Celestial Sextant

Wondrous item, uncommon (requires attunement)

The ancient elves constructed celestial sextants to use as navigational aids on all their seagoing vessels. The knowledge of their manufacture has been lost, and few of them remain.

A creature that possesses the sextant and is attuned to it can determine its latitude and longitude in one minute, provided it can see the sun or stars. It can also simultaneously steer up to four vessels that are within one mile of the sextant, provided their crews are willing. The creature must have spent at least an hour aboard each of the controlled vessels, performing activity similar to becoming attuned to them (but the vessels themselves don’t need to be magical).