SDI Open Water Scuba Diver Practice Exam

The correct answer reflects the variety of weight systems that divers can utilize to achieve proper buoyancy control underwater. Each system serves a specific purpose and can be advantageous depending on the diver's preferences and diving conditions.

Weight belts are a traditional and widely used method that allows divers to easily adjust their buoyancy by adding or removing weights. They are simple to use and can be quickly detached in case of an emergency.

Integrated weight systems, found in buoyancy control devices (BCs), provide a more streamlined approach. Weights are securely stored in specialized pockets, which enhances comfort and eliminates the bulkiness of a weight belt. This integration allows for better weight distribution and less likelihood of the weights shifting during the dive.

Cylinders with permanently affixed weights on the boot represent another innovation designed to help stabilize divers in the water, particularly for certain types of diving such as diving with specific tank configurations.

By incorporating all these options, divers can choose the most suitable system based on their specific needs, preferences, and diving environments. This capability to select from multiple weight systems is crucial to achieving the proper buoyancy and safety while diving, making 'All of the above' the comprehensive answer to the question.