What do you feel is most reliable, simple horn with thumb button switch for 16Ft. aluminum?

Any experienced issues with horn switch? Wiring issues? Shorts? Battery drain issues?

Thanks

Get a whistle. No wiring, works if your battery is dead, can't short out. 

Air horn in a can

Air horn in a can

X2, my boat has a horn, never use it, not loud enough. Air horn in a can

X3 the on the horn in a can.

Whistle can be attached to key chain..........horn in a can works well also but you must store/find it when needed..........Al

Thanks for the replies.  Yes, have whistle and air horn.  Seems boat horn never gets used much.

Thanks everyone.

I keep a whistle in a small utility box, and hand held air horn with a spare can of air in the junk storage box and my boat has an electric horn like most (American) vehicles have. As for battery drain etc, no problem there, the problem has always been reliability with the electric horn. Like anything on a boat that's seldom used, it tends to not want to work when it needs to.