If a ship lands on a mine that has a fuse on it does the mine go off after the fuse is removed as the ship is still on the mine and this then meets the requirements for the mine being detonated.

Rules reference:

„Q: How do fuse markers (pg. 11) interact with Mines?
A: If a ship would move through and/or overlap a fused Mine, one fuse
marker is removed from the mine and it does not detonate, even if the ship
remains physically on top of the mine after the fuse marker is removed.
If a ship is physically on top of a mine that did not detonate because of the
effect of a fuse marker, and it moves through and/or overlaps that mine
again during a later move, the mine detonates as normal.“

Also, it may be helpful to review the Replacement Effects section of the Rules Reference , on page 2. Most notably...

Quote

When a replacement effect resolves, the replaced effect is treated as having not occurred.

Since you're replacing the effect of a mine detonating with the removal of a fuse marker, the mine does not detonate. Subsequently, if that ship overlaps or moves through the mine, it will detonate (unless Captain Nym says otherwise, of course... but that's just another example of a replacement effect).