object is the shape of a ball 300 feet in diameter. (~100m) object weighs 100,000 lbs (~50,000 kg) object is at a depth of 1000 feet (~300m) I just need a rough estimate - you can use meters or feet or whatever, i don't care. salt or fresh water is fine but if there is a choice salt. do I need more information about the object? can it be deduced how buoyant it is by its diameter and weight? I don't have a specific buoyancy in mind so if the diameter is not wide enough to allow the object to be buoyant then you can increase the diameter. Again, I just need a rough estimate, so if you just assume a certain level of buoyancy that is fine. I would appreciate any help on this... I am researching the answer but have no background in physics so I'm going too slow for my liking.