An iceburg
None - I have taught many people to sail over the years who can't swim. If you always wear a bouyancy aid or life jacket you'll be fine. If you do fall in the water, just remember 1) Stay with the boat and 2) the life jacket/bouyancy aid WILL keep you afloat so don't panic!
bouyancy- force of weight of gas fluids.
Bouyancy determines whether an object sinks or floats.
The bouyancy of the vessel keeps it afloat. As long as the force of bouyancy is larger then the mass of the ship it will stay afloat.
Until a pro contributes, I suggest that the purpose of the fluid filling the cavities is to prevent excess positive bouyancy, which would cause the fish to uncontrollably float to the surface. Buy having its natural bouyancy at or near neutral, the fish would then be able to adjust to positive or negative bouyancy with only small effort.j3h.
About the only thing that is the same is that both float. A coracle is round and usually made of inter woven reeds. A raft can be made of almost anything that has bouyancy.
same as archimedes' principle
bouyancy
because is a smart
'Bouyancy' is the ability of something to float.
because boaties can floatie