The plot of this Dungeon adventure is basically “let’s take a bunch of NPCs who’ve never been on either a ship or a farm, land them on Oerth’s version of Skull Island, and call it a colony WHY ARE THINGS GOING SIDEWAYS?”
Luckily for our heroes fate and play tests mean very few challenges in this module are likely to take out the hull/rigging/helmswoman. It’s all stuff like a horrible chaos phage infection, nori flavored shambling mounds, and untrained Profession (Sailor) checks.