What dive conditions might require additional training for divers?

Diving in sites with strong currents and low visibility presents unique challenges that require additional training for divers. These conditions can significantly impact a diver's safety and ability to navigate effectively. Strong currents can lead to increased physical exertion, making it essential for divers to be trained in techniques such as drift diving, managing buoyancy in moving water, and executing a controlled ascent or descent against the current.

Low visibility complicates the diver's ability to see potential hazards, communicate with dive buddies, and orient themselves in the environment. Divers must be trained to rely on their instruments and acknowledge the importance of maintaining proximity to each other. This also necessitates proficiency in hand signals and emergency procedures since traditional visual cues may be limited.

Clear, warm waters present a more typical diving environment and do not generally require additional training beyond basic certification. Shallow, calm lakes and controlled environments likewise offer fewer challenges that would necessitate specialized training, as these settings are typically predictable and manageable. Therefore, divers should focus on enhancing their skills specifically for conditions that pose greater risks, such as those exemplified in the correct answer.