Deep dives can be described as __________ and __________.

Deep dives can be described as colder and longer due to several factors related to thermal dynamics and the nature of water environments. At greater depths, water temperature generally decreases. This phenomenon is primarily caused by the stratification of water layers, where the upper layers warm up due to solar heating while deeper layers remain cooler. Therefore, divers need to be aware of the cold water temperature as it can significantly impact comfort and safety, necessitating appropriate thermal protection such as a dry suit.

Moreover, deep dives are often longer in duration due to the specific training and techniques divers must utilize to manage the complexities associated with depth, such as gas consumption, pressure dynamics, and safety considerations like decompression stops. Divers usually plan for extended bottom times to explore or accomplish tasks at depth; thus, understanding both the thermal and temporal aspects of deep diving becomes crucial for effective planning and execution.

In contrast, while other descriptions hint at various conditions divers might encounter, these do not accurately correlate with the established characteristics of deep diving.