The average height of the surface of the sea for all stages of the tide, used as a reference for elevations. Also called sea level datum
Defining the Language of Aviation
The average height of the surface of the sea for all stages of the tide, used as a reference for elevations. Also called sea level datum
This site uses Akismet to reduce spam. Learn how your comment data is processed.
© Copyright 2017 All Rights Reserved
Speak Your Mind
You must be logged in to post a comment.