Did you see Spanish Fly last weekend?
Jose Wejebe took a 39' SeaVee from Miami to Isla Mujeres, Mex.
that boat had 4, 300hp smartcraft Verado's on it. no electronic prob's on the nearly 900 nm. round trip.
If you wanted to help protect against that, buy the diag. program & laptop/pcm patch cable from Mercury, bring that & a multi-meter w/ you offshore.
Oh, & ALWAYS make sure you have a good mechanic on board!

(hint?)
fine ride, amigo. what model is the lowrance? sure looks good
mounted in the dash.
-B