The fourth magnet, or set of magnets, is to correct the compass in case of severe Heeling by the ship.
"Lectures in Navigation"
Ernest Gallaudet Draper
The horses and dogs, Heeling and wHeeling them, and the trampling hoofs of the herd, beat a wraith-like mist from the cold, and still sleeping earth.
"The Pioneers"
Katharine Susannah Prichard
The smell of fish is strong in the air; the fishing-boats lie in neat rows, supported by legs to prevent their Heeling over when the tide runs out.
"Cornwall"
G. E. Mitton