Pika256 t1_jdx1kz0 wrote
Reply to comment by Vlacas12 in TIL that the red lights on top of tall buildings in cities are called “aviation obstruction lighting,” and are used to help pilots of low-flying aircraft avoid collisions with otherwise hard-to-see structures. by bearjew64
I love being randomly reminded that sub exists.
Viewing a single comment thread. View all comments