buoying >> /bɔɪ/
Definition: [verb] Keep (someone or something) afloat.
Example: the creatures could swim, both buoyed up and cooled by the water
Definition: [verb] Mark with a buoy.
Example: the wreck is often buoyed during summer months
Definition: [noun] An anchored float serving as a navigation mark, to show reefs or other hazards, or for mooring.
Example: At Carval Rock we tie off to a mooring buoy bolted into the reef at 15m.