483
1 INTRODUCTION
ECDIS is a complex, safetyrelevant, softwarebased
system with multiple options for display and
integration.Theprimary function oftheECDIS isto
contributetosafenavigation.
ECDIS should always have at least the same
reliabilityandavailabilityofpresentationasthepaper
chart published by government
authorized
hydrographic offices. In such case ECDIS units on
board are required to comply with one of two
performance standards (either IMO resolution
A.817(19), as amended or resolution MSC.232(82)),
dependingonthedateoftheirinstallation.
Essentially,whereanECDISisbeingusedtomeet
thechartcarriagerequirementsof
SOLAS(regulation
V/18,V/19,V/27)itmustbealsotypeapproved,use
uptodate electronic nautical charts (ENC), be
maintained so as to be compatible with the latest
applicable IHO standards and have adequate,
independentbackuparrangementsinplacetoensure
safenavigationincaseofECDISfailure.
In
addition, all ENCs and RNCs must be of the
latestavailableeditionandbekeptuptodateusing
boththeelectronicchartupdates(ENC)andthelatest
availablenoticestomariners.TheECDIS,eitherwith
an ENC on display or operating in RCDS mode,
shouldbecapableofdisplaying
allchartinformation
necessaryforsafeandefficientnavigationoriginated
by, and distributed on the authority of government
authorizedhydrographicoffices.
ECDIS Limitations, Data Reliability, Alarm Management
and Safety Settings Recommended for Passage
Planning and Route Monitoring on VLCC Tankers
G.Rutkowski
TeekayLearningandDevelopmentCenter,Manila,Philippines
TeekayShipping,Norway
ABSTRACT: The purpose and scope of this paper is to describe the factors to consider when determining
ElectronicChartDisplayandInformationSystem(ECDIS)limitation,datareliability,alarmmanagementand
ship’ssafetyparametersettings.Fortheoptimumsituationalawareness,navigatorsmust
alwaysrecognizethe
levelofdisplayforobjectspresentedwhenusingECDIS.Thevaluesforthesafetydepthandsafetycontour
must be understood and entered to achieve a sensible and considered meaning and alarm settings. The
navigatorsmustrememberthatthedisplayofunderwaterobstructionsorisolateddangersymbols
canchange
accordingtothesettingsofthissafetycontourwhichalsomarksthedivisionbetweennavigable(safe)andnon
navigable(unsafe)water.Impropermanagementofthesystemmayresultintheantigroundingalarmsand
otherindicationsfailingtoactivateasrequiredforthesafeconductofthenavigation.Consequently,
itcould
giveafalseimpressionofsafewatersaroundthevesselwheresome dangers maynot be showndueto the
limitations imposed by original chart scale. This paper recognizes the limitations of ECDIS display, the
significanceofappropriatesafetysettingsaswellasthealarmmanagementrecommendedfor
passageplanning
&routemonitoringonVLCCtankers.
http://www.transnav.eu
the International Journal
on Marine Navigation
and Safety of Sea Transportation
Volume 12
Number 3
September 2018
DOI:10.12716/1001.12.03.06