No. Afloat is an adjective. It cannot be a preposition.
We won't be afloat for long!
Thunder Afloat was created in 1939.
Afloat was created on 2004-11-22.
The Borrowers Afloat was created in 1959.
it is bla bla afloat
The duration of Thunder Afloat is 1.58 hours.
the structure of the boat allowed it to stay afloat no matter what.
The duration of Alf's Button Afloat is 1.48 hours.
Alf's Button Afloat was created in 1938-07.
When the ship sank I used a lifebelt to help me keep afloat.
The whale merely nudged our little boat and we were suddenly afloat, without a boat.
yes,it can stay afloat as it has a waterproof coverings or fibrous husk to trap air.