List the methods of communication while night diving.
Rapping on your tank, waving your light or moving your light in a predetermined pattern, gently touch your buddy, shining your light on hand signals at waist level, using a slate, and by using a whistle on the surface.
Briefly describe the navigational techniques used to avoid disorientation and loss of direction while night diving.
Dive site during the day. Before descent, take a compass heading to shore or back to boat. Keep navigation patterns simple. Don’t stray far from entry/exit and reference line.