Post by Deleted on Dec 24, 2016 6:33:42 GMT
duckduckgo.com/?q=%22typhoon+krosa%22+wave&t=ffsb&ia=web
www.glerl.noaa.gov/pubs/fulltext/2008/20080018.pdf
In particular, the buoy located at (121 ◦ 55 0 30 00 E, 24 ◦ 50 0 57 00 N) with 38m water depth near the small Gueishantao Island, 12km offshore of the northeast coast town of Suao, which was located close to the center of Krosa, recorded a very large trough to crest maximum wave height of 32.3m, which could be the highest known H max ever recorded.
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It is by any means a typical data set of wind generated ocean waves, only this one is larger than most ever recorded. Indeed in just that 512s stretch of recording, there occurred one wave height over 30m high, four over 25m, ten waves over 20m, and fourteen of them over 15m in height – a clearly unprecedented recording.
So while the The Idiot Of TSI says a deck on a spar bouy 80m/260ft tall would be hit by a rogue wave, that wave would need to be 160m/525ft tall, and NOAA isn't agreeing with him. He's going to diss NOAA now, i'd lay money on it.
The existence of gigantic maximum wave heights during a hurricane or typhoon in the world oceans is by no means new. Wang et al. (2005) reported a H max of 27.7m derived from a deep-sea pressure gage in the northern Gulf of Mexico during the passage of hurricane Ivan in 2004. Holliday et al. (2006), on the other hand, discovered a recorded H max =29.1m from the Shipborne Wave Recorder onboard RRS Discovery on 8 February 2000 in the northeast Atlantic Ocean 250 km west of Scotland during a developing storm.
(29 meters = 95 feet)
Remember, wave heights are measured trough-to-peak, which are roughly symetrical about mean calm water level. Therefore, if you are considering being around a 100ft wave, it is just about 45ft of trough and 55ft of peak. Put your heave plates and floatation at 300ft deep and the deck at 80ft and you might sleep thru it all. If you think 80ft above mean calm water is terribly high, take a look at deck elevation on any large modern cruise ship, any large military ship, or any cargo ship. I am talking ocean waves here, you need to think of ocean configurations.