You have three options really. The first and best, in our opinion (if you have a smartphone), is to download Waze, the free app. Waze works in the US. The biggest issue will be the roaming charges but you can pre-load routes when you're connected to wifi to save some data, but then you won't get the real-time traffic updates obviously. We'd suggest sorting out a data plan before you leave, either with your UK mobile provider or by using a US sim card when you're in Florida. Whatever you do, don't just leave your data on because it might run up a massive bill.

The second is to hire a sat nav out there. We'd google this option before you go to get an affordable price rather than pay extortionate costs to a car hire company. The third is to buy a cheap sat nav off Amazon. This Garmin Nuvi is £45 and has American maps installed, but you should browse to find something that best suits you before buying anything: amzn.to/2umYJvY