On the Bottom: The Raising of the Submarine S-51 by Edward Ellsberg

By Edward Ellsberg

On September 25, 1925, the S-51 tragically sank to the sea flooring, and Edward Ellsberg was once the guy whose braveness and resolution introduced it back

The sinking of the submarine S-51 was once one of many maximum tragedies in American naval background. because of a miscommunication and next collision among the sub and a passing steamship on a September evening, the S-51, together with thirty-three of its workforce of thirty-six, sank to the sea depths. The tragedy of the S-51 captivated the state, and was once a fixture within the pages of yank newspapers. the tale took on an entire new size whilst the army made up our minds to take over the salvage of the thousand-ton behemoth from a civilian company.
Heading the group tasked with this most unlikely feat was once Edward Ellsberg, on the time a lieutenant commander. On the Bottom is Ellsberg’s account of the successes and screw ups he and his males skilled as they tried an striking feat of engineering and bravado: the 1st salvage of a submarine from the open ocean.

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Apcn. 2). 3. thod O: aamage cu blast-damage prediction to forested areas. 3). 4. tee! 4). An additional objective was added during Castle to provide for Lie doclumcnt~tion of damage inflicted upon rniscellanecus structures from the unexpectedly high yield -f WC! 5). 5, which cunsi steal of documentation of unexpected damage to structures from Shot 1. 1 ). b mounts to obtain more corner and edgo ioa[iin$; detail, and to make limited use of displacement gages. A change in detonation sites made it necessary to abandon this plan, and adopt instead a different approach (see ,>ppendix).

Recorders were plaoed at some island stations to provide 4. Garnma-exposure-rate rate of arrival, peak actlviw, and decay of fkhut. data on the time of arrtval, fallout collectors were used to collect samples during 5- to 30-minute 5. Incremental intervals and to provide data on time and rate of arrival of fallout. 6. After Shot8 5 and 6, surface and aerial sarveys of the oaeaa fahut area were performed to measure the activtty in the surface hyer of the eoeaa ad its depth of penetration. The existence of a mixed layer in the ocean down to the timrrnooline, with little mixing below, enabled these measurements to be related to tha total aotivity deposited.

The results of these experiments indicated that [1! e feeding mechanism of the crganism affected the amount of activi~ assimilated, ‘2) ‘he solid ph~es were concentrated in preference to non-particulate matter, and (3) there was no evidence of fractionation of isotopes in the assimilated material. -effect program consisted of five projects under the categcriesof structure’:, crater survey, tree-stand stlwiies, ‘and minefield clearance. ’s of Program J were to: 1. CA,tain further -k&. on structural loading under air.

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