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L-3 ELAC Nautik
4.5 MENU DESCRIPTION
4.5.1 THE ALARM MENU
To call up the ALARM MENU, press the ENTER key once.
This MENU is used to set, select or test the following:
• Select NAV-Defaults
• Set Minimum Depth Alarm
• Set Maximum Depth Alarm
• Test the Alarm system
NAV-Defaults
NAV(Navigation)-Defaults are basic compulsory settings which must be used when operating the
system for navigational purposes. These are laid down by the International Maritime Organisation
(IMO) and state that:
• The system must operate with one channel only
• The sound velocity must be set to 1500 m/s
• The unit of measurement must be metric (metres)
• Water depth must be measured below the keel (DBK)
If the system is being operated in any other mode, e.g. units selected are feet, water depth from
the surface is selected etc. the user can return to the NAV mode by calling up this MENU and
selecting NAV-Defaults. A sub menu will appear in which the user can choose between selecting
NAV-Defaults, or returning to the ALARM MENU. The sub menu can be seen overleaf.
NAV-Defaults >>
Alarm
Depth 0020 (0....1999m)
Status ON (ON, OFF)
Alarm
Depth 0410 (0....1999m)
Status ON (ON, OFF)
Test Alarm
ALARM