beacon
n//ˈbiːkən//vårdkase, böte, båk, sjömärke, landmärke, röse
A signal fire to notify of the approach of an enemy, or to give any notice, commonly of warning.
(nautical) A signal, buoy, post, or other conspicuous mark erected on an eminence near the shore, or moored in shoal water, as a guide to mariners, particularly to warn vessels of danger.
A high hill or other easily distinguishable object near the shore which can serve as guidance for seafarers.