A section on multicylinder dives has been added.
Just to warm LongJohnSilver's heart, a short section on pSCR has been added.
Please feel free to add to the pSCR section, LongJohn.
Replaced the sidemount figure with obsolete mean depth line.
Fixes#827Fixes#828
Signed-off-by: willem ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
