We would be pleased to plotter you own device,virtually anything but apple.
As a guide only here are the costs of a windows system
30.00 uk charts
20.00 decent waterproof gps
20.00 decent 12v charger
00.00 for software
50.00 for complete global rasters,over 25000
10.00 post/pack
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130.00
A a.i.s. receiver added,with its antennas ranges from £75.00 for a simple usb dongle with antenna to £130 for a wireless gps and a.i.s.with multiplexer,again power supply/antennas inc.
For a android tablet system..tablet must have real gps.
15.00 charts
10.00 app,inc a.i.s. ready
05.00 decent 12v charger
10.00 stand/holder corner to corner
05.00 decent mains charger
05.00 post pack
==========
50.00
a.i.s. receiver kit for tablets is £100
contact steve via contacts page