High Quality Content by WIKIPEDIA articles! Diving Signals are a form of sign system used by SCUBA divers to communicate when underwater. Some diving equipment such as full face diving masks and diving helmets include voice communication equipment but most divers in recreational diving do not possess expensive equipment like that and must use Diving Signals.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.