I know this is probably too much information, but when I bought the "Deckman" tactical software program, it comes with the ability to broadcast wireless info to a PDA or tablet. We have a laptop hooked up at the nav station with the instruments and gps plugged in through a serial port. Potentially, I could beam any information I wanted up to the pda.
I haven't done it yet and, quite frankly, I'm still learning the program. But as you can ping the start line, the program calculates approach angles to the line and ETA, which would be helpful to have in the cockpit as opposed to having someone below shouting out times. I know from research that the waterproof tablet PC's are pricey -- in the range of $2,000. eek.
By the way, I bought the C-Map charts for the entire west coast of north america to load into the laptop and it cost under $200.
Jim McCone
Voice of Reason E-32-2 hull #134
Redondo Beach, CA