The font on this unit is large enough and easy to read at arms length. You could always go see one at your local retailer in person to be sure. Dog you are correct..it is probably water resistant even though its stated waterproof to one meter by the mfgr. I have had no problems with mine yet on the bicycle or the kayak or the Hobie 16 .knock on wood. As for accurate, I have tested it on the same Bike Ride routes I have been riding for 35 years and the thing is pretty much spot on.
I too had the understanding that the A.I. came with turbo fins already installed. Something must have changed. IMHO I think you would want turbo fins to move a hundred pound plus yak (not including gear and pilot weight) with the single mirage drive . Here's what Matt Miller posted a
few months back... TURBOS would be "STANDARD EQUIPMENT"
The ST Turbo is shown as standard equipment. Not due to weight of the boat, but the speed. The standard fins would be ineffective as the boat accelerates. Matter of fact... the ST Turbos become ineffective due to speed under sail too. They help you get moving, then the sail power takes over. The fins go into neutral.
Hobie Cat USA
Anway I have a Tandem with two mirage drives that have Turbo fins installed and two pair of standard fins as a backup, so I got it covered either way, but my understanding was the A.I. came with turbos..