Level 3 warning



A Level 3 warning is a type of security protocol alluded to in Metroid: Other M. The Bottle Ship P.A. Announcer states that it is in effect in the Biosphere, and advises the inhabitants of the Bottle Ship to avoid traveling alone, remain armed, and stay alert to their surroundings at all times. Whether or not this had anything to do with MB is unknown.

It is only in effect in the Biosphere, as a Level 4 warning is in effect in Cryosphere and Pyrosphere.