A way down into the hull

Below decks, a hatch leads down into the ship's hull, but it's nailed shut.
Nudge 1Where to look
Something to prise it open with. Very strong.
Nudge 2A stronger push
It lies on Bridge Street, in Keldor.
What you needOther problems to solve first
Solve these first (each opens its own page, no answers on the way):
Show the solutionThe whole answer, with a video
Bring the very strong crowbar (Bridge Street, east stretch) below decks and drop it on the hatch: it's prised open, and Dizzy can drop down into the hull.