What minimum components must a decompression regulator have?

The minimum components required for a decompression regulator include a first stage, second stage, short high-pressure hose, and a submersible pressure gauge.

The first stage is crucial as it reduces the high pressure from the tank to an intermediate pressure, making it manageable for breathing. The second stage delivers the breathable gas to the diver on demand. The short high-pressure hose is necessary for connecting the first stage to the pressure gauge, which provides real-time data about the remaining tank pressure. The submersible pressure gauge is vital for monitoring how much air is left, ensuring that a diver can manage their air supply throughout the dive and during the ascent.

Having all these components ensures safety and proper monitoring of the diver's breathing gas supply, especially in decompression diving, where accurate knowledge of gas amounts at varying depths is critical for avoiding decompression sickness and ensuring an effective ascent.