409977/B
29
TestingtheSU90operational
functionality
Topics
Checkingthetransducerlowerandhoistfunctionality,page29
Testingtheuserinterfacetoverifybasicfunctionality,page34
VerifyingSU90operationbymeansoftheBITEfunctionality,page35
Checkingthetransducerlowerandhoist
functionality
ThehullunitprovidedwiththeSU90isdesignedtolowerthetransducerdownbelowthe
ship’shullwhentheSU90shallbeused.ThisisakeyfunctionalityoftheSU90.Itisvery
importantthatthehoist/lowerfunctionistestedbeforetheSU90isputtooperationaluse.
Inordertotestthelowerandhoistfunctionalityofthehullunit,twotasksmustbedone
simultaneously.Twopersonsarerequired.
•OnepersonmuststayonthebridgeinordertooperatetheSU90.
•OnepersonmuststayinthesonarroomtoverifythattheTransceiverUnitstarts,and
thatthehullunitworksproperly.
Certainstepsinthetwoproceduresarelocationspecic.
•Thestepsmarked[Sonarroom]aredoneinthesonarroom.
•Thestepsmarked[Bridge]aredoneonthebridge.
TestingtheSU90operationalfunctionality