ADJ.
used
VERB + SATNAV
doesn't, got, hasn't, hire
PREP.
with
noun
A satellite navigation system.
A satellite navigation system receiver.
A civilian GPS receiver (“Navstar receiver”).
Tom has a hire car with satnav.
Tom's got a hire car with satnav.
I did not know how to get to my friend’s house so I used my SATNAV to get driving directions.
My car doesn't have a satnav.
My car hasn't got a satnav.
i Register
In some senses, satnav is marked as informal. Watch for register when choosing this word.