Indeed unusual is to pass an airport track by foot. It’s very easy here in Nouadhibou. Just go to the Numerowat district and in direction of the ocean pass the fence without the guard sees you and you’re there. If someone asks what is your business there just say you’re heading Cap Cabano and you had no idea how to reach it. Of course this tip is under Dangerous Places cos it is in fact and everyone knows it already. Just to reminde a nice way to get to Cabano Bay! 
they should change it