Our men are tired of rations and want meat. The mountains are covered in millions of sea birds, so we decide to use our biggest gun with an explosive missile, and kill several thousand in one go.
By sheer luck, we dislodge enough ice to trigger a small local earthquake. The earthquake does what our guns cannot, and splits the mountain in two!
The gap is wider than the ship. Should we sail into it? But what if it closes up again behind us? Or what if further ice falls on the ship? Should we instead turn round and try a different route next year? Or do something else?