If a diver's symptoms worsen and require more than 60 feet, what is the appropriate treatment table to use?

In cases where a diver's symptoms worsen and require treatment at depths exceeding 60 feet, the appropriate choice is to use the treatment table specifically designed for such scenarios. Treatment Table 4 (TT-4) is designed for cases involving acute decompression sickness or other dive-related issues that necessitate a recompression protocol at greater depths.

TT-4 is particularly effective in addressing symptoms that may emerge in the immediate aftermath of a dive, as it allows for a gradual recompression process. This table utilizes a depth that optimally balances the need for effective management of symptoms while ensuring the safety of the diver during treatment.

It's important to recognize how the other treatment tables designed for either shallower depths or different conditions are not suitable in this situation. For instance, TT-5 is often used for managing mild to moderate symptoms but does not extend the depth needed for severe cases. TT-6 and TT-7 cater to distinct scenarios and diver conditions that are not aligned with emergencies requiring treatment at or beyond 60 feet, making TT-4 the most appropriate choice for such critical situations.