Despite the temperamentalness of the things—we love ours.
All four of them.
Just because we love them doesn’t mean we trust them...
Our newest (and favourite) autopilot is the one that broke (unlike children it’s perfectly okay to favour one piece of electronics over another). So when my parents visited we sent the actuator home (it had salt water corrosion) with them for warranty repair.
They, being the type who pack light, stuck the arm in their carry-on luggage and went on their merry way.
Until they hit security.
The actuator may look like a boat part to us, but to the TSA it is a bludgeon. And the old folks, who look like typical tourists to my eyes, were clearly terrorists.
Terrorists with bludgeons are not treated well by the TSA. So after being thoroughly searched, having their luggage shredded (they had to tape it back together), and barely making their flight, they thought it was important that we mention to people that boat parts really belong in checked luggage.
Who knows what the TSA would make of watermaker filters or VHF radios…