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Used Sea

Used Sea

Why is sea level used as a reference point for altitudes?

Why is sea level used as a reference point for altitude (eg, Mt Everest is 9km above sea-level)? Especially since sea level is rising, how can it be a reference point.
Thanks.

The actual reference is Mean Sea Level,or MSL. As stated previously sea level does [...]

June 30th, 2009 | Tags: , , , , , , , , , , , | Category: Scuba & Snorkeling | Leave a comment