a cave diver explores a submerged cave system aware of the limited air supply and the dangers of getting lost in the darkness

cave diver explore submerge system aware limit air supply danger hazardous unknown diving underground seclude hide marine underworld condition creature submersion terrain scuba mysterious aquatic headlamp spelunk mission life passage labyrinth underwater device discovery courageous rescue clear seeker mystical challenge endeavor navigation sonar adventure water subterranean pressure darkness equipment cavern