I remember reading a couple of Brian Kakuk's descriptions of his exploration dives, where he does a segment at 150, and then up to about 35 feet, and then back for a long segment at 150 -- not really a very healthy kind of profile, but if it's what the cave does, what can you do?
(Of course, my instructors would have me deco out the deep sections on the ascent to the shallows EACH time.)
(Of course, my instructors would have me deco out the deep sections on the ascent to the shallows EACH time.)