Now the signal it was made for the Grand Fleet to anchor,
All on the Downs that night for to meet;
Then stand by your cat-stoppers, see clear your shank-painters,
Haul all your clew garnets, stick out tacks and sheets.

Somebody want to explain cat-stoppers, shank-painters and clew garnets? The DT has just plain old "stoppers," but I've always heard it sung "cat-stoppers."