I was lucky in a way, Dr Tracy, because both the ones I did during the Advanced Open Water and Deep Diver were in poor visibility in unfamiliar waters so I really had to make sure I stayed on course. I couldn't help grinning when I ended up near the instructor because I knew then that I had done it right. For the quick one at the surface during the Open Water course, it was a good thing I didn't follow my buddy and stuck to what I thought was right because I ended up at the boat whilst the instructor had to go retrieve him about 20 metres away and in another direction. 
