Driven by a cavernous ambiance, you could describe the feel of the piece, at the very best, as "moody". The percussive opening repeats its motif endlessly, but with a time signature of 10/8 and its focus on fives, the accents appear to be floating more than they really are (to a western ear).
Vocoded drones float in and out of the rhythm along with bell-like sounds and percussive water sounds to give the impression of an endless, floating ride in the darkness, to be perturbed by a heavy ride in the middle, courtesy of that-which-cannot-be-named.