Why might additional thermal protection be necessary when diving with Nitrox?

When diving with Nitrox, additional thermal protection may be necessary primarily due to the potentially longer dive times involved. Nitrox, being a mix of nitrogen and oxygen, can allow divers to extend their bottom time in certain depth ranges compared to air, given its lower nitrogen content. This extended time underwater can result in increased exposure to the cold water environment, which can lead to a higher risk of hypothermia.

Consequently, divers should ensure they are adequately insulated to maintain body warmth during these longer dives. Proper thermal protection is essential for maintaining comfort and safety, as prolonged exposure to cold water can adversely affect a diver's performance and enjoyment of the dive. Thus, equipping oneself with the appropriate thermal gear is a critical consideration for safety during extended Nitrox dives.