Does anyone know of a simple & inexpensive iPhone / smartphone app for tracking multiple targets…??? (ie: yachts in a fleet).
“GPS Tracker” by Instamapper is ideal, but will only track one target. The idea is to have a public website that uses Google maps to display all the vessels in the fleet during the race. Normal phone coverage will do for most races up to 10 or 20nm offshore.
I've looked at a few others such as Endemo, “Cell Phone GPS Tracker”, “GPS Vehicle Tracker”, but they are either not suitable, only do one target, or just don't work……. Wasted another $1.19 of my kids iTunes vouchers 
There are specialised systems around, such as that developed by the CYCA or the “yellowbrick” system, but these have significant cost involved. Considering almost every yacht already has a tracker (iphone / smart phone), how hard can it be….????? 
Many thanks!!
Poods 
Very good Idea Poods , Fun thing for club races!!! and good safety aspect for same .
come on all you shiney bum boffins bang out another "app"!!!
I've been trying GPS lite by motionX, free tracker app. Tracks one target very well. You can watch multiple targets (eg: yacht fleet) on the app if you all use the same channel. Apparently it can also broadcast to facebook, but I have not been able to get this to work :-( I can't get the motionX app to install at the facebook site.
Anyone alse got any helpful suggestions....???
Poods 
