2. Navigation Tasks
2-4
2.3.3 Manual correction
User-executed position correction where radar echoes and information from synthetic charts are combined and
verified by the operator, and adjusted if necessary.
2.4 Monitoring
Monitoring is a continuous check of navigation data, user actions and performance of the system. Part of the
monitoring is also the display of electronic sea charts and conning information.
Monitoring
Data
logging
Data
distribution
Alarms
Electronic
sea
chart
Man
overboard
2.4.1 Display of electronic sea chart
The following information is available on the electronic sea chart:
Own ship position Chart alarms
Planned track ARPA targets
Planned safety lines Chart information
Ship’s predictor (See paragraph 28.13.)
2.4.2 Alarms
The following alarms are incorporated:
Route monitoring alarms Alarms for sensor failure
Position calculation alarms Alarms for system failure
Position monitoring alarms Alarms for incorrect operator action
Waypoint approach alarms Alarm based on chart database
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