Doc said:Thanks for that Adi.
I see there are a few geocaching caches near me.
As I have no PC cable yet, I guess I need to enter the cache location as a waypoint manually: Am I right in thinking that cache co-ordinates use the WGS84 datum? So should I select WGS84 and enter the coordinates as lat long?
Yes. Cables are easy to get or even make ... if you go over to www.lynks.co.uk you can find the Pfranc connector - make a pledge for one and they'll send them out to you. Chop up an old COM port cable and away you go! Really cheap and effective. This makes life easier and you can move co-ords to the unit a lot easier.
Also, does it use more power when its 'working hard' eg, plotting speed and location of a fast car, compared to just sitting there switched on?
No, the receiver is a 12 channel receiver and updates the screen and data every 1 sec, irrespective of whether you are moving or not.
Also, how can you check the position fix accuracy - Using OS 1:25000 maps I doubt I could resolve to much more than 25m anyway.
Not needed, but if you want you can always use a trig point - go to www.trigpointing.co.uk for info.
I'm also pleased to see it calculates sunrise sunset times. Nice feature.
Cool feature, innit!
Do you find its estimated accuracy to be reliable?
Reliable enough. You can expect 10 m accuracy under good conditions. It's just an estimate but it's normally quite good.
I'm told the altitude data is not particularly reliable - any comments?
True. Altitude data is a bit flaky simply because most of the sats are above you - the clearer the horizon the better the altitude data, but even then it's always going to be less accurate than a positional fix.
Sorry - the persistent questioning of a man with a new toy!
Enjoy your toy!!!!! :biggthump