Baseplate

"Baseplate, this is Big Bird. Package secured, returning to base. Out."

- Big Bird at the end of "Crew Expendable".

Baseplate is the S.A.S. command base, where Bravo Six received radio commands from regimental commanders.

Call of Duty 4: Modern Warfare
Baseplate is mentioned several times by Gaz and Captain Price throughout the game, although never actually seen. Baseplate is mainly heard from in the last few campaign missions of the game.

Trivia

 * Sometimes it says "Command" in the subtitles, instead of "Baseplate".
 * Baseplate is most frequently heard during the campaign mission Game Over, when the team calls for assistance.