YP-387

YP-389
Sister YP-389, built in the same yard at the same time to the same specs
Type:
shipwreck, patrol boat, U.S. Navy, converted trawler
Built:
1941, Bethlehem Quincy, Quincy MA, USA, as Salem
Specs:
( 102 x 22 ft ) 301 tons, 21 crew
Sunk:
Wednesday May 20, 1942
collision with collier Jason - 6 casualties
Depth:
40 ft

On 10 September 1947, Windlass, in company with Salvager, began searching for the sunken YP-387. She located the wreck and began salvage operations while Salvager returned to Bayonne, apparently to get necessary equipment. Windlass apparently shifted briefly to Norfolk, Va., for the same reason before both heavy lifting salvage vessels returned to the site of the sunken YP off Hereford, N.J., on 1 October 1947. Two days later, they placed demolition charges in the sunken "Yippie boat" and blew her up to prevent her from being a hazard to navigation.

-- exact location unknown

From: the Dictionary of American Naval Fighting Ships

The Navy acquired three of these "Yippie" boats together, identical sisters. They all came to bad ends. The YP-387 was sunk in a collision off Cape May. The YP-389 was sunk by gunfire of the U-701 in 1942, unable to fight back because her one 3" gun was broken. The YP-388 sank in a collision in Boston harbor in 1951 and was not raised for almost a year.

YP-388
YP-388
Identical sister YP-388, raised by the crane-ship Kearsarge, and looking like a prototype for an artificial reef.
YP-389
YP-389 side-scan sonar image in 2009, depth: 300 ft
Navy Yippie boats

These modern Navy "Yippie" (YP) boats are a common summer sight. They are used to train cadets in boat handling and seamanship and are usually found in groups of four or more, executing synchronized maneuvers.

Jason
Jason as USS Jason


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I have found no correlation between good visibility and anything else at all. Calm seas certainly don't hurt, but the worst visibility I have ever been in was with a 1-foot surf on the beach. There is however a very good correlation between bad visibility and storms, which is why a single hurricane can end the season.

Other factors which influence visibility are: algae blooms, spawning seasons of some invertebrates, which can fill the water with tiny swimmers, jellyfish ( yes, so many you can't see through them, luckily they don't sting, ) other divers churning up the bottom, and just plain gunk in the water. I don't know how to predict most of these, except to say that if you dive a lot, sooner or later you will see some good visibility. Sometimes in the ocean, the visibility will be different in different depth layers. I have seen the viz go from 3 ft on the way down the anchor line to 20 ft on the wreck.