"Luc Habert" wrote in message
...
Daniele Fua :

what I need is just a simple, cheap and weatherproof repeater at the
helm

I am affraid the weatherproofness and the general robustness are hard to
achieve, and you will be better off buying a moderately expensive
commercial
product.

I am a big fan of the TackTick products: you just plug inside the boat an
nmea receiver that forwards over wifi the data it receives, and then you
can
hang as many wireless repeaters as you like in the cockpit. The repeaters
are entirely wireless, using solar power (they have enough battery to run
through the night), and wifi to communicate with the base.

One minor correction: TackTick does not use Wifi to communicate. That would
simply be impossible with solar powered instruments. They use their own
extemely low power RF system.

Meindert

"Meindert Sprang" :

One minor correction: TackTick does not use Wifi to communicate.

My bad. BTW, the large TackTick units can display at most two data
simultaneously, but there is a remote control, which, apart from enabling
you to switch the data displayed, has a screen on which it displays a large
number of data simulateously.