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L-3 ELAC Nautik
4.3.3 WARNING FIELDS
Three warning fields are provided on the display:
• NAV OFF flashing indicates that one or more parameters do not correspond to the
navigational mode, i.e. the user has selected other units, sound velocity or depth
mode.
• NAV OFF whithout flashing appears in the 2 channel mode. It is a hint, that in this
display mode the user has to observe, that for instances dedicated digital slave
repeaters are in use.
• POWER ERROR occurs when the supply voltage of the echosounder unit
undergoes a value of 100 V AC. This is an internal alarm, the POWER ERROR field
flashes and an acoustic alarm ( with mute control ) is activated.