Returns true when object is in diver state i.e. when unit would put diving goggles on.
Diving goggles remove blurriness underwater, however when assigned, they do not appear on the face of the unit until the unit steps into the water. This command allows to detect the moment when the goggles are visible. If the unit doesn't have diving goggles assigned, this command would still return true at appropriate time if the unit steps into the water.