What moving sand is in the marine environment and how the diver deals with it safely.
The sandy seabed is not fixed. Currents move the sand and create unexpected situations.
Kicking the fins close to a sandy bottom stirs a sand cloud that hides everything. Move forward and wait until it settles.
Some sandy-bottom areas are sloped and moving and may carry the diver to a greater depth than planned.
A sandy bottom is beautiful, but it requires greater control of fin movement.