With the help of fins, snorkel and mask this is easier, but when lying on the back, the snorkel will have to be reversed because it will help to keep the occasional wave out of one's mouth.
Ngoncedo lwamaphiko entlanzi umbhobho ekuphefumleka ngawo phantsi kwamanzi kunye nezigqubuthelo zilula xana ulele ngomqolo umbhobho wokuphefumla ngaphantsi kwamanzi kufuneka ujikwe kuba uzakunceda ekugcineni amaza asuke emlonyeni womntu