There are likely a few low cost consumer options around. Dated article, but something like this....
How To Track Your Vehicle on the Cheap
If you feel like using the grand-daddy of them all, there is APRS in the ham radio world.
https://en.wikipedia.org/wiki/Automatic_Packet_Reporting_System
Google Maps APRS In playing around with this second link, I found that a ham I know has driven to Manitoba recently.
Needs a ham radio license (not expensive to obtain, and relatively easy today), and equipment
can be relatively low cost to obtain/build. Once the equipment is in place, you usually have no monthly subscriptions to pay - strictly voluntary, but it is considered good form to help your local repeaters and clubs any way you can though, as in all of ham radio.
OTOH, with what some hams
choose to spend on radio gear...... it might be cheaper to post a 24hr/day security guard at the vehicle !
Rgds, D.
Edit - rainy day here.... that 2'nd link above has a link under Information,
Stations Currently Moving. If you try some of the names listed (opposed to call signs) you can find boats - saw two off Baltimore, one off the coast of Poland, and one near France. A few examples of what APRS can do......... D.