The techniques of descent to the bottom and ascent to the surface and the exercises to do during the dive are demonstrated by a Padi Dive Instructor. For it to be effective, the briefing must be both complete and succinct.
It is therefore suggested to spend a few minutes immediately before the dive to explain and summarize (briefing) all the indications concerning the dive site, the dive plan and, if they are accompanied by students in training.
Its total duration should not exceed 5-6 minutes, time beyond which divers, already prepared and willing to start the dive, could become impatient or otherwise not follow the explanations with the necessary attention.
Regarding the contents also the briefing must follow the rules of Interest and Safety. The characteristics of the seabed, its bathymetric profile, the presence of rocks, Best Scuba Mask Strap, algae or sand must therefore be illustrated, without forgetting to mention the possible presence and, in the case, the intensity, of superficial or bottom currents. Indications on visibility and water temperature should also be provided.
You briefly describe the living species that can be encountered, the risks that some of them may entail for the diver e,above all, the risks that an excessively enthusiastic behavior of the diver can cause to the environment.
The dive instructor illustrates the dive plan, starting with defining the time and depth limits valid for all groups. You then move on to the formation of couples to whom it is suggested to check the reciprocal equipment. A quick reminder of the fundamental underwater signals, often learned with slight differences in the different schools, is often useful.
Emphasis should therefore be placed on the procedures to be followed if a diver remains isolated from the rest of the group or on how the group should behave if the carer has to perform an emergency intervention as shown by a Padi Dive Instructor.
Finally, the groups’ order to enter the water is established, taking care to avoid crowding at the entrance or exit from the water, specifying where to go down or up, whether to take off the equipment, in which order to pass it on board, etc. .
For school or exam diving it is advisable to spend a few more minutes remembering the techniques of descent to the bottom (speed, buoyancy control, compensation in the masks and ears) and ascent to the surface (speed, use of the safety decompression stops: how and where to do them). If the dive foresees it, the type of exercises to be performed and the execution time sequence are illustrated.