What should divers do to minimize the impact of drag from their BCDs?

To minimize the impact of drag from buoyancy control devices (BCDs), divers should focus on streamlining their body position. When a diver maintains a streamlined posture in the water, they reduce the surface area exposed to the flow of water, which in turn decreases resistance or drag. This position is crucial for efficient movement and conserving energy during dives.

Streamlined body positioning typically involves keeping the head, torso, and legs aligned while minimizing excessive movements or unnecessary gear that could increase drag. By adopting this posture, divers can move more effectively through the water, maintain better control, and ultimately enhance their diving experience.

Other methods like using heavier materials, increasing speed, or wearing tighter wetsuits may not be effective strategies for reducing drag. Heavier materials can add weight without improving hydrodynamics, increasing speed can lead to more drag due to turbulence, and tighter wetsuits may not significantly affect the overall drag created by the BCD.