Which of the following is NOT part of the eight minimum equipment for SCUBA?

The correct answer is underwater flashlight, as it is not considered one of the eight minimum pieces of equipment required for SCUBA diving. The eight minimum equipment requirements typically include essential items that ensure safety and performance underwater. These items usually consist of crucial gear that aids in monitoring diving conditions, navigation, and emergency situations.

A dive knife, for instance, is vital for safety, allowing divers to cut themselves free from entanglements. A submersible wrist watch is essential for tracking dive time, which helps prevent decompression sickness by monitoring how long a diver has been underwater. Similarly, a depth gauge is critical for measuring current depth, ensuring that divers stay within safe limits and manage their ascent and descent properly.

While an underwater flashlight can be beneficial, especially for exploring dark environments or during night dives, it is not considered a fundamental requirement for safe diving. Instead, it is an accessory that enhances a diver's experience but is not essential for every dive. Thus, it does not belong to the core eight pieces of essential SCUBA equipment.