The Fog: On Board Pearl's Peril

From the introduction:

This adventure doesn't have locations; instead [it has] days and nights. It starts on the 2nd morning out of Narvik. The party will have met all of the crew by now and talked with most, though [one], Iago, is less friendly than most. Each day [Iago will] ask what the [player characters] are doing and where they are doing it.

User summary:

For low-level characters. This is a minimalist adventure that occurs during a presumably unremarkable shipboard transit of an expected five or so days.