i would like to buy a gps for my bike but find it hard to justify the cost( and sneak it past the missus). what i was wondering, is there a gps available where you can mark multiple spots in a paddock and return to them at a later date. i spent a couple of days last week wondering around a 250 acre grazing block on my tractor spot spraying rats tail grass which is very hard to see at certain times of the year and you have to keep going back for years until you wipe out the seed. now,if there was such a device not only could i use it on my bike,but i could use it on the farm and claim it on my tax. cheers charlie. ps,mods if this needs shifting,go for it.