It worries me a bit that you only just learnt about this as a divemaster . This should be part of the curriculum pretty early on . <| sep |> thank you , and ditto . happy thanksgiving . 3 <| sep |> Haha I ' ve visited the sub before . That ' s a lie . <| sep |> Where ' s this from ? One of the popups ? <| sep |> When you don ' t have a map , the best thing you can do is pick a direction and follow some set of rules that minimize the time spent walking over the same paths . Unless you can see the exit from the entrance , you simply don ' t have enough data for anything other than going down every fucking route . Of course , as soon as you start walking in a direction , you now have some data the I haven ' t found an exit over there data , so you can begin to optimize , which is what useful algorithms are all about .