Just because it is easier. It's hard to stand up in fins (FLIPPERS) on a rocking boat!!
In the Water....
swallow water
water proof ones
They do not dive deep enough.
People are dumping trash in water.
Generally no. They need to be quite fit to be able to swim in the water :)
Open Water
Divers fall backwards from a boat because it is often the easiest way to make a deep water entry from a small boat or rib.
Most scuba divers just obtain open water certifications from recreational diver training agencies, such as PADI, NAUI, BSAC or SDI.Only military or commercial divers undertake vocational diving qualifications.
I would call it the Great White Pucker Factor.
The deeper the diver goes, the higher the pressure is.
Lightning can be harmful to scuba divers because it can strike the water's surface and potentially electrocute anyone in the vicinity. Thunder, on the other hand, is not harmful to scuba divers but can indicate the presence of a thunderstorm, which can lead to dangerous conditions such as strong currents and rough seas. It is generally advised for divers to avoid entering the water during a thunderstorm or if lightning is present.