[goodkarma]

>> To do this, the sub releases a similar buoy through its garbage chute.

This is technically incorrect. The garbage shoot is for weighted trash that gets flushed vertically downward. If the sub were going to launch a buoy it would send it upward via one of its 3" signal launchers (used for flares, other buoys, etc.)

[jonknee]

Though they did note that the buoy hovers for a while so the sub isn't below it when it rises to the surface. Considering the delay it could be deployed above or below the sub, but below may make more sense because it won't float up on its own.