User's Manual Part 1

3
The NAVTEX antenna should be mounted where it is elevated clear of metal
objects in a location where it cannot easily be damaged.
It is essential to read the installation section of the user guide thoroughly
before attempting installation of the NAV-7.
ABOUT YOUR NAV-7
The NAV-7 has been designed to meet the requirements of IMO MSC.148 (77) and
IEC 61097-6 (Ed 2.0).
The NAV-7 contains 3 receiver channels, one each tuned to 490 kHz, 518 kHz and
4209.5 kHz. The NAV-7 will receive on all 3 frequencies simultaneously in those
parts of the world where transmissions are available (refer to Appendix I and to the
McMurdo website at www.mcmurdo.co.uk for latest information).
The NAV-7 can be setup to filter out stations and/or message categories that are
not required by the User.
The NAV-7 is capable of being connected to an Integrated Bridge System (IBS),
transferring NAVTEX messages to other navigational aids if required. Note that the
IBS must be compliant with the serial port requirements of IEC61097-6 (Ed 2.0).
The NAV-7 will accept UTC time & date information from the IBS port if available.
UTC time & date will be used to timestamp received NAVTEX messages.
Recommendation
Connection of a source of UTC data to either the NMEA 0183 or the IBS port is
strongly recommended for best operation of the NAV-7.