From publisher blurb:
When Sea Is Calling is a system-neutral OSR-oriented guide for (non-historical) nautical adventures. It is intended for both DMs and solo players. With it, explore the surface and the dark depths of the sea, meet its strange inhabitants, lift terrible curses and get your hands on fabulous treasures!
The purpose of this book is not to generate a sea map. Instead, it is meant to be used with a pre-existing one (and is compatible with Sandbox Generator). The aim of this supplement is rather to generate encounters during sea voyages.
This book contains procedures, generators, tables and examples for:
Sea encounters,
Ships (flag, figurehead, crew and name),
Handling ships (combat, trade, upgrades, etc.),
Pirates (name, appearance, items and story),
Original sea monsters, with stats,
Curses and legends,
Beach finds,
Fishing (with bad situations and catches),
Whales (encounters and hunting),
Coastal towns (description and import/export),
Underwater exploration,
Mermaids (with situations),
Navy's secret weapon (description, attributes and situations),
Intrigues,
Retiring characters.
The following maps are also included:
Generic caravel and frigate,
Hexcrawl example,
7 islands,
Treasure island,
Giganphare (dungeon),
Mermaid palace.
Now, are you ready to set sail?