A Shot Across the Bow

From publisher blurb:

The 19th issue of Populated Hexes Monthly continues to look at naval rules for Old School Essentials and old-school gaming. This issue takes the information in Issues 16 and 17 and applies them to naval warfare. In this Issue, the rules allow each player character to take on a shipboard role on a single vessel within combat. Issue 20 will present simple mass combat rules for large-scale naval engagements.

Issue 19 includes scaled vessel tokens that can be printed out, colored, and used on a battlemap.