Underwater, the first care that a diver should take before performing any signal, is to check if the dive companion is prepared to receive it, under penalty of the signal does not result.
If necessary, your attention is attracted through a sound signalling device (see Module 3 – Miscellaneous Diving Equipment) or by simply tapping the knife handle on the bottle.
Once the attention of the companion is guaranteed, the appropriate signal should be executed, slowly and with the greatest clarity, for a perfect understanding.
If it is a sign that translates a question, the answer mark must be equally clear, so that it is also well understood.
IDENTIFICATION SITUATION OR STATUS
PRESSURE AND EQUIPMENT
ALL SIGNALS MUST RECEIVE A REPLY, EVEN IF IT IS THE SIMPLE CONFIRMATION THAT THEY HAVE BEEN UNDERSTOOD
In night diving, the same signals are used as during the day, and the diver must focus the light of his lantern on the hand that carries out the signal, so that it is seen by the diving companion. In addition there are two specifically nocturnal signs, which are made exclusively with the flashlight.
It is important that the diver has a sound signaling device (see Module 3 – Miscellaneous Diving Equipment) to alert the companion or vessel.
One of the most widely used systems for communication between a submerged diver and the support vessel, is through a cable, handled according to an internationally defined “pulling code”. As this situation is not part of the performance of the One Star Diver, the description of this system will be made at a higher level of training.
Currently there are electronic means of calling divers to the surface and underwater orientation. The latter allow the diver, based on the indications of an electronic signal detector carrying on the wrist, to go directly to the signal’s issuing source, placed under the vessel or at the dive exit site.
ALL SIGNS MUST BE TRAINED IN THE THEORETICAL CLASS, AND THEN REPRODUCED WITHOUT ANY HESITATION DURING PRACTICAL CLASSES