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Name: Larry S.
Status: Student
Grade: N/A
Location: N/A 
Country: Australia
Date: August 2006


Question:
When scuba diving, will my neutrally buoyant position 10 metres below the surface remain the same relative to the sea floor, or the sea surface as the moon causes the tide to go up and down?



Replies:
Larry,

Since your buoyant position is determined by the density of the water, that position remains the same relative to the surface of the water, not relative to the sea bottom, since density increases with depth (with distance from the surface).

David R. Cook
Climate Research Section
Environmental Science Division



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