4 dives, 4 cylinders etc as dmoore19, total bottom time for first 4 dives was 4hrs and 3 mins.
My instructor believed in actually mixing business with pleasure, so after the skills we went for a dive.
My experience was similar -The resort I did my OW at diddn't have a pool to use so for the "pool" sessions we walked 50m down the beach from the dive shop into the shallow "end" of the lagoon which was 1.5m deep flat sandy bottom When practicing the "deep" bit of the pool session we moved out 50m and there was a good sized raft in 3.0m of water.
For my OW four dives we went to a different dive site each time and we rolled off the boat into 6.0-8.0m of water then did the skills required . Once the skills were completed it would be basicly a pleasure dive down to 12-18m for a total dive time of around 40 minutes per dive.