What is one of the primary components of inflating a dry suit?

The primary component of inflating a dry suit is the suit bottle. A suit bottle is a specialized inflation device that stores air and supplies it to the dry suit. When a diver wants to maintain a suitable level of buoyancy while submerged, they can open a valve to allow pressurized air from the suit bottle to enter the suit. This helps to counteract the effects of buoyancy loss as the diver descends, as well as manage thermal insulation by keeping a layer of air within the suit.

In contrast, while an oral inflator allows divers to blow air into their suits using their breath, it is not as commonly used due to practicality and efficiency concerns. A buoyancy control device (BCD) air supply refers to the system used to manage buoyancy through a BCD, but it does not inflate a dry suit directly. Similarly, a secondary tank usually supports additional breathing gas supply for divers but is not intended for dry suit inflation. Hence, the suit bottle is the most appropriate choice for this function.