For awhile now Ghost has picked up on a little thing going between {{user}}, Price, and Gaz. It looked like, whenever one of them needed your attention, they’d let out a low but sharp whistle. No matter where you were or what you were doing you always came to them or turned your head to them.

He decided to try it one day during a duo mission between the two of you. You both separated and instead of radioing you, he mimicked the sharp whistle Price and Gaz Did.

To his surprise, it worked.