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WhatisthePerfectROV?

Minimaltetherdiameter(forinstance,asinglestrandof

unshieldedop=calfiber)

Poweredfromthesurfacehavingunlimitedendurance

(asopposedtoba+eryoperatedwithlimitedpoweravailable)

Verysmallinsize(toworkaroundandwithinstructures)

Haveanextremelyhighdatapipelineforsensorthroughput.

Trade-offofanumberoffactorsCost,size,Deploymentresources/plaNorm,

Opera=onalrequirement.

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MECHAICALADELECTRO/MECHAICALSYSTEMSWeightisoneofthemostcri=caldesignfactors,thecomponents/

subsystemshavingasignificantimpactinthisarea

ComponentsofROV

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Tether??(HardwirelinkUWV&OpPlaNorm)

Communica=on-

Radiofrequency(RF)wavesWatershashigha\enua=onofRFsenergyTravelveryshortdistance

RFisofalowfrequency,havehigherwavelength-Penetrate

deepinwater(lowersthedatatransmissionrate)

Remoteinspec=ontaskslivevideoatthesurface

Decisionononnaviga=ngthevehicle&inspec=ngthetarget.

eedahigh-bandwidthdatalink.

Acous=cin-waterdatatransmissionislimitedtolessthan100KBPS

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ROVClassifica=onsObserva=onclassormallyaflyingeye

designedspecificallyforlighterusagewithpropulsionsystemstodeliveracameraandsensorpackagetoaplacewhereitcan

provideameaningfulpictureorgatherdata.

(ModernObserva=onclassHugeCapabili=es)

WorkclassGenerallyhavelargeframes(measuredin

mul=pleyards/meters)withmul=-func=onmanipulators,hydraulicpropulsion/actua=on,andheavytoolingmeantfor

largerunderwaterconstruc=onprojects

SpecialuseTetheredunderwatervehicles,designedfor

specificpurposes.CableburialROVsystemdesignedtoplowtheseafloortobury

telecommunica>onscables.

(WewillstudyObserva=onClassOnly)

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SizeConsidera=onsVehiclesizeversustasksuitability

Thelargersystems-higherpayloadandthrustercapability,

allowingbe\eropen-wateropera=ons.

Thesmallersystems-muchmoreagileingenginto=ghtplaces

inandaroundunderwaterstructures,makingthemmoresuitable

forenclosedstructurepenetra=ons.

Thechallengeistofindtherightsystemforthejob.

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SizeSpectrumObserva=onClassROV

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ROVCrew

Largerwork-classsystem-Asupervisorwithtwoormoreteammembers(specializedknowledgeinareassuchasMechanical&Electricalsystems.

Smallersystems-Asupervisoronly.

Observa=onClass-Anoperatorandatethertender

(Forperforminganinspec>ontask,itisquitehelpfulto

alsohaveathirdpersontotakeprolificnotesaswellasa

secondsetofeyestoviewthejobforcontentand

completeness)

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PlaNormorVesselofOpportunity

LargerROVSystems-Rangefromadrillingrigdecktothemoonpoolofaspecialized,dynamicallyposi=onedDiverSupportVessel(DSV)ouNi\ed

specificallyforROVopera=ons.

Observa=on-ClassSystems-AnynumberofworkplaNormsmaybeuseddependingupontheworkenvironmentandtheequipmentbeingdeployed.

Characteris=csofWorkPlaNorm

Wateringresspointfootprintlargeenoughtodeploythesubmersiblesafely.

ComfortableplaNormfromwhichtooperatethevideoandelectronicsconsole.

Adirectlineofcommunica=onfromtheROVpilottotheoperatorofthemobiledeploymentPlaNorm.

Asufficientpowersupplytorunallequipmentforthedura=onoftheopera=on

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BuoyancyandStability

ROVsarenotnormallyequippedtopitchandroll.

HasareasonablyhighBGtogivethecameraplaNormmaximumstability

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SmallROVsystemshavefixedballastwithvariableposi=oningto

allowtrimmingofthesystemnose-up/nose-downorforroll

adjustment/trim.

Observa=onclass,thelead(orheavymetal)ballastnormallylocatedontracksa\achedtothebo\omframeformovementof

ballastalongthevehicletoachievethedesiredtrim.

Posi=veBuoyance