Thanx UBootman, I like to ask opinion questions, to see how other players play.
Ya never know what ur gonna learn. I do prefer the diagnal pattern myself, cutting across the grid at 45° or around there. I surface to recharge and ventilate the boat, at around 10kts for 4 hours then do a trim dive to 40 meters at 3kts for 8 hours. Check'n the hydrophone every 2 hours and playing the gramophone once in a while and only if everybody cleaned their plates. LOL
As for length of time spent in my assigned grid, I use the SAILOR STEVE rule.