Nautronix - Subsea UK€¦ · emergency Subsea Blow Out Preventer ) NASMUX™ (Nautronix Acoustic Subsea Multiplex) NASDrill (Nautronix Acoustic Subsea Drilling) NASDrill RS925 NASDrill

Nautronix

NAUTRONIX MARINE TECHNOLOGY SOLUTIONS www.nautronix.com

Nautronix | Presentation Overview

• Introduction

• Existing Technology

• New Technology

• NASDive Core Components

• NASDive Benefits

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Nautronix | Products and Services

NASNet®

(Nautronix Acoustic Subsea Positioning System) NASNet® DPR (Nautronix Acoustic Subsea Dynamic Positioning Reference) NASNet® FPR (Nautronix Acoustic Subsea FPSO Acoustic Monitoring System)

Survey Services A comprehensive range of survey services to the offshore construction industry − Equipment rental

− Processing

− Consultancy

− Offshore crewing

− New build

NASDive (Nautronix Advanced Digital Diver Communications System)

- Fully digital hardwired

diver communication System

- Digitally controlled through water acoustic communication system

NASCoM (Nautronix Acoustic Subsea Command, Control & Monitoring Systems) NASeBOP (Nautronix Acoustic emergency Subsea Blow Out Preventer) NASMUX™ (Nautronix Acoustic Subsea Multiplex)

NASDrill (Nautronix Acoustic Subsea Drilling)

NASDrill RS925 NASDrill USBL

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NASDive Technology

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Existing Diver Communications | Technology

• Fundamentals of four wire analogue signal based communications have not changed in the last thirty years

• Recent systems have improved user control and routing of conversations • However, low level analogue signals are still susceptible to electrical noise

and pickup • The problem is compounded by:

– Long cable runs – Deteriorating cores in umbilical – Slip rings – Junction boxes – Noisy electrical environment

• Problems with communications are the number one cause of lost time on dive vessels

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Diver Communications Technology | Advances

• Digitising signals at source (communications boxes and bell) avoids many of the issues associated with existing diver communications systems using analogue signals

• Such a system has been implemented and is called NASDive, comprising of wired chamber, bell communications and emergency TWC

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NASDive | Technology Advances

• Signalling

- All signalling is Ethernet over fibre optic, CAT 5 or STP (the latter using VDSL2)

- Bell umbilical requirement is reduced to 1 STP/FO (+ backup)

- Chamber wiring only requires one CAT5 cable and penetrator into each chamber

• Hardware - Topside uses telecommunications hardware - Standard telephone interface - Local control of microphone and headset levels

• Software control of complete system - Via touch screen display - Remote support via internet connection - Auto switchover to backup systems - Individual HSU for each location - Unscrambling at dive bell for excursion divers

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Through Water Systems:

• Software defined radio avoids need for tuning

- Signaling is still 25kHz analogue SSB and fully compatible with alternative 25kHz systems

• Manual/auto squelch on receiver to stop ‘hiss’ when not running

• Digital notch filters for noise reduction

• Extensive diagnostic access over Ethernet to commission/test

• Directional transducer to improve quality and range

Wired Systems:

NASDive Core Components

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NASDive | System Components

Display and Control Unit: • Interface in saturation and dive control areas • Flexible number of stations and buses per

screen • Touch screen supporting up to 100 users • Helium Speech Unscrambler (HSU) for each

diver • Wireless headset capability as standard • Multiple telephone interfaces • Multi-page capability • Master/slave capability

– NORSOK compliance

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LCU Interface and Bell Electronics Bottle: • Bell and lifeboat control

− Provides an independent communications system − Up to four users − Connects transparently to main control unit when available − Automatic switch over to local control when required

(umbilical failure, lifeboat launch, etc.) • Alphanumeric display

− Allows local configuration and control − Displays fault messages (power fail, loss of umbilical, etc.)

• Bell Electronics Bottle − System backup battery and processing electronics located

within external electronics bottle

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Communications Station:

• Replacing analogue interfaces with Ethernet digital audio for communication stations

• Station upgrades − Preamp for microphone

− Power amp for speaker

− Local side tone, helps eliminate audio feedback

− Ethernet interface for improved audio quality

− Local control of functions (volume, entertainment, etc.)

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DCU and Helium Speech Unscrambler (HSU) HSU operation at 180m:

• Helium speech algorithm improved • Minimal interference • Digitised speech improves performance

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NASDive Benefits

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NASDive | Safety Benefits

• Much improved speech quality

• Unscrambling of speech from all locations

• Auto switch over of communications cores in umbilical

• Continued communications (with unscrambling) between bell and excursion divers in the event of umbilical failure

• High quality unscrambled telephone link to all locations (medical emergencies)

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NASDive | Operational Benefits

• No communications quality deterioration with time

• High quality communications

• Simplified pre-dive checks

• Bell communications test box and external electronics bottle simplifies checks and maintenance

• Spare analogue connections simplify external communications (hyperbaric lifeboat, surface diver, etc.)

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Thank you

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Nautronix - Subsea UK€¦ · emergency Subsea Blow Out Preventer ) NASMUX™ (Nautronix Acoustic Subsea Multiplex) NASDrill (Nautronix Acoustic Subsea Drilling) NASDrill RS925 NASDrill

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