{"product_id":"9781608881680","title":"Why the USS Thresher (SSN 593) Was Lost","description":"\u003cp\u003eThe US nuclear submarine THRESHER was lost because standard compensation procedures to adjust for hull compression during the deep-dive on 10 April 1963 were not followed. Consequently, THRESHER was heavy (negatively buoyant) at test-depth (1300 feet) and unable to deballast because adiabatic cooling froze moisture in the air-lines to the ballast tanks, blocking those lines.\u003c\/p\u003e\u003cp\u003eOperation of the Reactor (Main) Coolant Pumps in FAST (2-pole mode) may have contributed to a reactor scram (shut-down) and loss of propulsion at 0909.0R (local time). THRESHER sank at an average rate of 120ft\/min from test-depth (1300-feet) at 0909.0R to collapse at 09:18:24R at a depth of 2400-feet (1070 psi) in 1\/20th of a second, too fast to be cognitively recognized by those aboard who - although they knew collapse was imminent - never knew it was occurring.\u003c\/p\u003e\u003cp\u003eThe Navy Court of Inquiry (COl) dismissed the results of their own test which established conclusively that flooding at test-depth - the COI's assessed cause of the disaster - would have been a catastrophic\u003c\/p\u003e\u003cp\u003eevent and would not have been reported by THRESHER to her escort ship, the USS SKYLARK (ASR 20), at 0913R as \"experiencing minor difficulties.\" Multiple lines of evidence - discussed in detail by Chapter\u003c\/p\u003e\u003cp\u003e1 of this assessment - confirm there was no flooding prior to collapse of the pressure-hull at great depth.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"W. Frederick Zimmerman","offers":[{"title":"Default Title","offer_id":47037422764272,"sku":"9781608881680","price":24.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9781608881680_p0.jpg?v=1763837820","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9781608881680","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}