.
I couldn't honestly see a pc lasting long on wee Silkie if it was used while on the move
I would get on one of the new generation netbooks with a solid state hard drive for internet access, with a pay as you go mobile broadband dongle (eg Vodaphone) and a wireless amplifier for pulling in unprotected wireless networks. For a netbook my current choice is the
Dell Mini 9 with WinXP and a 16Gb solid state hard drive. It is well-build with no spinning hard disk - usually the weakest component on a shipboard PC. You will be able to run a copy of CMap or something similar on that, which is available with worldwide charts for nothing if you know the right pirates.
Instrument-wise the ideal option would be
Tacktick - small, unobtrusive, no wires and you can easily take the system with you when you flog the boat and move up to something bigger. Cheapest wind/depth/speed option comes to £900 though. More realistically, get the
NASA Duet + windspeed from Allgadgets for £349.00 inc VAT
You will of course also need a GPS . . . a second-hand Garmin 128 or 152 from Ebay would fit the bill cheaply, and then, if your budget stretches to it, fit a cockpit repeater (se Allgadgets again). The cockpit GPS repeater is the best instrument (including the
shiny new chartplotter) that we have ever fitted.