UK post codes cover quite a small area in reality, even in the wilds. If you want to see a huge area, try a French one.
I no longer have a Navigator VI but isn’t the method (I’m using my XT) the following:
Home Screen > Where to > Address > Post Code > Enter post code > Enter house number (you don’t have one, so just hit Done) > Search Results > Hit ‘i’ (for information) > Map will pop up > If it looks about right > Hit Go. You can skip the ‘i’ stage if you like and just hit Go.
I have just used the same method on my Navigator V, where it works, too. I am pretty sure I would use the same method on my Navigator VI, were I to still own one.
I have just tested this method to get pretty close to my sister’s house (it’s a farm in rural Warwickshire) which has a post code but no actual house number or even a street name.
As a further test, I also plucked Walton Miniature Railway at random off the internet, simply as it has no house number. Its address from its website is:
HALTON MINIATURE RAILWAY Town Park, Palace Fields, Runcorn, Cheshire. WA7 6PT
By putting in just the post code and following the method above, I was able to get close enough.
I was also able to get pretty close to this address, plucked at random from the internet as it has no house number:
Woodland Trust. Registered office: Kempton Way, Grantham, Lincolnshire, NG31 6LL
And this one, plucked at random from the internet again, simply as it has no house number.
The Fife Arms hotel, Mar Rd, Braemar, Aberdeenshire, AB35 5YN
Based on those tests, it works. As usual, play around, you can’t break it. It’ll give you confidence that (more often than not) it will work.
PS
Give it any old number
I have used that method too, in the past.