Cycle computer (2)

I’m in the market for a new computer thing to put between my aero bars.
What do I buy?
In the ideal world it would work on the bike, on hiking trails, when I go fishing off shore and maybe even replace the after market garmin in the car. It would have good colour maps, be accurate, have decent battery, Fi D record fish etc etc.
does this exist?
Should I just buy a lottery ticket?
And can it actually be operated by a blonde without a computer science degree?
oh yeah its reasonable weight and readable in sunlight