CHAPTER IV, SECTION 4 seas prevailing. Remedial measures by HE&N forces consisted of replacing the mooring gear with heavier tackle. At Bikini Atoll the planting and mooring of the instrument cans of the 143 series was accomplished by the U.S. Navy. This work was undertaken at Eniwetok Lagoon by the H&N Marine Department. ASSISTANCE TO LARGE VESSELS. All navy tankers tying to POL buoys were assisted by LOMs. ie sca mule at Eniwetok and an LCMat Bikini were used to pass the POL submarine hose to the tanker and, on completion of delivery of tucl, to relay properly the hose on the bottom. In all beachings of LSTs, these vessels were assisted in making the mole and retracting from the beach. HOUSEBOATS. LCUs were fitted out and operated as houseboats for the initial phases of all beachhead landings; to house and sustain two scientific groups otf Dog-George area after 1 March 1954; and as a station vessel off the Flora Crater for the Nectar event. The hoats were adequate for these uses and eliminated considerable lost time that would have resulted in traveling to and trom an established camp or large vessel. UNDERWATER PIPING. The Marine Department was responsible for maintenance of all submarine piping. In this connection two lines were laid to the POL farm on Sugar, one Jet Fuel line added to the POL farm at Fred, and considerable work undertaken in repairing DATE DEPTH IN FEET Jan. 5, 1953 110 - 120 Apr. 29, 1953 110 - 120 “Apr. 29, 1953 Apr. 30, 1953 1}U - t2u 110 - 120 Apr. 30, 1953 Apr. 30, 1953 May 1, 1953 110 - 120 110 - 120 hI - 120 May1, 1953 May2, 1953 May 2, 1943 May2, 1953 Feb. 23, 1954 111 110 110 110 90 Feb. 23, 1954 Feb. 24, 1954 Feb. 24, 1954 - 120 120 4120 120 100 90 - 100 80 - 90 &0 - 90 exisung POL lines in Eniwetok Lagoon. Prior to the arrival of tankers, all POL lines were te-ted by applying 50 Ibs. sq. in. hydrostatic pressure. The steel piping developed a number af leaks which were repaired by using rubber patching clamped tu the piping. This piping in nil probability will require replacement in the near future. Considerable trouble was experienced with sea moss and trash from vessels at anchor; this foreign matter entered the CMR power plant sea water intake. To lessen this condition, a 9G vertical gooseneck was installed on the Jagoon end of this intake. DIVING OPERATIONS. Al diving operations were performed by volunteers who could definitely prove previous schooling and experience. These men were given a thorough physical examination by the Jobsite doctor prior tu being qualified as divers and were re-examined quarterlv. The deep sea diving operations required during OPERATION CASTLE were largely concerned with the POL submarine hoses, due to the foul bottom. Skin divers were used for shallow water diving in connection with work on underwater piping, hull inspection, inspection of ground tackle for small craft moorings. submarine cahies and waterborne Scientific Stations. The record of deep sea diving operations, which were limited to a depth of 130 feet, for OPERATION CASTLE follows: . DESCKIPTION OF JOB Recover POL saddle Elmer and connect new chain and buoy. Disconnect hose from bent pipe and flange buoy off hose. O. W.O. 2578, POL Eniwetok. Same as above. Luy in three sections of hose and connect up to steel pipe. 2578, POL Eniwetok. Sameas above. Sameas above. Addone section of hose to POL line and connect to stee! pipe flange. O. W. O. 2578, POL Eniwetoh. Same as above. Same as shove. Sameas ahove. Same as ahove. Place chain weights on jet fuel lines POL Eniwetok. Sameas above. Same as above. Sameas ahove. Page 4-45 «4