Final answer:
Commercial SCUBA setups often include communication systems for divers to interact with each other and the surface team. Divers must also be aware of dive safety topics such as buoyancy, pressure equalization, and decompression sickness prevention. The compressibility of gases and procedures for safe ascent are other important safety considerations in SCUBA diving.
Step-by-step explanation:
The question "Are there any comms in a Commercial SCUBA setup?" refers to whether commercial SCUBA (Self Contained Underwater Breathing Apparatus) diving equipment includes a communication system. In many commercial SCUBA setups, divers do use communication devices to speak with each other or with the support team on the surface. These devices utilize through-water acoustic signals or hard-wired communications.
It is important for divers to be aware of various factors such as buoyancy, pressure equalization, and the amount of time spent underwater. Knowledge about the compressibility of gases used in SCUBA is crucial. This is because the pressure at depth greatly exceeds surface pressure, and the behavior of gases under increased pressure is a critical aspect of dive safety. For example, as divers ascend, ambient pressure decreases, and gases become less soluble, potentially leading to decompression sickness (DCS) if the ascent is too rapid.
To avoid DCS, divers must perform slow ascents or take decompression stops. In some instances, when prevention fails, divers are treated with hyperbaric oxygen therapy in special chambers. These are crucial considerations in SCUBA diving that ensure safety and effective communication underwater.