After the scene, Zael and company will have full run of the former Gurak Warship which has been taken over and converted! There are shops for everything and a Summon circle in the captain's cabin (where the party fought Muruu) through the door on the back half of the ship and up the stairs. There are a couple chests in that room as well.
Head to the front of the ship, through the cabin for a scene with Calista. Head back out and up the stairs to the back of the ship (where Dagran is standing) to trigger another cut-scene after this. One of the men below deck will say that the ship is taking on water and needs repairs. Scan the horizon to find an island to land at.
Chapter 13 is next.