From: Bob Goethe
Sent: November 12, 2017 6:00 PM
To: 'Bill and Carly';
Subject: NASA: Dip on a shoreline with surf
Wow, Bill, this is some photo.
Actually, in this situation where it appears you are looking UP at the wave tops, I think you might need to get up on a platform or cliff in order to see the actual horizon.
This photo demonstrates pretty clearly that the waves do get taller as the sea floor gets shallower. You are going to need to be high enough to be able to see OVER these wave tops to the horizon beyond.
To really get an accurate feel for the height of the platform/cliff/whatever, one would need to take a number of sights – recording the time of each so that the tide can be determined – and keep at it until you get a grouping, and then work backwards to the kind of dip correction you should be making.
"The only noble thing a man can do with
money is to build a schooner."
Robert Louis Stevenson, 1889
This message was sent using recycled electrons.