Dive Into Success: Master the SDI Open Water Scuba Diver Exam 2025 – Make Waves with Confidence!

The purpose of a surface marker buoy is to indicate your position to boats and other divers on the surface. When you are underwater, maintaining awareness of your location becomes crucial for safety, especially in busy diving areas. A surface marker buoy serves as a visible signal that can be seen from the surface, alerting boats and other surface water users to your presence below. This significantly reduces the risk of accidents, such as collisions with boats, as it communicates that there are divers below.

Using a surface marker buoy is a common safety practice and is essential for both the diver's safety and the safety of those on the surface. This practice enhances situational awareness and ensures that divers can be adequately monitored while they explore underwater environments. In contrast, the other options do not align with the primary safety function of a surface marker buoy, which is to provide visibility and promote safety for divers in the water.