This is related to issue 39: http://code.google.com/p/monav/issues/detail?id=39
The gist is, that MoNav currently uses QtMobility to provide GPS
information, but QtMobility only does so for mobile devices.
Luckily Thomas Hiller provided an interface for gpsd which will most
likely fix this. This will be available in the next major version of
MoNav ( 0.4 ).
Best regards,
Christian Vetter