4.1.1 The following onboard maintenance should
be carried out monthly and after any fault condition:
4.1.2 Additional maintenance should be carried
out as specified by the manufacturer’s instructions.
4.1.3 The maintenance and testing described in
paragraphs 4.1.1 and 4.1.2 should be included in the maintenance plans
required by SOLAS regulations II-2/14.2.2and II-2/14.4.4.
4.1.4 Computerized systems should have a self-test
function to monitor the following on start-up and repeated at least
once every 24 h:
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.1 power supply; and
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.2 volatile memory.