This is considered important both for managing the diving work, and as a safety measure for monitoring the condition of padi hand signals pdf diver. The traditional method of communication was by line signals, but this has been superseded by voice communication, and line signals are now used in emergencies when voice communications have failed.
This can also be used to transmit hand signals to the surface if voice communications fails. Hand signals are generally used when visibility allows, and there are a range of commonly used signals, with some variations. These signals are often also used by professional divers to communicate with other divers. There are also a range of other special purpose non-verbal signals, mostly used for safety and emergency communications. There are two aspects to diver communications: Divers who are diving together as a team need to communicate for safety and efficient completion of the task, and divers who are diving with a surface support team need to communicate with the surface team, also for safety and efficiency.
Communication is most critical in an emergency, where high stress levels make effective communication more difficult, and the circumstances of the emergency may make the communication physically more difficult. Voice communication is natural and effective where it is practicable, and most people rely on it for fast and accurate communication in most circumstances. The general requirements for an effective system for diver communication is that all the people who will use it have access to the system, that it functions effectively in the specific environment, and that the people who wish to use it are familiar enough with it to communicate quickly, accurately and unambiguously with each other, and that the system has sufficient range to work when needed. A simple, logical and widely standardised system of signals will be more effective. Several such systems have been developed using different equipment and suited for different circumstances. These include, sound-based systems, visual systems and tactile systems.