party, whether in an action in contract, or
tort, or otherwise even if advised of the possibility of such damages. The provisions
of these term
s and conditions allocate the risks between Sonardyne and the
Purchaser. Sonardyne’s pricing reflects this allocation of risk and but for this
allocation and limitation of liability, Sonardyne would not have agreed to supply the
products.
Copyright and
Disclaimer
Sonardyne International Limited asserts its ownership of the copyright in this User
Manual.
All product names referenced in this document are trademarks of their respective
companies. Use of a term in this document should not be regarded as affecting the
validity of any trademark or service name.
Sonardyne International Limited reserves the right to modify or make changes to
the Lodestar AHRS/INS, and the information contained within this document is
subject to change without notice. Any changes will be notified to the holder of this
document at the discretion of Sonardyne.
Product
Support
For a list of contact details for Sonardyne’s offices and agents, please refer to
section 8.2 “Sonardyne Offices and Agents” beginning on page 41.

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4 Technical Specifications
4.1 Introduction
Sonardyne International Limited exercises a policy of continual product
development and improvement. The technical specifications included in this
chapter are subject to change without notice. If necessary, contact Sonardyne
International Limited for details of the current specification.
Product
Versions
Table 5 lists the versions of the Lodestar currently available.
Table 5 – Lodestar Versions
Part Number
Description
8084-000-0000
IP67-rated surface version
8084-000-1110
1000 m depth rated version
8084-000-3110
3000 m depth rated version
8084-000-5310
5000 m depth rated version

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4.2 Physical
Surface
version
The physical specification of the Surface Lodestar are shown in Figure 3 and
Figure 4.
Figure 3 – Physical specifications – Surface Lodestar

Lodestar Hardware
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Figure 4 – Physical specifications – Surface Lodestar (continued)

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Issue: A– Rev
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Subsea
versions
The physical specifications of the Subsea Lodestars are shown in Figure 5, Figure
6 and Figure 7.
Figure 5 – Physical specifications – 1000 m Subsea Lodestar