Another small study looked at seafarers working on merchant container ships and found that respiratory disturbances such as snoring were more common when the seafarers were sleeping on their backs.

另一项小规模研究观察了在商船集装箱船上工作的海员，发现当海员仰卧睡觉时，呼吸紊乱，如打鼾，更为常见。