system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:how old ships could see each other at night

how old ships could see each other at night?
gpt
Like today ships were required to have lanterns with different colors around the ship to allow nearby ships to see them better. Ships also used lookouts who were not exposed to light so they are accustomed to the dark and can see objects using the stars and moon as lighting. Also a lantern would stick out quite much in a dark environment.