SDI Open Water Scuba Diver Practice Exam 2026 - Free Scuba Diver Practice Questions and Study Guide

Getting adequate rest before a diving trip is essential for preventing seasickness because it helps maintain overall physical and mental well-being. When a person is well-rested, their body is better equipped to handle the physical stresses of being on a boat, including the motion of the water. Fatigue can heighten susceptibility to seasickness due to increased stress and lower overall resilience.

Having energy and a clear mind allows for better coping mechanisms when faced with the swaying and rolling of a boat. When you're well-rested, your body is more likely to adapt to the motions, reducing the likelihood of discomfort that leads to seasickness.

In contrast, other choices may not contribute positively to preventing seasickness. Deep breathing can help in managing nausea once it begins but does not necessarily preemptively prevent it. Avoiding water is not advisable, as staying hydrated is important for overall health, especially in a marine environment. Lastly, eating a heavy meal can actually increase the risk of seasickness, as a full stomach can exacerbate feelings of nausea when combined with the motion of the boat. Therefore, ensuring adequate rest before the trip is a proactive approach to mitigating the risk of seasickness.