(klÅt) n. 1. A thick, viscous, or coagulated mass or lump, as of blood. 2. A clump, mass, or lump, as of clay. 3. A compact group: a clot of trucks blocking the tunnel's entrance.
Bodies start to float once the gas from decomposition replaced the  water inside the lungs. It is effected by the depth and temperature  or the water. In warm water it can bâ¦e as soon as 1 to 2 days in 80  degree water, or as much as 14 to 20 days in freezing cold water.
However if the drowning person is an athlete, swimmer or has developed larger that average lungs then it will take longer. The women's world record holder for free diving can hold her breath for six minutes without passing out. It takes 20 sec. for a person to drown. Depending on what kind of victim you are. It takes 20 to 60 sec. for a active victim to become submerged. Hear are the kinds of victims and their breathing arm and leg action, body position, and locomotion.