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TRANSCRIPT
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Capability PresentationCapability Presentation
Enhanced Diver Communications
Lindsay MacDonald
Senior Manager of Engineering
& Technology
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Overview
• Proserv Nautronix diver communication experience
• Brief overview of existing diver communication systems
in the Market
• Identify where improvements can be made
• Proserv Nautronix NASDive overview
• NASDive Diver Communication System schedule
• New features and enhancements
• Questions and discussion
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Diver Comms Market: Proserv Nautronix History
33XX wired series 33XX Through Water series
35XX wired series
NASDive wired
1985
1998
2014
35XX Through Water series
NASDive Through Water
Communications
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Diver Communications - Market
• Number of new developments in diver communications in past ten years, although
Proserv Nautronix have made minor developmental changes
• Emerging competing systems use the same infrastructure (and algorithms) and
design philosophy of systems designed 10 years ago, but with a new system
interface
• Same infrastructure and philosophy will result in similar capabilities (and limitations)
of previous generation systems
• Opportunity to utilise latest generation technology and more robust infrastructure to
produce a vastly superior communications system
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Diver Communications - What Can We Do Better?
Area to address Reason
Audio qualityLow signal levels, analogue to surface.
Very susceptible to Interference
Multiple cores required in
umbilicalStandard 3 diver bell needs 9 STP
Though Water
Communications, 25kHz SSB
Dated designs, most basic through water methods. Interference
from DP acoustics
Telephone interface Variety of different telephone network interface requirements
Helium Speech Unscrambler Single unscrambler, limited flexibility
Headsets Limited options
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Diver Communications - NASDive Benefits
Improvement Achieved by
Wired audio quality
Any Ethernet route e.g. fibre optic interface, Cat 5 Ethernet
or VDSL2 (For STP) for communications path
Ethernet digital audio to all points. Digitisation of speech at
bell, rather than at surface
Reduction in umbilical core
requirementOnly needs 1 STP, 1 fibre optic or 1 Cat 5 for bell
Though Water Communications
audio qualityDigitally processed radio and new transducer design
Helium Speech Unscrambler
(HSU)Moved to software domain. All divers have their own HSU
User interfaceInterface fully touch screen. Secondary smaller touch
screen, or portable touch screen (iPad etc) optional
Headsets optionsNew headset interface, resulting in unlimited options, wired
or wireless
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System Components: DCU
• Interface in Saturation and Dive Control
• Physical switches replaced with touchscreen
• Flexible number of stations and buses per screen
• Remote access from other touchscreen or portable device
• Multi-page option
– Unlimited channels on a single screen
– Flexible labelling for station/diver etc.
• Master - slave capability
– Ethernet
– NORSOK Compliance
• Wireless headsets
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System components: Tender user interface
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System Components: Tender Interface With Camera
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Local Control Unit Interface (LCUi)
• Bell and lifeboat control
– Provides mini communications control unit
– Up to 4 users with local unscrambling
– Connects transparently to main control unit when available
– Automatic fall-over to local control when required (umbilical failure, lifeboat launch)
• Alphanumeric display
– Allows local configuration and control
– Displays fault messages (power fail, loss of
umbilical etc.)
– Displays text messages from tender either
through umbilical or through water
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System Components: Communications Station
• Replacing analogue interfaces with Ethernet digital audio for communication stations
• Station upgrades
– Preamp for mic
– Power amp for speaker
– Some local control with diver, e.g. entertainment, volume
– Side tone for own voice, prevents feedback issues
• Ethernet to bell/chambers
– Using copper, fibre, or shared multiplexers
• Improved audio quality from digital interfaces
• Ethernet buses, so no analogue signal level
drop when sharing buses
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System Components: Telephone Interface
• Effectively unlimited exchange lines*
• Direct dial to stations from vessel systems*
• Telephone can be assigned to bus (conference calls)
• Telephone can be assigned to station (private calls)*
– Station will be Helium unscrambled if required
– Call is protected from being cut off accidentally by bus reconfiguration
• VOIP interface*
– Vessel VOIP systems
– External VOIP calls
* Unique to Proserv
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Emergency TWC System
• Software defined radio avoids need for tuning*
• Fully compatible with standard 25kHz Through Water
Communications
• Signalling is still 25kHz analogue SSB
• Manual/auto squelch on receiver to stop ‘hiss’
• Digital notch filters for noise reduction (e.g. HiPAP)
• Extensive diagnostic access over Ethernet to
commission/test
• Transducer replacement to improve quality and range
* Unique to Proserv
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Standards and Qualifications
• NORSOK Diving Standards
– U100 - Manned Underwater Operations
• IMCA Standards
– D045, R015 - Code of Practise for the Safe Use of Electricity Underwater
• DNV Standards
– DNV-OS-D202 - Automation, Safety and Telecommunication Systems
– DNV-OS-E402 - Offshore Standard for Diving Systems
• British Standards
– BS EN 14931: 2006 - Pressure Vessels for Human Occupancy
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Vessel Specific - Legacy Systems
• No umbilical changes
– VDSL2 communications, works over single STP, second STP used for redundancy
• Subsea electronics:
– Enabling the use of single STP for all bell communications
– Digitisation of the speech within the bell, increasing clarity of speech
– Internal or external Electronics Bottle
• Interface to any Through Water Communications
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Summary of Development and Build Schedule
April 2012Review of existing
systems and
market evaluation
May 2012Define system
specification
June 2012Prototype
components
designed
September 2012Engineering testing
and client review
December 2012Hyperbaric testing
of bell/chamber
electronics
March 2013Client demo of
production
system
April 2013First production
system
June 2013Systems ready for
delivery
June 2014First saturation
system delivered to
military client
November 2015Full dive control system
with saturation control
and ETWC delivered to
the client
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Vessel Specific - New Build Dual Dive Bells
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Vessel Specific - New Build SAT
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Summary of New Features/Enhancements
• Improved speech quality to bell and chambers, digital communications
• LCUi provides unscrambled speech in bell in lost bell scenario
• Reduced demand on umbilical infrastructure
• Per-channel helium unscrambling
• Improved entertainment quality/selection e.g.
– Stored digital audio, internet radio, local analogue sources
• Reduce ‘housekeeping’ while retaining control (full over ride from tender)
– Diver/Sat chamber local controls
• Volume / Entertainment select/control
• Local side-tone, separates each user’s mic and headphones/speaker
– Eliminates feedback ‘howl’ at a station i.e. hands free option
• Capability to interface, camera and video projection
– Provides ability to re-task diver
• Enhanced Emergency Through Water Communications (ETWC) by use of software
enabled radio
– Notch filters available to eliminate in-band noise
– Enhanced transducers to improve acoustic transmission/reception
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Thank you
Any questions?