Real World article
(written from a Production point of view)

Mentioned in the final draft script of the Star Trek: Enterprise episode "Similitude", a suspensor coil was a component of an ocean skimmer.

When Charles Tucker III had been young, the suspensor coil on his father's ocean skimmer had been out of phase, which Tucker had pointed out to his father, determining why the craft hadn't been working properly. This was later remembered by Sim, in conversation with Captain Jonathan Archer, while flying a remote controlled model spaceship.