The Mudcat Café TM
Thread #30878   Message #399942
Posted By: Amos
16-Feb-01 - 11:38 PM
Thread Name: BS: Karsk fiasco, US-style
Subject: RE: BS: Karsk fiasco, US-style

If you want to get some sense of the amount of forcve and random motion involved in the emergency-blow surfacing event, here's a clip of a different class of sub doing it.

On the morning of April 10, 1963, the USS Thresher proceeded to conduct sea trials about 200 miles off the coast of Cape Cod. At 9:13 a.m., the USS Skylark (a surface vessel assigned to assist Thresher) received a signal, via underwater telephone, indicating that the submarine was experiencing "minor difficulties, have positive up-angle, attempting to blow."

Shortly afterward, the Skylark received a series of garbled, undecipherable message fragments from the Thresher. At 9:18 a.m.,
the Skylark's sonar picked up the sounds of the submarine breaking apart. All 129 hands were lost—112 military and 17
civilian technicians.

The submarine community, the Navy and the nation were stunned. Thresher was the best of the newest. The ship was built at
the Portsmouth Naval Shipyard in Kittery, Maine and was the first of a new class of submarine, designed for optimum
performance of sonar and weapons systems.

USS SCORPION specialized in the development of nuclear submarine
warfare tactics. Varying her role from hunter to hunted, she participated in exercises which ranged along the Atlantic coast and
in the Bermuda and Puerto Rican operating areas; then, from June 1963 to May 1964, she interrupted her operations for an
overhaul in Charleston, South Carolina. Resuming duty off the eastern seaboard in late spring, she again interrupted that duty
from 4 August to 8 October to make a transatlantic patrol. In the spring of 1965, she conducted a similar patrol.

During the late winter and early spring of 1966, and again in the fall, she was deployed for special operations. Following the
completion of those assignments, her commanding officer received the Navy Commendation Medal for outstanding leadership,
foresight, and professional skill. Other SCORPION officers and men were cited for meritorious achievement.

On 1 February 1967, SCORPION entered the Norfolk Naval Shipyard for another extended overhaul. In late October, she
commenced refresher training and weapons system acceptance tests. Following type training out of Norfolk, she got underway
on 15 February 1968 for a Mediterranean deployment. She operated with the 6th Fleet, into May, then headed west. On 21
May, she indicated her position to be about 50 miles south of the Azores. Six days later, she was reported overdue at Norfolk.

A search was initiated; but, on 2 June, SCORPION and all hands were declared, "presumed lost." Her name was struck from
the Navy List on 30 June 1968.

The search continued, however and, at the end of October, the Navy's oceanographic research ship, Mizar, located sections of
SCORPION's hull in more than 10,000 feet of water about 400 miles southwest of the Azores. Subsequently, the Court of
Inquiry was reconvened and other vessels, including the submersible, Trieste, were dispatched to the scene, but, despite the
myriad of data and pictures collected and studied, the cause of the loss remains a mystery.

One hypothesis is that she carried a class of torpedo that had a vulnerability during maintenance of intiating a runaway condition, as though it had been fired, but never left its storage rack.  This can be caused by as simple a mistake as mismanaging cable connections while recharging the torpedo's electric batteries.  In an extreme case of runaway, the doctrinal manuver is turn the boat through a 180º turn; the fail-safe solution built into its targeting circuitry to force an abort of the program. If not aborted the program ends in detonation.  The location at which the vessel was finally located supports the possibility that it turned on such a reversal of course, and the damage is not inconsistant with that manuver failing to have its desired effect of forcing an abort in the middle of a loaded torpedo rack. The reason the Navy failed to locate the vessel was because it assumed an ongoing track from last known location. I believe it was a civilian mathematician who had the genius to replot based on a different assumption (the 180º turn) name an entirely different search zone hundreds of miles back toward the med, and finally locate the vessel.

SCORPION is in two major sections. The forward hull section including the torpedo room and most of the operations
compartment is located in a trench that was formed by the impact of the hull section with the bottom. The sail is detached. The
aft hull section including the reactor compartment and engine room is located in a separate trench that was formed by the
impact of the hull section with the bottom. The aft section of the engine room is inserted forward into a larger diameter hull
section in a manner similar to a telescope.

Regards,

Amos