Probably for marine use it might be a little out of place unless of course you have use for worldwide Jeppesen aeronautical data-base of airports and VOR's, Glide ration calculator, gives True AIRSPEED plus a few other aircrafty things.
But it does have a MOB (Man overboard) button

Now that's what all aircraft should have "Man Overboard"
Apart from that I think they were only a 3 channel capable of tracking only 8 satellites, which by today's standards is a little outdated.
Really for the application intended (marine) there's probably more suited receivers than this one but at the right price they'll all do something better than nothing.
Cheers, Kerry.
I never get lost, everybody tells me where to go!