A little personal story about this. Several years ago I left active duty and joined the National Guard and went off to Ft Campbell, KY for our two week annual training. Being the good soldiers we were, we went straight to a field location and set up a nice headquarters site to include a field shower using a screen latrine for the sides (this leaves the top open). The first sergeant set up a shower schedule that had the males showering during the day and females at night. The second or third night we were there the number of helicopters flying over us after dark was amazing. We needed air traffic control to keep them from hitting each other. The first sergeant didn't get it until I explained a little about night vision devices to him. The next night he changed the schedules and I guess the aviation unit didn't have any female pilots as the amount of air traffic dropped off immediately.