NFAL/NREC - Fail/Recover NavAid

Send

Fail a navaid by sending NFAL with the navaid id.:

navaid = 'NOLLA (SEATTLE) NDB'
msg = struct.pack('<4sx150s', b'NFAL',
                  navaid.encode('utf-8')   # remember to encode string as bytes
sock.sendto(msg, (beacon['ip'], beacon['port']))

Note

With XP11, the naviad “name” is used, which matches a value in the file Resources/default data/earth_nav.dat. This is not a traditional naviad ID, so for now, you’ll need to see how the navaid is listed in that file.

With XP12, the navaid “id” is used, which matches the value in parentheses as listed in the Failures section of the Flight Configuration page. For example, near Seattle it lists:

SEATTLE VORTAC (SEA)

SEATTLE VORTAC DME (SEA)

SEATTLE-TACOMA INTL DME-ILS (IBEJ)

You can fail ‘SEA’ which will fail both the VORTAC and the DME functionality. You cannot fail only one (via UDP). You can only fail navaids within the current region (about 4 degrees longitude, and 3 degrees latitude).

Send

To recover a navaid by sending the NREC command with the same navaid id.:

navaid = 'NOLLA (SEATTLE) NDB'
msg = struct.pack('<4sx150s', b'NREC',
                  navaid.encode('utf-8')   # remember to encode string as bytes
sock.sendto(msg, (beacon['ip'], beacon['port']))