The International departure lounge in Darwin is a mess. With the checking of pax bags for fluids etc never been catered for in the design, there is only one x-ray machine, so every one has to line up and wait there turn, one by one. Then Customs usually only have 4 points open which further slows down the queue. I would imagine that with the prospect of 3 A320's departing within the hour, things are really going to get pretty tight, and three hurs might not be enough! I would imagine that the proposed terminal upgrade will improve international departures