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Coastal SystemsProduct GuideUnderwater Positioning,Navigation and

Relocation Systems

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Contents

Introduction 01Scout USBL Subsea Positioning System 02Scout USBL System Overview 03Scout USBL System Specifications 04Radian Attitude and Heading Reference System 05

AvTrak 2 AUV Navigation and Communications System 06Radian and AvTrak 2 Specifications 07Prospector Wide Area, Absolute Positioning 08Prospector System Overview 09Prospector System Specifications 10

Homer-Pro Diver Based Target Relocation 11ROV-Homer Low Cost ROV Guidance 12Homer-Pro and ROV-Homer Specifications 13Transponders Coastal, LRT, LAT and WSM 14Transponders Specifications 16

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Coastal Systems Product GuideUnderwater Positioning, Navigation and Control Systems

01

Trusted SolutionsPosition, Track, Relocate

IntroductionFor over 30 years Sonardynehave been pioneers in the use ofunderwater sound for navigation,

positioning and communications.In the worlds most challengingsubsea environments our solutionsdeliver accuracy and reliabilitygiving you the confidence to operatesuccessfully at any water depth.

Since the introduction of our firstdiver-based product in 1974, wehave been committed to developingreliable, easy to use and high

performance acoustic systems forRemotely Operated Vehicles (ROVs)and divers.

Applications for the Coastalproductrange are found withinthe oceanographic, search andsalvage, survey and marinearchaeology industries whererequirements vary from trackingtowfish and navigatingdiversthrough to conducting harbourinspections with ROVs andrelocating targets of special interest.

Sonardyne acoustic releasetransponders, for example, arean important component in theinventory of many scientificorganisations. The units are reliedupon for the recovery of valuabledata monitoring equipment thatin many cases have been deployed

for several years.

As all of the products within theCoastal product range share thesame frequency band, users canbenefit from mixing-and-matching

components to suit their particularapplications. For example, an LRTcan be used as a simple releasetransponder or as part of aProspector positioning systemdepending on what topsideequipment is being used.

Sonardynes manufacturing facilityis in the UK with regionalcompanies strategically locatedaround the world providing sales,product support and equipmentservicing. This is backed by aworld-wide, 24hr helpline thatprovides emergency telephoneassistance for all our products.

Subsea Positioning

Sonardynes Coastal products are widelyused to position ROVs, divers and AUVs.The systems provide high accuracyand can be installed on both small andlarge vehicles

Towfish Tracking

Accurate and reliable towfish tracking,just one of the applications for ScoutUSBL (Page 02)Diver NavigationSave time and cost with precisenavigation and guidance for divers

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02 Coastal Systems Product GuideUnderwater Positioning, Navigation and Control Systems

Scout USBLSubsea Positioning System

IntroductionScout USBL is a complete vesselbased subsea positioning systemfor divers, ROVs and towfish.

Scout calculates the position of asubsea target by measuring therange and bearing from a vesselmounted transceiver to a smallacoustic transponder fitted to thetarget; a technique known as Ultra-Short BaseLine (USBL) positioning.USBL positioning is widely used bythe offshore and oceanographicindustries as it offers high accuracyperformance combined with ease

of operation.

One of the main advantages of thetechnique is that no other in-wateracoustic equipment has to bedeployed before underwateroperations can commence. Onlythe targets being tracked need tobe equipped with a transponder.With Scout, a support boat canarrive on location and begin

tracking straight away. This hasparticular benefits for search andsalvage applications when searchtimes are critical.

Key Features

Easy to install and use

Affordable and high accuracy

All sensors, software andhardware provided

1,000 metre design slant range

Upgrade path to deep waterUSBL systems

Scout,ScoutPlusandScoutProThree versions of Scout areavailable: Scout, Scout Plus andScout Pro.

Scout and Scout Plus are entry levelsystems designed for general targettracking applications at ranges upto 500 metres. Scout can track onesurface vessel and four subseatargets whilst Scout Plus can tracksix targets and incorporatesaresponder mode for fast positionupdates of ROVs and towfish. Withboth systems, all sensors and

hardware are provided whilst thesoftware is simple to learn andintuitive to use. These features makeScout and Scout Plus the ideal

solution for users with little or noprior experience of acoustic systems.

Scout Pro is designed to support

complex contruction surveyapplications through its fullyfeatured software. It providesgreater accuracy, tracking forup to 10 subsea targets and a1,000 metre design slant range.

The advanced topside controlhardware supplied with Scout Prosystems enables experienced usersto operate using Sonardynes latestWideband signalling technology

and its associated benefits thatinclude greater immunity to noiseand a ten fold improvement inmeasurement repeatability.

This same topside unit can also beused with Sonardyne Ranger USBL,Fusion USBL and Fusion LongBaseLine (LBL) equipment thereforeproviding a cost effective andversatile upgrade solution for full

ocean depth subsea operations.

ROV and Towfish Installation

Coastal transponders are compactand rugged and can be installed directlyonto ROVs or small towfish attached tothe umbilical

Lightweight Release Transponder

The LRT is a versatile acoustic releasetransponder with a Safe Working Load(SWL) of 125kg

USBL Positioning

The Scout USBLsystemcalculates theposition of a target by measuringthe range and bearing of a transponderfromthe vessel

Elevation

Range

Azimuth

Transceiver

ROV with Transponder

DGPS

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03

Scout USBLSystem Overview

Scout Software Display

Scouts Simple UI software is easyand intuitive to use and requires minimaluser training

Scout Transceiver

Scout transceivers are small, easy todeploy and incorprate an internalheading, ptich and roll sensor

Surface Interface Unit

The SIU provides power andcommunications to the transceiverSurface Command UnitThe SCU is a self contained PC, displayand interface unit for operating Scoutand Scout Plus fromany type of vessel

Transceiver Deployment

For temporary vessel installations,a dedicated lightweight deploymentpole is available fromSonardyne

System OverviewA Scout USBL system is comprisedof four main components: controlsoftware, vessel based interface

unit, acoustic transceiver andtransponders.

SoftwareScout and Scout Plus software iseasy to use and intuitive to operate.It is designed to appeal to userswho wish to arrive on location andbegin tracking a target immediately.

Scout Pro software shares a commonlook and feel with Sonardynes

Fusion and Ranger systems andoffers users a complete range ofsurvey tools. These include: chartbackdrops, industry standardoutput telegrams and configurablesensor displays.

Interface UnitAs standard, Scout and Scout Plussystems are supplied with a rack-mountable Surface Interface Unit

(SIU) that supplies power andcommunications to the transceiverand is connected to the users owncomputer via a serial or USB link.

For complete portability, the optionalSurface Command Unit (SCU)enables Scout and Scout Plus tobe operated from almost any size

of boat. It comprises a PC, highbrightness TFT display, sensorinterface and rechargeable batteryincorporated in an splashproof case.

Scout Pro systems are suppliedwith a Navigation Controller Unit(NCU). In addition to accuratelytime stamping incoming data fromexternal devices such as GPS, Gyroand VRUs, the NCU also providespower and communications for

the vessels USBL transceiver.

TransceiverThe Scout transceiver providesa hemispherical pattern of acousticcoverage enabling tracking oftargets from far below through tonear surface. For this reason, it issuitable for a wide variety of taskssuch as towfish tracking.

The compact design of thetransceiver makes it easy to installon a simple over-the-side mount orthrough a gate valve. Sonardyne

can supply an easy-to-assemblepole, complete with fittings andadvice on installation, if required.Options include a water block

protection device and tiltedtransducer array.

To simplify set-up, an integratedmotion sensor automaticallycompensates for the dynamic motionof the vessel. For higher accuracyapplications, external referencesensors can be used with ScoutPlus and Scout Pro.

TranspondersScout USBL is compatible with theSonardynes family of low costHF frequency transponders. ScoutPlus and Scout Pro both offeradditional compability with theadvanced Wideband Sub-Mini(WSM) transponder.

Alltranspondershavebeendesignedfor applications where size andweight are important operational

factors, such as installation on theback of a diver or ROV. For moreinformation on transponders, turnto Pages 14 and 15.

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Scout USBLSystem Specifications


System Performance

General

Design slant Range 500 metres (Scout, Scout Plus) 1,000 metres (Scout Pro)

Acoustic Coverage 90below transceiver

Accuracy 2.75% of Slant Range (With internal Heading and Attitude sensor)0.5% of Slant Range (With external VRU and Gyro)

Tracking Supports tracking of one surface vessel and multiple subsea targets

Transceiver

Type Number 8024

Operating Frequency Sonardyne HF (35-55kHz)

Sensors Heading and Attitude

Options Tilted Array

Deployment Method Through-hull or Over-the-Side

Mechanical Construction Aluminium Bronze, Powder Coated

Dimensions Without Guard (LxDia) 489mm (19.25") x 160mm (6.3")

Weight in Air 18.9kg

Weight in Water 8.9kg

Surface Command Unit (SCU)

Type Number 8039

Processor Pentium M

Operating System Windows XP Professional

RAM 512Mb

Hard Disk 40Gb

Ports (Front Panel) 4 x Serial Ports, 1 x USB 2.0

External Inputs Transceiver, Responder Trigger, GPS Antenna (Optional)

Battery Internal Li-Ion (UN Transport Approved)

Typical Battery Life 1-2 hours

Power Supply 12-16V DC

Display Panel 12.1 TFT, 1024 x 768

IP Rating IP65

Dimensions (LxWxH) 444.5mm (17.5) x 305mm (12) x 178mm (7)

Weight 10kg

Surface Interface Unit (SIU)

Type Number 8038

Ports 4 x Serial Ports, 1 x USB 2.0

External Inputs Transceiver, Power, Responder Trigger

Power Supply 110 / 230V AC

Dimensions (LxWxH) 432mm (17) x 305mm (12) x 51mm (2)

Weight 3kg

Navigation Controller Unit (NCU)

See separate datasheet for full specifications

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05

Radian AHRSAttitude and Heading Reference System

IntroductionRadian is a miniature marine Attitudeand Heading Reference System(AHRS) using a triad of modern high

quality solid state MEMS inertialand earth magnetic field sensors.

Key Features

Surface or subsea versionsavailable

Low power consumption

High update rate of 100Hz

Industry standard serial outputs

Low latency

Suitable for highly dynamicconditions as gyro compensated

Magnetic field calibration systemprovided

Applications for Radian include:inshore hydrographic survey,compensation of bathymetrysystems and dead reckoning for

AUVs. The embedded processorallows the real-time output of highaccuracygyro compensatedmagnetic heading, pitch, roll andrelated information at high outputrates to provide the user with anoptimum orientation solution.

To correct any local disturbancesto the magnetic field caused bya vessels engines for example,a full magnetic field calibration can

be carried out with the easy to usesoftwaresupplied. A correctiontable is then stored within the device.

The relative weighting between themagnetic heading sensor data andgyro data can be adjusted toenable absolute or relative heading

output, dependent on the magneticenvironment that it is installed in.The filter response can be adjustedto suit different vehicle dynamics.

Radian supports RS232 or RS485communications with a rangeor proprietary or marine industrystandard serial outputs. With thesoftware supplied users can viewthe heading, pitch and roll data inreal-time on a PC or configure

serial outputs to other systems.

Radian is compatible withSonardynes family of Scout USBLtracking systems.

Radian subsea housing

Supplied within a 300 or 3,000 metrerated underwater pressure housing andaccepting a wide range of input

voltages, Radian can be mounted

anywhere on vessels, ROVs, AUVs andother vehicles or structures

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IntroductionAvTrak 2 is a second generationacoustic navigation andcommunications instrument designed

to form part of an integrated AUVnavigation system. It combines thefunctions of transponder, transceiverand telemetry link in one low powerdevice that has been designed tomeet the requirements of a variety ofmission scenarios and vehicle types.

Key Features

Incorporates Sonardynes latestWideband technology

Compatible with Fusion USBLfor surface vessel combinedtelemetry and positioning

Supports AUV-to-AUV rangingand telemetry

Two telemetry modes: Robustand High Data Rate Link

Designed for Doppler immunity

Emergency relocation mode

The unit can operate in Widebandor conventional tone mode andwitha variety of systems andtransponders.It isalso fully compatible

with Sonardynes family of FusionLong BaseLine (LBL) and Ultra-ShortBaseLine (USBL) navigation systems.

AvTrak 2 has a comprehensive,yet easy to use command languagethat allows the AUV to undertakesimultaneous LBL ranging, USBLtracking via a surface vessel androbust and high speed telemetryboth for AUV-to-vessel and AUV-to-AUV communications.

This capability provides the AUVdesignerwith good quality absoluteposition reference data to constrainthe drift in the vehicles inertialnavigation system.

AvTrak 2 is available in a varietyof configurations including: 3,000,5,000 and 7,000 metre depthratings, screened chassis option

for mounting within the main AUVpressure vessel, omni or directionaltransducers for shallow or deepoperations and a remote transducerfor easy installation.

An internal watchdog optionmonitors AUV communicationsactivity and can switch the unit intotransponder mode for emergencyrelocation. This is supported by aninternal back-up battery and digital

I/ O for emergency ballast jettison.

Sonardyne has extensivelymodelled the performance ofAvTrak 2 to achieve an optimumdesign. This capability is availableto customers in addition to adviceon transducer installation and itsimpact on system performance.

Position, Track, Communicate

Sonardyne has extensively modelledthe performance of AvTrak 2 to achievean optimumdesign. This capability is

available to customers to assist in

arriving at the best possible configurationfor their AUV

AvTrak 2AUV Navigation and Communication System

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Radian AHRS and AvTrak 2Specifications

Coastal Systems Product GuideUnderwater Positioning, N avigation and Control Systems

07

Radian AHRS

Type Numbers 8041-000-01 8041-000-02

Depth Rating 300 metres 3,000 metres

Dimensions (LxWxH) 160mm x 92mm x 78mm 160mm x 92mm x 78mm

Weight in Air / Water 0.64kg / 0.05kg 1.21kg / 0.61kg

Performance

Dynamic Range All angles 3D

Angular Resolution 0.05

Pitch Accuracy

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ProspectorWide Area, Absolute Positioning

IntroductionProspector uses a GPS calibratednetwork of low cost transpondersto provide high accuracy absolute

positioning over a wide area.

Prospector can track one surfaceand one underwater mobile object,such as an ROV, diver, towfish orAutonomous Underwater Vehicle(AUV). This is combined withthe minimum of vessel mountedhardware and easy to use software.

Key Features

Low cost system Quick to deploy

Easy to calibrate

Highly accurate

Some of the many tasks thatProspector can be used for include:underwater inspection, debrissearches, mapping, inshore

construction work, ordnanceclearance, marine salvageassessment, marine biologysurveysand marine archaeology.

This simplified acoustic systemis extremely easy to use andyet brings the inshore diver andROV operator the same advancedSonardyne technology used tosave time and money in mostof the worlds offshore oilfield

developments.

Four acoustic transponders aredeployed on the seabed withsurface or sub-surface floats to forman underwater navigation networkwith each transponder beingdeployed at one corner of asquare. The positions of these fourtransponders are then calibratedby sailing the vessel briefly around

the square, typically in under20 minutes.

Once calibrated, the transponderarray may be used to position adiver or ROV. Since both the boatsposition and the divers or ROVs

position are known, referenced toDGPS data, Prospector can trackboth objects simultaneously to ahigh degree of accuracy, in waterdepths from less than five metresto 500 metres.

During tracking operations thepositions of both the boat andthe diver or ROV are shown ona chart display. The chart alsoshows the position of the four

transponders, any waypoints,position fixes or survey linesand can also show a backgroundchart. All of the tracking informationsuch as measurements andpositions are recorded for replay.

Wide Area Positioning

Prospector uses a GPS calibratedtransponder array to provide highaccuracy absolute positioning overa wide area

Prospector Transponders

A Prospector systemuses four Coastalor LRT transponders to provide widearea seabed positioningROV InstallationAn ROV equipped with a Prospectortransceiver and remote transducer

Diver Navigation

A diver takes a position fix using hisProspector remote transducer

DGPS

GPS Calibrated Transponder Array

Transceiver

Range

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09

ProspectorSystem Overview

Remote Transducer

The remote transducer transmits andreceives acoustic signals. It is typicallyheld by a diver or floats free above him

Prospector Transceiver

This is fitted to the divers backpack orROV. Cables connect it to the surfaceand remote transducer

System OverviewThe components of a Prospectorsystem are an acoustic transceiver,Surface Interface Unit (SIU), four

transponders and Windows-basedsoftware. All the equipment issupplied in a rugged case for easeof transport and storage. A computerand Global Positioning System(GPS) receiver are also required.

TransceiverThe transceiver is the electronicsmodule that is fitted to the diveror ROV. A connector on one endof the unit provides power and

communication to the SIU while theother connector is used to attach theacoustic transducer. The transduceris the part that actually transmitsand receives the acoustic signals.

The transceivers transducer sendsan acoustic interrogation signal toa transponder through the waterand receives an acoustic replysignal back from the transponder.By measuring the time between

sendingthe interrogation andreceiving the reply the transpondersdistance can be determined.

Surface Interface UnitThe SIU provides power anda communications link betweenthe transceiver and the computer

running the Prospector software.The SIU connects to the transceiverthrough a long cable fitted witha waterproof connector and thento a computer using a USB link.Four additional serial ports areincluded that can be used toconnect to external instruments.

TranspondersProspector is compatible witheither Coastal or LRT transponders

(see Pages 14 and 15). These canbe deployed in a maximum waterdepth of 500 metres and eithermounted in fixed seabed standsor supplied with release hooksfor easy recovery on the surface.

Computer and SoftwareThe computer running theProspector software connectsto the SIU using a serial

communications cable. Thesoftware on the computer talks tothe transceiver via the SIU sending

it commands to make it measureacoustic ranges to transponders.

The software also takes the rangemeasurements made by the

transceiver and calculates theposition of the transceiver fromthem. The boat, the transpondersand a chart of the working areacan be displayed on the computersmonitor.

Global Positioning System(GPS) ReceiverPositions from a Global PositioningSystem (GPS) receiver are usedwhen determining or calibrating

the positions of the transpondersjust after they have been deployed.The GPS receiver fitted to the boatprovides position measurements inreal-world co-ordinates. The GPSreceiver connects to the SIU via aserial port.

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Transponder Deployment

Typical seabed deployment methods forCoastal and LRT transponders

Transponder Frame

Preparing to deploy an LRT in a seabedtransponder frame

Prospector Installation

A diver prepares to enter the waterequipped with a Prospector transceiver

ProspectorSystem Specifications


System Performance

General

Transponder Array Size 500 metres x 500 metres (Maximum)

Accuracy 300mm absolute, 100mm relative

(The accuracy of positions obtained by the system is dependant on the accuracyof the initial array calibration, itself dependant on the quality of the surfacepositioning instruments)

Tracking Supports tracking of one surface vessel and one umbilical connected subsea target

Transceiver

Type Number 7832-000-05

Depth Rating 500 metres


Transducer Type Remote Omni-Directional (Cable connected to transceiver)

Transmit Source Level 190dB re 1Pa at 1 metre

Power 12-24V DC (From SIU or SCU)Communications RS485

Mechanical Construction Anodised Aluminium Alloy and Plastics

Dimensions (LxDia) 272mm (10.7) x 72mm 2.85)

Weight in Air Transceiver 2.1kg, Remote transducer 0.5kg

Weight in Water Transceiver 1.3kg, Remote transducer floats

Surface Command Unit (SCU)

Refer to Page 04 for specification

Surface Interface Unit (SIU)

Refer to Page 04 for specification

Coastal

transponderwith float

LRT withfloat and

sinker

weight

Recovery line

Surface float

Double sinker weights

Transducer

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11

HomerProDiver Based Target Relocation

IntroductionHomer-Pro enables divers to quicklyand easily relocate targets in lowand zero visibility from over 750

metres distance. By using smallacoustic transponders to mark pointsof special interest, for example, tools,wrecks and pipelines, a diver canswim directly to a location, therebyreducing wasted dive time.

Key Features

Small and lightweight

Easy to use

Fast, simple target relocation ofpoints of interest: pipes, tools

Saves time and money on divingoperations

Compatible with Associationof Offshore Diving Contractors(AODC) transponders

Homer-Pro comprises of a diverheld relocation device and lowcost transponders which aredeployed at the target locations.

Each transponder has its ownunique address code, enablinga number of targets in a smallarea to be marked and relocatedunambiguously.

When the diver wishes to relocatean object fitted with a transponder,he switches on his handheld unitand selects the address of thetransponder he wishes to relocate.

The divers unit then sends out

an interrogation signal to thetransponder selected. If thetransponder is within acousticrange of the divers unit it willautomatically reply. From the replythe divers unit calculates thedistance in metres and directionto the transponder. The range anddirection information is displayedto the diver enabling him to beguided directly towards the object.

A diver changes the address of thetransponder he wishes to hometo by using a single push buttonswitch. To save time in switching

between targets, the divers unit canbe pre-programmed with only theaddresses of the transponders thatare likely to be encountered duringthe dive. The diver's unit containsa Ni-Cad battery which must becharged before diving.

Designed for commercial andamateur divers, Homer-Pro can alsobe used as a cost effective surveytool for accurately measuring

distances of up to 750 metres.

Homer-Pro Display

The Homer-Pro display provides rangeand direction information so that a divercan swimdirectly towards the target

Target Selection

Selecting the address of a transponderto home into

Target Relocation

A diver pointing a Homer-Pro towardsthe target he wants to relocateDiver with TransponderHomer-Pro can be used to relocate anytarget equipped with a transponder,even other divers

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ROVHomerLow Cost ROV Guidance

IntroductionROV-Homer is a miniature rangeand direction guidance systemfor small or large ROVs. Based

on proven acoustic principles,it is specifically designed for fast,efficient relocation of underwatertargets such as: aircraft blackboxes, lost diving bells, divers andseabed equipment.

It enables points of interest tobe marked with an acoustictransponder so that an ROV pilotcan be guided straight back tothe target even in zero visibility.

The system helps reduce searchtime and therefore operating costs.

Key Features

Low cost ROV guidance system

Saves time and operating costs

Allows operation in zero visibility

Depth ratings to12,000 metres

Critical point marking: tools,

valve heads, pipelines

Emergency relocation: divingbells, flight recorders, ROVs...

The system consists of an ROVmounted range and directionunit, PC control software andtransponders which are attached

to the targets that need to berelocated.

Once the pilot has selected thetarget he wishes to home into,the ROV unit begins interrogatingthe designated transponder todetermineits range and direction.

This information is communicatedback to the surface, via the ROVsumbilical, and is displayed on theuser's PC. The software indicates

the range to the target and in whichdirection to turn in order to fly theROV directly towards the selectedtransponder.

The ROV mounted unit is accuratelyaligned with the ROVs headingsensor and is connected to sparecores on the ROVs umbilical orthrough the ROVs communicationsmultiplexer.

The electronics inside the unitincorporate power regulation,an RS232 interface and a micro-processor, all of which are

galvanically isolated from the ROVselectrical system. A 12 to 24V DCpower supply is connected via thesame connector. On smaller ROVswhich do not have communicationsmultiplexers, and therefore cannotsupport RS232, an RS485 interfacecan be provided.

The standard depth rating of theROV unit is 4,000 metres. Thisallows the system to be used with

either the 500 metre range oftransponders or the deeper rated

Type 7835 transponder which isalso depth rated to 4,000 metres.For ultra deep water applicationsa 12,000 metre titanium versionof the system is available.

ROV Range and Direction Unit

The ROV-Homer range and direction unitallows ROV pilots to fly directly towardstargets equipped with a transponder

ROV Installation

ROV-Homer installed on an ROV duringthe recovery of a Black Box flight recorderDeep Marker TransponderFor ultra deep applications, a 12,000metre rated titaniummarker transponderis available

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Homer Pro

Type Number 7797


Operating Frequency HF (35-55 kHz)

Interrogation Interval 1 second

Range Resolution 0.1 metre

Display Type 4 digit, 7 segment LED with brightness control

Update Interval 1 second

Power Ni-Cad rechargeable

Battery Life Approx 4 hours

Directional Indication +/ -5 Indicates Left or Right when outside sector

Mechanical Construction Anodised Aluminium Alloy and PlasticsDimensions (LxDia) 226mm (8.9) X 70mm (2.75)

Weight in Air 1.5kg

Weight in Water 0.6kg

ROV-Homer

Type Number 7832-000-01 7832-000-03

Depth Rating 4,000 metres 12,000 metres

Operating Frequency HF (3555kHz) HF (3555kHz)

Transmit Source Level 90dB re 1Pa @1metre 90dB re 1Pa @1metre

Directional Indication (10Wide Receive) Left, Right or Ahead Left, Right or Ahead

Range Resolution 0.1 metre 0.1 metre

Maximum Operating Range 750 metres (Dependent on conditions) 750 metres (Dependent on conditions)

Power Supply 12V 24V DC 12V 24V DC

Quiescent Life Continuous when powered from ROV Continuous when powered from ROV

Position Update Interval 1.5 seconds 1.5 seconds

Mechanical Construction Anodised Aluminium Alloys and Plastics Titanium grade 5

Diameter (LxDia) 272mm (10.7) x 72mm (2.85) 370mm (14.57) x 100mm (3.94)

Weight in Air 2.1kg 8.0kg

Weight in Water 1.3kg 5.8kg


13

HomerPro and ROVHomerSpecifications

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TranspondersCoastal, LRT, LAT and WSM

Coastal TransponderThe Coastal transponder has beendesigned for very low costapplications where size and weight

are important operational factors.Its the ideal choice for attachingto towfish, underwater structures,diving bells and instrumentationpackages so that they can be trackedor relocated using any of theCoastal tracking and relocationproduct range.

Key Features

Versatile, low cost transponder

Depth rated to 500 metres

Compact and rugged design

Alkaline battery packs giveup to 18 months listening life

Compatible with AODCemergency channels

Lightweight ReleaseTransponder (LRT)

The LRT is similar to a Coastaltransponder but incorporates

an acoustic release mechanismfor added flexibility. This allowsthe transponder to be deployedon the seabed with a sinker weightto hold it down and a buoy to keepit upright.

By sending a command from thesurface, the transponder releasesthe sinker weight and floats to thesurface for recovery.

Key Features

125kg Safe Working Load


Up to 4 years listening life withlithium battery pack

Thousands of secure identities

Reliable, screw-off release

Optional 75 metre rope canister

The unique design of the screw-offmechanism ensures a positiverelease action that overcomes anybiological growth.

Unlike similar low cost releasetransponders, the LRT has bothreceive and transmit functions,enabling accurate slant ranges tobe measured, release actuation tobe confirmed and position to bedetermined.

LRT Rope CanisterAn optional attachment for the LRTis a rope canister that allows items

left on the seabed, for example,tools, cables and salvage, to bequickly and easily hauled up.

It works by mooring one end ofthe rope to the item on the seabedand the other end to the LRT via theattached canister of rope. As thetransponder ascends to the surface,high strength rope is deployed fromthe canister. This line can then be

used to pull up the item directlyor retrieve heavier tag lines.

Coastal Transponder

The Coastal transponder is a low costand versatile transponder suitable fora wide range of shallow water subseaapplications

Lightweight Release

Transponder (LRT)The LRT is a combined positioningand acoustic release transponder depthrated to 500 metres

LRT with optional Rope Canister

The LRT Rope Canister is packed with75 metres of high strength rope to allowseabed items to be pulled up

Screw-off Release

The LRT features a highly reliablescrew-off release mechanismDeck UnitTesting an LRT on the back deck priorto deployment

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15

Lightweight ActuationTransponder (LAT)

The Lightweight ActuationTransponder (LAT) provides a simple

yet reliable way of controllingsubsea electrical equipmentwirelessly. Applications for theLAT include activating the inflationof buoyancy bags and opening orclosing valves. The output from anLAT can be configured to providemulti-width and multi-pulse electricaloutputs to suit a wide range ofrequirements. The LAT can alsobe interrogated from the surfaceto determine its position on the

seabed and provide confirmationof electrical activation.

Key Features

Commands and controlssubsea devices

Configurable signal output

Robust underwater connector


Long battery life

Transponder Deck UnitCoastal, LRT and LAT transpondersare commanded using a small deckunit and dunking transducer. The

unit is used initially to program theacoustic identity of the transponder,test it and load the release prior todeployment. Once deployed, it canbe used to measure ranges to thetransponder to relocate it and in thecase of an LRT, send releasecommands. The deck unit can alsobe controlled via RS232 enablingraw range data to be logged to PC.

Deep Marker TransponderThe Deep Marker Transponder isa deep rated version of the Coastaltransponder. The unit has beenprimarily designed for use withSonardynes ROV-Homer guidancesystem (see Page 12) and enablesunderwater targets such asstructures and seabed equipmentto be marked and later relocated.

Deep Marker Transponders are

available in 4,000 metre and12,000 metre depth ratings.

Wideband Sub MiniThe Wideband Sub-Mini (WSM)is a new compact, ruggedtransponder/ responder designed

primarily to position ROVs, towfishand other small mobile targets.Available as a 1,000 metre ratedomni-directional unit or 3,000metre rated directional unit, WSMshave the option of a depth sensorfor improved positioning accuracy.

In addition, WSMs support intelligentcharging of its long-life NiMHbattery, Windows-based set-upsoftware, Sonardyne Widebandsignals, tone frequenciesand allHPR300/ 400andHiPAPchannels.

Key Features

Depth rated up to 3,000 metres

Transponder or Responderoperating modes

Channel selection via serial dataport to PC

On / Off switch

Remote Actuation

Activating the inflation of a buoyancybag is just one use for a LightweightActuation Transponder

Lightweight Actuation

Transponder (LAT)LATs provide wireless control of subseadevices. Its signal output can beconfigured to suit customer electronics

Wideband Sub-Mini (WSM)

The WSM is Sonardynes new sub-minitransponder and incorporates the latestWideband acoustic signallingtechnology

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TranspondersSpecifications


Coastal Transponder

Type Number 7815



Transmit Source Level 184-187dB

Receive Sensitivity 105-115dB re 1Pa @ 1 metre

Number of Unique Addresses 3609 (Field programmable)

Switch On Continuously operating (No On/ Off switch)

Battery Life Alkaline:18 months

Mechanical Construction Plastic and Anodised Aluminium Alloy

Dimensions (LxDia) 442mm (17.4) x 63mm (2.48)

Weight in Air / Water 1.1kg / 0.75kg

Deck Unit Type 7967-000-02 (Includes transducer and 10 metres of cable)

Deep Marker Transponder

Type Number 7835 Type 7835

Depth Rating 4,000 metres 12,000 metres

Operating Frequency HF (35-55kHz) HF (35-55kHz)

Transmit Source Level >183dB re 1Pa @ 1 metre >183dB re 1Pa @ 1 metre

Receive Sensitivity

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Lightweight Release Transponder (LRT)

Type Number 7986



Transmit Source Level 185dB re 1Pa @ 1 metre

Receive Sensitivity

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Head Office

Sonardyne International LimitedBlackbushe Business Park

Yateley, Hampshire, GU46 6GDi d i d

T. +44 (0) 1252 872288F. +44 (0) 1252 876100E. [email protected]

d opyrightSonardyne

InternationalLimited.

Specificationssubjecttochangewithoutnotice.

Printed08/07

Agent ID:

82d263f7-b06a-4140-954b-94694cf6fd3f

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