SDI Open Water Scuba Diver Practice Exam 2025 – Complete Test Prep

To minimize the risk of barotrauma, divers should always equalize their ears on descent and ascent. Barotrauma occurs when there is a difference in pressure between the inner ear and the surrounding water, which can lead to discomfort or injury. Equalizing the ears helps to equalize the pressure inside the ear with the external pressure, preventing pain and damage to the ear structures.

During descent, the water pressure increases, and divers must actively equalize their ears to maintain comfort and safety. Techniques such as the Valsalva maneuver or the Toynbee maneuver can be used to allow the air in the middle ear to adjust to the surrounding pressure. Similarly, on ascent, it is equally important to equalize, especially if the diver is ascending rapidly. By consistently equalizing as necessary, divers can greatly reduce their risk of experiencing barotrauma.

While swimming slowly during descent can help manage pressure changes, it does not directly address the need for ear equalization. Using a dive flag is crucial for safety and communication during a dive, and limiting the number of dives may help reduce fatigue, but these practices do not specifically target the prevention of barotrauma. Therefore, equalizing the ears is the most effective way to protect against this specific risk