When serving as Chief Engineer of the USS Miller (FF-1091), we crossed from Norfolk to Portsmouth, England in January 1977. Made fuel stops in Bermuda and the Azores.
Heading from the Azores to the English Channel, we encountered the effects of a huge, deep winter low that was sitting stationary about 700nm west of the Bay of Biscay. Winds were SW at 80-90kts, with higher gusts, for several days as we worked our way NE. We were doing 18-20 knots, so the relative winds were still 60-70 knots on the port quarter.
Seas were on the port quarter, running 35-45 feet, with higher ones every once in a while. We turned the forward 5-inch gun house to face aft to reduce mount damage. Took some seas directly into the bridge and some over the signal bridge. When the spacing between seas would vary, the bow would simply fall into a huge hole, or bury into the next swell.
The support structure tubes for the Miser tower cracked at the deck welds. The aluminum superstructure, which had a complete rubber-gasketed expansion seam, cracked from the 01-deck up to the top and all the way across - we had water coming in to sonar control and the ship's library.
We took the drastic step of putting seawater ballast into fuel storage tanks as we transferred fuel to service tanks. Couldn't deballast until well in to the English Channel as the storm seas were running right up there.
When we (finally) got to Portsmouth, we had to offload four men who had broken bones from falls. Most were while transiting the passageways with both hands engaged, i.e. failing to follow the seaman's adage "One hand for the ship and one hand for yourself".
Same ship, two months later, in the Norwegian Sea between the Shetlands and the Faroes, we found ourselves (and the other five ships in the Standing Naval Force Atlantic) facing another winter storm. This time we basically "hove to" for over a day. That means we put on turns for 6-8 knots, put the seas just off the bow, and held position.
Some other "high seas" events in Mistrals, etc, but that's what happens when you spend 28 years in the Navy, with 21 on surface ships and 18 crossings of the Atlantic.
Go here to look at some real storm conditions:
http://tv-antenna.com/heavy-seas/
Be sure to go to the bottom and check photos on other pages.
Brian
Commander, U.S. Navy (Ret)
Merchant Marine Master, Oceans, Steam, Motor, or Sail - 1600-Tons
Chief Mate, Oceans, Unlimited Tonnage