84
As result of developing these systems,
e‐navigation will be performed its’ mission which
take places within it’s’ definition by using data
originated form information pool of systems. In the
other words, satellite systems will be influenced the
futureofe‐navigation.
3.2.2 AidstoNavigation
From time immemorial, lighthouse,
buoy and
racons have been used for navigation but with
technologicaldevelopments,newelementshavebeen
integrated to these equipments for obtaining more
benefit and increased availability, reliability,
continuity,redundancy,integrityanddecreasedmean
time between failure and mean time to repair etc.
(IALA,2010).
IMO Resolution A.857 (20) Guidelines
define a
VesselTrafficServices(VTS)asa“Serviceimplemented
byaComponentAuthority,designedtoimprovethesafety
and efficiency of vessel traffic and to protect the
environment. The service should have the capability to
interactwiththetrafficandtorespondtotrafficsituations
developing in the VTS
area”(IMO Resolution A.857,
1997). As is understood from the above definition,
VTSaddresstoheavytrafficarea.Especially wecan
seeimportanceofitinstraitsandnarrowwaterways.
AccordingtoIALAGuideline1068(2009)istheaimof
VTSas“improvingthesafetyandefficiencyofnavigation,
safety of
life at sea and protection of the marine
environmentand/or theadjacentshorearea,worksitesand
offshore installations from possible adverse effects of
maritime traffic”. Also we can understand in here
positionofVTSine‐navigationconcept.Intheother
words, VTS is navigational assistance service and it
provides
information, warning, advice and
instructionintherelevantwater.VTS providesthese
by using Automatic Identification System (AIS) of
vessels. While AIS is still limited by the frequent
absenceofRadar/ECDISoverlayandthelimitationof
the Minimum Keyboard Display (GLA, 2007), vice‐
versa forthe other areas,this systemhas
developed
rapidly and nowadays it is integrated to buoys as
AIS‐AidstoNavigation(AtoN)system.AtoNsystems
enable to remote control, monitoring and
maintenance and testing of aids to navigation etc.
These advances are very important for future of
e‐navigationbecauseofeliminatinghumanfactors.
3.2.3 TerrestrialSystems:
e‐Loran
Basic principle of e‐navigation is to obtain
maximumperformancefromallcomponents.Forthis
aim,someelementstobeimprovedortakeoverthe
otherlikethatLongRangeNavigation(Loran)works
onlandbasedincontrasttoGPS(basedonsatellite)in
time.e‐Loran,whichis
newgenerationLoransystem,
supply coastal position‐navigation‐timing (PNT)
necessitywiththeaccuracy,availability,integrityand
continuity performance as a substantive from GPS,
GLONASS,GalileoortheotherGNSSsystems (ILA,
2007). Because of being independent towards the
otherfactor,e‐Lorancanbeusedwithhighaccuracy‐
especially
suchasinharbourentrance,manoeuvring,
etc.‐ in maritime sector. Therefore, e‐Loran can
increase productivity of e‐navigation concept
especiallyincriticalpositionbyminimizing probable
accidents&raisingnavigationalsafety.
3.3 Communications
GlobalMaritimeDistressandSafetySystem(GMDSS)
istheinternationalradiosafetysystem.International
Maritime Organization
(IMO) mandates GMDSS for
ships at sea. It was implemented on February 1 in
1999throughamendmentstotheSafetyofLifeAtSea
(SOLAS)Conventionaswell.GMDSSmainlyaimsto
automate and improve emergency communications
fortheworldʹsshippingfleet(TheMercommsGroup,
2012).Mainlytwoservicesare
availablethatsupport
GMDSS. First, International Mobile Satellite
Organization (INMARSAT) is a British satellite
telecommunications company which operates a
system of geostationary satellites for world‐wide
mobile communications and which supports
emergencycommunicationssystemsaswell.Second,
Cospas‐Sarsat is a system only detects and locates
distressbeaconstransmittingon
thefrequencies121.5
MHz and 406 MHz (International Aeronautical and
MaritimeSearchandRescueManual,2010).Inmarsat
hasalotofsubtitlesuchasInmarsatA,B,C,Inmarsat
Fleet service and FleetBroadband etc. The most
important specifications of them are data transfer,
internet, videoconferencing, remote monitoring,
tracking, SafetyNET, FleetNET in
addition to basic
fax, telex, e‐mail services (Korcz, 2008). Especially,
internet networking can provide to us remote
controllingmecha nismviasatellite.Fundamentalaim
of e‐navigation which is controlling without human
factor can be achieved by improvement of
communication technologies.No doubt that GMDSS
will be updated in parallel
to e‐navigation
requirements and developments. Correspondingly,
GMDSSmodernizationworkshophasbeengenerated
and task force out of workshop has focused on
modernizationofGMDSSissuesasgiveninfigure4.
Accordingtomodernizationworkshop,Cospas‐Sarsat
system will be influenced from the GMDSS
modernizationaswell.BecauseitusesEPIRB
andits
power budget is not economically support both
homing signal in contrast with AIS (GMDSS
Modernization Workshop, 2010).Finally, we can
state that e‐navigation will be on the agenda of
GMDSSmodernizationquiteawhileandGMDSSwill
take place on ship to shore or ship to ship
data
communication network of e‐navigation concept.
Internetwillplayavitalroleinprocess ofGMDSS
development. The new data exchange protocols
enables to transfer big size sustainable data (Korcz,
2009). Due to such developmentsinternet based
data exchange from ship to shore and/or shore to
shore became possible such
as ship tracking,
monitoring pollution, route planning. There is
potentialforthefuturetocarryoutremoterepairing
& maintenance of electronical equipment on board,
intervenetooperationormanagementofshipincase
of need, remote company access, energy saving etc.
besidesofconventionaloperationalfunction.