Is it normal to get speed spikes, I seem to everytime I use my navi, I have the latest firmware installed from Mt Best and use Realspeed 1.92. some are easy to spot and I just delete that run in the lower window of Realspeed and let it recalulate my data. Is that what I'm supposed to do? Others are not so clear cut for instance yesterdays Breakwater to Beacon race the navi showed a max speed of 22.45 but realspeed showed up 2 max 2 sec 1 at 27.17 and 1 at 24.05 What is the general rule when analizing and deleting the data. Ive started uploading onto the GPSSS site so I would like to think my data is accurate, not that I am going to break any records I apologise if this has been covered before.