Don’t despair if you can’t find it, though – they use the same mini USB lead that most (non-Apple) phones come with.
Alternatively you can update with a one-off map for £50.
A European map update for a Tom Tom device is around £50 per year, and allows four updates in that 12-month period.
Then again, maybe it isn’t so odd, because the RAC’s new range of three sat-nav devices is its first real foray into this area.
Yes, there was a single device launched last year, but it was more of a quiet toe in the water than a big launch.
City planners surely exist only to confuse and befuddle us, closing the best route to work for endless repairs and turning town centres into seemingly inescapable mazes of one-way streets.
Actually, that’s a bit unfair as the changes normally make it better for everyone in the long run, but in the meantime it can be quite frustrating.
In that time countless changes could have occurred to the world’s roads.
Updating a sat nav requires a little bit of legwork; you’ll need to physically connect the sat nav to a PC or Mac using the lead that came in the box.
If you own an older device which doesn’t come with free maps, don’t fret – you can still update it but you’ll need to pay for the privilege.
How much depends on the area and type of maps but, as an example, lifetime European maps for a Garmin device can be purchased from the company’s website for £75.
The latest Best Buy sat navs – read our in-depth reviews A sat nav is a great driving tool but, like your phone or your PC, it’s important to keep it up to date.