USS Burrfish
USS "Burrfish" (SS/SSR-312) was a of the United States Navy named for the burrfish ("Chilomycterus schoepfi"), a swellfish of the Atlantic coast. The vessel entered service in 1943 and saw action during World War II and in the postwar era. In 1961 "Burrfish" was loaned to the Royal Canadian Navy where she served as HMCS "Grilse" (SS 71) and was used primarily as a training boat from 1961 until 1969. Construction and career. "Burrfish" was launched on 18 June 1943 by Portsmouth Navy Yard in Kittery, Maine, sponsored by Miss Jane Elizabeth Davis, daughter of Senator James  J. Davis from Pennsylvania. The boat was commissioned 14 September 1943, Commander William Beckwith Perkins, Jr. in command. "Burrfish"s war operations extended from 2 February 1944 to 13 May 1945 during which period she completed six war patrols, sinking one 5,894-ton German tanker "Rossbach" in Japanese waters on 7 May 1944 and, along with , a 200-ton patrol boat on 17 November 1944. Her operating area extended from the Western Caroline Islands to Formosa and the waters south of Japan. During her third war patrol the ship accomplished several special missions, conducting reconnaissance of the beaches of Palau and  Yap where landings were planned. On 20 December 1944, prior to her fifth war patrol, Lieutenant Commander M. H. Lytle relieved Commander W. B. Perkins, Jr. as commanding officer of "Burrfish". "Burrfish" arrived at Pearl Harbor from her last war patrol 13 May 1945. On 16 May she was ordered to return to the United States for major overhaul and arrived at Portsmouth Navy Yard on 19 June. On 12 October 1945 she reported to New London, Connecticut, for inactivation and was placed out of commission in reserve on 10 October 1946. On 2 November 1948 "Burrfish" was recommissioned and  assigned to Portsmouth Naval Shipyard for conversion to a radar picket submarine. Her designation was changed to SSR-312 on 27 January 1949 and her conversion was completed in November 1949. "Burrfish" returned to duty with the active fleet 7 February 1950 and was assigned to Submarine Squadron 6 at Norfolk. Between February 1950 and June 1956 she completed three tours with the 6th Fleet in the Mediterranean Sea; participated in several major type and inter-type exercises; and operated along the eastern seaboard as a radar picket ship. On 5 June 1956 "Burrfish" sailed from Norfolk, Virginia to New London  where she reported for inactivation. She was placed out of commission in reserve 17 December 1956 and laid up in the Atlantic Reserve Fleet. Service with the Royal Canadian Navy. The Royal Canadian Navy was interested in reestablishing its submarine service in the late 1950s and as an essential stopgap to further purchases, they sought a boat to train in. The United States Navy gave them a choice from among ten boats in the Reserve Fleet and "Burrfish" was selected. An official agreement to loan a submarine to the Royal Canadian Navy was finalized after approval by the Canadian Cabinet  and ratification by the United States Congress in May 1960. The loan agreement would last for five years and would include $1,764,000 for the cost of reactivation and modification. In Fall 1960 the prospective crew was sent to New London, Connecticut for US submarine training. On 17 January 1961 the submarine was recommissioned into the United States Navy as SS-312. The sub was then decommissioned from the United States Navy on 11 May 1961 and recommissioned into the Royal Canadian Navy at New London as HMCS "Grilse" (SS 71), the second vessel to bear the name. "Grilse" underwent one  month of sea trials before transiting to her new homeport at Esquimalt, British Columbia, arriving on 14 July 1961. Having reestablished the Canadian submarine service, "Grilse" was acquired by the Royal Canadian Navy for use as a training vessel for anti-submarine warfare training on the Pacific coast. However, the boat lacked the speed of more modern subs and her sensor and weapons outfit were not up to the task of anti-submarine warfare. As a result, "Grilse" spent most of her time as "clockwork mice" for surface ships and aircraft, as a passive target for their training. The submarine  participated in joint Royal Canadian Navy/Royal Canadian Air Force and joint US/Canada training exercises in the Pacific. In May 1966, her five-year loan was renewed for $1 million, and the sub underwent a refit in 1967 for $1.2 million. In Spring 1968, "Grilse" was sent on a training cruise to Japan. Once there, the boat trained with units of the Japanese Maritime Self-Defense Force and the United States Navy. In 1968, the Canadian Navy, now called Maritime Command, was offered a more modern by the US. Maritime Command chose to accept the offer and  was purchased as a direct replacement for "Grilse" on the west coast. With the arrival of "Rainbow", "Grilse" never sailed again. Some of "Grilse"s more modern gear was taken out and transferred to "Rainbow", however "Grilse" had to remain operationally capable in accordance with the loan agreement and the transfer was limited. The sub returned to the US in September 1969. The boat was struck from the Naval Register on 19 July 1969. "Grilse" was officially paid off from Maritime Command on 2 October 1969 and returned to the US Navy the same day. "Burrfish" was sunk as a target  off San Clemente Island, California, on 19 November 1969. Research. "Grilse" was also used as a test platform for measuring the nature of turbulence, the results of which were analyzed by scientists that included French polymath Benoit Mandelbrot, whose thinking on fractals was substantially shaped by this experience: "On a visit to Vancouver, I asked to listen to the recordings. Not possible, I was told; the audio tapes, while playable, spanned too broad a frequency spectrum from high pitch to low, most of them outside human earshot. But surely, I said, you can speed up and slow down the tape ? I insisted. And, after some fumbling with the then-primitive equipment, they obliged me. We sat and listened. Just listened. Loud high pitch, then low rumblings. Then high pitch again; more rumblings. Change the tape speed: Same pattern. Now, most people listening to this would call it stretches of high-frequency noise interrupted by low patches. But if they had taken the trouble to study the intervals, to analyze the relative proportions of high and low patches, they would have found something else: a turbulent process that proceeds in bursts and pauses, and whose parts scale fractally. The turbulent water  through which the submarine’s nose plowed in a one-dimensional line was not one long alternation of fast and slow water. Instead, seen in all three dimensions, it was a complicated pattern of churning eddies and torrents, all interrelated from start of journey to end of journey—in effect, over an infinite span of time and space. "That experience underlies all my thinking about financial markets." – Benoit B. Mandelbrot, "The (Mis)Behavior of Markets: A Fractal View of Financial Turbulence" Awards. "Burrfish" received five battle stars for her World War II service.