User's Manual Part 1

Alarms

The message category is used to classify the nature of each NAVTEX message. Of

particular note are message types 'D' (search and rescue), 'A' and 'L' (navigational

warnings) and 'E', 'B' and 'C' (meteorological warnings). When a message with any

of these message categories is received the NAV-7 operates its alarm relay

contacts and transmits an NMEA "ALR" sentence to the currently selected alarm

port. The alarm relay continues to operate until the alarm is acknowledged either by

removing the popup or by reception of an appropriate NMEA "ACK" sentence from

another connected device. Search and rescue messages (category 'D') cannot be

read later; the popup box can only be cleared by pressing the Enter key and

reading the message.

Finding and viewing NAVTEX messages

The NAV-7 displays NAVTEX messages in several ways designed to make finding

and viewing particular message categories or an individual message easy and

convenient.

Message Index

Message Summary

Full Message