Computer Systems & Software Updates Flashcards

A vessel's propulsion control computer shows repeated 'memory fault' errors after a software update. Which component should the technician investigate first?

Answer: The RAM modules installed in the control computer

Memory fault errors point to a RAM problem; the installed RAM modules should be tested and reseated or replaced as the first step in diagnosis.

In a marine environment, why is it important to use ruggedized or marine-grade computers rather than standard commercial PCs?

Answer: Marine-grade units are designed to withstand vibration, humidity, and salt air

Marine-grade computers are built with sealed enclosures, conformal-coated circuit boards, and vibration-resistant components to survive the harsh marine environment.

What is the purpose of a software 'version rollback' capability in marine electronic systems?

Answer: To revert to a previous working version if a new update causes problems

Rollback capability allows technicians to restore a previous stable software version if a new update introduces bugs or incompatibilities.

Which cybersecurity practice is most important when a marine vessel's computer systems connect to shoreside networks for software updates?

Answer: Isolating update traffic on a separate VLAN from operational systems

Network segmentation using VLANs ensures that update-related internet traffic cannot reach critical operational navigation or machinery control systems.

A technician notices that a vessel's Integrated Navigation System (INS) clock drifts after each software restart. Which system component is most likely faulty?

Answer: The real-time clock (RTC) battery on the motherboard

A failing RTC (CMOS) battery causes the system clock to reset at each reboot because there is no power to maintain timekeeping when the main supply is off.

What is the significance of an 'end-of-life' (EOL) designation for software running on a vessel's navigation computer?

Answer: The manufacturer will no longer provide security patches or updates

EOL means the software vendor has stopped releasing security patches, leaving the system vulnerable to exploits and non-compliant with emerging regulations.

During a bridge console software update, the technician observes that the update requires a system reboot. What is the correct procedure on a vessel at sea?

Answer: Coordinate with the officer of the watch to ensure redundant systems are active before rebooting

Any reboot of bridge systems at sea must be coordinated with the OOW to confirm that redundant navigation systems are operational and the vessel is in a safe situation.