A Squadron with the Ambush MAR may be deployed using the Hidden Set-Up rules found on Page 38 of the Rulebook.
However, rather than only having one Hidden Set-Up Marker, you may place a number of Markers equal to the value of this MAR on the Board. Only one of these Markers has the Squadron name recorded on it, the others are left blank. When a blank Marker is revealed, nothing happens – the Marker is simply discarded.