Something tucked away in the hull
In the hull, well below sea level, something lies in a slot near the stern that Dizzy can't seem to get to from inside the hull.
Nudge 1Where to look
The hull's east half isn't reached from its west half: come down into it from the deck above.
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
Go back up below decks and drop through the gap in its floor near the stern (towards the right): Dizzy lands in the hull's east half, by the slot. Pick up the sticks of dynamite: they're for the deepest tunnels of the mines (A wall in the deepest tunnels).