a) will do what I want,
b) is in stock and available to buy
c) doesn't cost a small fortune and
d) isn't overly complex.
We bought ourselves a Garmin Etrex handheld GPS last year believing that it would be compatible with Ordnance Survey maps in digital format e.g. Memory Map - How wrong we were. Since then I have been looking for a device that would load a digital Ordnance Survey map and have a large enough screen to make its use viable. A PDA would have been ideal but there has been a steady move away from straightforward PDA's to I-Phones and tiny laptops - i.e Notebooks. I had settled on a Mitak Mio P360 as the best buy for what I wanted but you cannot get them for love or money and it looked as if it was going to be an I-Phone or nothing.
So, while trawling the net again yesterday I was delighted to come across the Road Angel Adventurer 7000
This GPS is dual purpose, operating as an in-car navigation system or as robust and waterproof hand held that you can load OS maps (Memory Map) on to. So I think I've got it, the very thing that I wanted, a rugged GPS that displays an actual map that an idiot like me can follow. All I have to do now is get my hands on one.
Update: I have bitten the bullet and ordered one from AtoZ!!!