Wave dynamics is interesting. One thing of note is that while wave crests can jack up high the opposite is also true. The troughs can also get very low. This is referred to as wave holes and is probably more dangerous than tall wave. The bow of the ship drops into a deep trough and stuffs into the face of the oncoming wave. I’ve flown alot and sailed a little and the ocean is far more dangerous than the sky...
The Seas can be a nasty unforgiving mistress, but you aviators have your dangers, also. If our equipment fails in calm seas, not much problem with a ship bobbing about. Your equip fails...well. Plus, you have your atmospheric issues.