When working out of Trinidad, on Supply boats at Galiota Pt. When passing the point outbound I ran into the confluence of the tidal stream and the seas went from smooth to eight footers. Needless to say complacency of previous runs in the same area added greatly to the error train that caused my computer to go flying off the console. The flying part didn't hurt the computer, it was the crash landing. Similar to jumping off a high building without a paracute.
So lash your computer down. It don't take much effort to do so if you have installed two Tie-down points for it and a bungee cord.