The Mk II Bridge (also known as the GF Bridge) is a type of bridge created by the Galactic Federation. There is only one that is ever found in the Metroid Series, found in the room Industrial Site in Metroid Prime 2: Echoes. When Samus first finds this bridge, it is locked in place and must be lowered in order for Samus to use it. Samus can lower it by scaning a nearby Interface Module and then shooting the two Armored Security Locks that are keeping the bridge in place. The bridge will fall into place and Samus can cross the bridge.
Mk II Bridge
Metroid Prime 2: Echoes
Mechanism: Mk II Bridge - Portable bridge system. This bridge is durable, but often locks in place, leading the Marines to call for a new design.