|Image from Smithsonian Institution|
In reality, the navigation facilities of the 12XL made it hard to pre-programme routes due to a limitation of 20 waypoints per route. Mapping software was also costly pre-2000 and it wasn't feasible for me to carry a laptop to review maps on a trip. Thus I tended to use the 12XL as a logger and input a few key waypoints where I anticipated problems. Of course, I also referred to it to get a grid reference when I needed a little encouragement. I also found that I could usually relate it to a map bought overseas either via an official datum/reference system or by a combination of trial and error and use of an unofficial reference formula inputted to the 'user grid'.
Three years ago I moved to using a Holux logger which despite my reservations has been a good workhorse, although recovering the data isn't intuitive. As a pure logger this has no utility in navigation. I also consider that the storage format is excessively 'lossy' resulting in poor detail of recorded tracks.
|From the review by DC Rainmaker|