Laptop as monitor for Montana 600

[Scoutfollower]

is there a way to use a laptop as a much larger screen for my Montana 600? I am using map software (chip) for hunting (onyx hunt maps) that require a garmin device and it runs fine on the 600, it's just too small to make good choices quickly.
I've tried searching and all I can find is how to use the NMEA data from the gps to the laptop...or downloading data from the gps to a laptop after a trip....nothing about a way to get a larger screen.
I can make my laptop into a gps.....but I cannot use the hunting maps without certain Garmin devices......that's the conundrum.
Any ideas?
It seems so logical, there must be some catch I'm not thinking of

 

[Nuvi-Nebie]

Sorry, you can't 'send' an image of the GPS screen to another device such as a laptop, the difference is that a laptop is user programmable and the GPS isn't. I'm guessing you need a bigger screen when planning, as it wouldn't be very practical taking a laptop with you on a trip, it might be possible to use the Onyx maps on your GPS when it is connected to a computer running Garmin Basecamp, this is possible with Garmin maps, but the Onyx ones may be locked to prevent this. You would then be able to plan a trip on Basecamp and then send it to your GPS. Alternatively you could run the Onyx maps on another platform such as an Apple or Android device with a bigger screen, there is a link to Onyx Mobile Apps. HERE

 

[Scoutfollower]

Nuvi, thank you re the reply, I've used my iPad with a Bluetooth gps node and that is about the smallest screen for In vehicle use that is practical. However there isn't enough memory in my iPad to store more than a few dozen sections, when we are scouting an area we drive many miles of roads, knowing legal hunting ground is important but we had many instances where I hadn't downloaded enough of the area because I ran out of memory or time (it takes literally hours on a hotel wireless speed to download) and yes, I planned to mount the laptop in the vehicle.
I guess I'll keep looking.