We used to have such a system in the Jaguar - since it's been retired from service now, you might get hold of a manual somewhere. (eBay?)
One of the peculiarities of it was that it put the aircraft in the centre of the map - just what you need when flying low level at 350+ knots (not that I ever got to sadly) - by and large it's what's in front that interests you and you spend approximately no time looking behind you!