1 atmosphere (ata) is equal to how many feet of seawater (fsw)?

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Multiple Choice

1 atmosphere (ata) is equal to how many feet of seawater (fsw)?

Explanation:
Pressure in diving contexts rises roughly one atmosphere for every 33 feet of seawater. At the surface you’re at about 1 ATA, and going down about 33 feet adds another atmosphere, giving roughly 2 ATA at that depth. So the depth that corresponds to one atmosphere of pressure (beyond the surface baseline) is about 33 fsw. That’s why the standard conversion used is 1 ATA ≈ 33 fsw. This helps divers translate depth into absolute pressure for gas planning and decompression considerations. Compare with other depths: 66 fsw is around 2 ATA, 44 fsw about 1.33 ATA, and 10 fsw about 0.3 ATA.

Pressure in diving contexts rises roughly one atmosphere for every 33 feet of seawater. At the surface you’re at about 1 ATA, and going down about 33 feet adds another atmosphere, giving roughly 2 ATA at that depth. So the depth that corresponds to one atmosphere of pressure (beyond the surface baseline) is about 33 fsw. That’s why the standard conversion used is 1 ATA ≈ 33 fsw. This helps divers translate depth into absolute pressure for gas planning and decompression considerations. Compare with other depths: 66 fsw is around 2 ATA, 44 fsw about 1.33 ATA, and 10 fsw about 0.3 ATA.

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