The Ectheldur
The Ectheldur was the legendary banner-ship of Arnor, and was once the pride of the fleet of Annúminas. Lost long ago to the waters of Lake Evendim, it was said that a treasured artifact of the Dúnedain was kept within the Ectheldur during it's last voyage.
Tarneth, one of the Rangers of the North based in Tinnudir, has made it her life's work to rediscover the shipwreck, and recover it's precious cargo. Aiding her in her search for the Ectheldur is a task that burgeoning Mariners will undertake during their adventures.
Though not directly shown or interacted with in the questline, the Ectheldur nonetheless can be spotted resting at the bottom of Lake Evendim off the coast of a small island, undisturbed for nearly 2,000 years... [14.5S, 73.6W]