This link shows how the officers of the Ramapo triangulated the wave height. Their report is, AFAIK, the first 100% credible and documented scientific observation of extremely large waves:
http://hyperphysics.phy-astr.gsu.edu/hbase/watwav.html
Alas dinodino without a satisfactory theory to explain it from trough to trough, the phenomenon, no matter how well documented doesn’t really exist ~ does it!