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als vervolg op het artikel in Green Mountain Outlook :)

Submarine SS-291 Crevalle War Patrol
SS-291_CREVALLE_Part1.pdf
SS-291_CREVALLE_Part2.pdf


The Seventh War Patrol in the Sea of Japan 27 May - 5 July 1945
was to become one of the most legendary United States Submarine Service combined operations of W.W.II. It was the brainchild of Vice Admiral Charles Lockwood Commander Submarines Pacific (COMSUBPAC)  and with the support of Fleet Admiral Chester W. Nimitz . They had put together a daring plan to covertly enter the Inland Sea of Japan with a large group of submarines. The entrances to this sea were most difficult, and practically impenetrable, as there was only very narrow straits to pass through. In addition the Japanese had erected submarine nets and had saturated the entrances with anti-submarine mines. Only one other Submarine had accomplished a successful penetration of this area.

They came up with a listening device that would ring if an underwater anti submarine mines were close by the hull. This is the Frequency Modulated Sonar (FMS) System that the CREVALLE and her sister subs had recently been fitted with. It was accurately used to chart the various mines around the Tsushima Straits...

Thanks to Issue & Nav Materials :)