Posted: 18/09/2014 at 15:53
Some people do take cameras !
I remember Slotwin saying a Marshall thought she was wearing earphones (it was in fact the strings of her hat) so the no mp3 rule is enforced (although the roads are closed, there are still bail buses and some roads are pretty narrow).
On a purely practical basis any electronics would need to be in a waterproof bag, ziplock bag from Tesco would do. It gets hot and people squeeze water over them (I.e. even if you didn't, there would be splatter from the nearby runners). I did take my phone in my belt this year but it was in a baggie and, apart from a start pen photo, it didn't come out until the finish. All my energies were going on reaching the finish safely!
I don't think taking a phone or camera out for the odd pic would be a problem as long as it was out of everyone's way.
But back to sports watch stuff.
For Comrades TBH a ??10 watch will do - you don't *need* a GPS.
Because the markers are in km to go, you just go, (for example)
* the time is 15:30
* I am at 21km to go
* I therefore have 3h to do 21km in
* I will be OK but can't walk yet
* time is 1530
* @17km to go
* I can walk to the finish
That said the 310xt is cheap now and has battery life to spare - mine is over 3 years old and still lasted through an 11:46 Comrades (uuurgh).