Besides all this, because light may be reduced and people may lose their sense of direction while diving, a compass, pressure gauge, depth gauge and flashlight are all essential accessories.
除此之外，由於人潛到深海時，常不知不覺失去上下左右的方向感，光線也會遞減，因此指北針、氣壓表、深度表、手電筒等都是必要配備。