Actual speed

[rovexCDTi]

Originally Posted by Rincewind

Don't rely on satnav's to give you accurate speedo readings as they're prone to delays and what not and it also depends on who's using the satellites too. If the military are mega busy, your sat navs will be affected!!

GPS satellites are passive, they cant be 'busy'. The only time they can be effected in that way is if they are being remotely reprogrammed or having diagnostics run on them and that is done individually, so as not to bring the system down. The effect on our GPS units at that time is extremely minimal, if there is even an effect.