Underwater diving procedures

underwater diving where the diver breathes from apparatus (scuba) which is completely independent of surface supply

technique for equalising pressure in the middle ears

photography done underwater

Piloting or pilotage is the process of navigating on water or in the air using fixed points of reference on the sea or on land, usually with reference to a nautical chart or aeronautical chart to obtain a fix of the position of the vessel or aircraft with respect to a desired course or location. Horizontal fixes of position from known reference points may be obtained by sight or by radar. Vertical position may be obtained by depth sounder to determine depth of the water body below a vessel or by altimeter to determine an aircraft's altitude, from which its distance above the ground can be dedu

methods used by underwater divers to communicate

diving inside a protective cage to observe sharks in the wild

underwater diving during the hours of darkness

recreational diving philosophy

underwater diving to a depth beyond the norm accepted by the associated community

capturing video images underwater

underwater diving at altitudes above 300m

technique to equalise pressure in the middle ears

equalising of pressure in middle ears

diving using an equipment configuration where the scuba sets are clipped to the sides of the harness