Tool

Uncommon Divination

This set of instruments is used for navigation in the underground. Proficiency with a Spelunker's Sextant (a specialized form of Navigator’s Tools) lets you chart a ship's course and follow navigation charts. In addition, these tools allow you to add your proficiency bonus to any ability check you make to avoid getting lost underground.
Proficiency with a Spelunker's Sextant helps you determine a true course based on observing the gravity, magnetic north, and the signal ping from a magical beacon located at the Unders Ecological Institute. It also grants you insight into charts and maps while developing your sense of direction.

Components. Spelunker's tools include a sextant, a compass, a tiny silver bell, calipers, a ruler, parchment, ink, and a quill.
Survival. Knowledge of a Spelunker's Sextant helps you avoid becoming lost and also grants you insight into the most likely location for crossroads and settlements.
Sighting. By taking careful measurements, you can determine your position on a navigational spelunking chart.


Spelunker’s Sextant


Plot a spelunking course DC 13


Discover your position on a cavern chart DC 15

Cost: 15 Marks
Weight: 1 lb