FBuoyancyMultBody
All of the FBuoyancy settings control the buoyancy (how fast or slow an object will sink when dropped in a pool of water) of some type of material in the game. A setting of -1.000 means the material will sink immediately to the bottom of the water. A setting of 0.000 means the material will slowly settle into a mid-level height in the water. A setting of +1.000 means the material will float on top of the water. Other values control the speed at which the material will sink and the height at which it floats.
FBuoyancyMultBody is a function that will control the buoyancy of player and NPC bodies (live or dead). For realism, set this value a few points (about 0.3 is a good difference) higher than FBuoyancyMultExtremity so that hands and feet dangle below the torso.