Many moons ago when 18 Sqn flew proper helicopters the then Boss ( White Tornado) decided that the whole squadron would return to Big G at night with no lights. A night stream navex was worked out with a/c leaving from their flight hides at 5 min intervals about 16 helicopters in total.
This seemed a fine idea
All went well and I didn't see another helicopter until I arrived at Big G - the scary bit was although we left the exercise area in the order Pegasus 1-16 we didn't arrive at Big G in that order
HF