This is a list of yard and district craft of the United States Navy. It covers the various types of craft and ships that support the bases and harbors of the United States Navy. The hull classification symbols for these craft begin with (Y).
Ship status is indicated as either currently active [A] (including ready reserve), inactive [I], or precommissioning [P]. Ships in the inactive category include only ships in the inactive reserve, ships which have been disposed from US service have no listed status. Ships in the precommissioning category include ships under construction or on order.
Historical overview Yard and district craft of the United States Navy perform similar functions as auxiliaries but generally are smaller and less capable than their ocean-going counterparts, and so they generally remain in harbors and coastal areas unless transiting to new assignments.
This list demonstrates that the US Navy constantly recycles and repurposes its small craft for new roles. Some craft on this list have had as many as six such conversions in their history. Some of these conversions have been surprising from an environmental viewpoint, such as the conversion of fuel oil barges into water barges. Some conversions have been surprising from an economic viewpoint, such as the simultaneous conversions of open barges to covered barges during the conversions of covered barges to open barges, which can be justified only by relatively high transportation costs.
The District auxiliary, miscellaneous (YAG) designation has been used as a cover for at least two ships employed in classified tests of biological, chemical, and nuclear weapons (aka WMD).
Some of these vessels have held prior or later classifications as unclassified miscellaneous (IX), or more rarely as auxiliaries miscellaneous (AG, T-AG).
Ash barges (YA) YA-18, ex-YO-37, ex-YE-14, later YCF-5, YFN-570 YA-43, later YF-56 YA-44, later YF-54 YA-52, lost due to enemy action in the Philippines YA-59, lost due to enemy action in the Philippines YA-65, lost due to enemy action in the Philippines
District auxiliary, miscellaneous (YAG) For similar lists of 'miscellaneous' ships see
and List of unclassified miscellaneous vessels of the United States Navy (IX) Tatoosh (YAG-1)YAG-1 YAG-2, lost due to enemy action in the PhilippinesYAG-2 YAG-3, lost due to enemy action in the PhilippinesYAG-3 YAG-4, sunk by Japanese gunfire in South Harbor, Corregidor, 12 April 1942YAG-4 YAG-5YAG-5 YAG-6YAG-6 YAG-7, patrol vesselYAG-7 YAG-8, later AG-47, weather shipYAG-8 YAG-9, later AG-48, weather ship, sunk 9 September 1942 by U-755YAG-9 YAG-10, acquisition canceledYAG Baranof (YAG-11), cargo ship for Alaskan basesYAG-11 YAG-12, liberty ferry and barracks shipYAG-12 YAG-13, ex-Palace (PYc-33)YAG-13 YAG-14, ex-Tourist (PYc-32)YAG-14 Mindoro (YAG-15)YAG-15 YAG-16, cargo ship for Bahamian and Cuban basesYAG-16 YAG-17, moored attack transport simulator, wrecked in the 1944 Great Atlantic hurricane 14 September 1944YAG-17 YAG-18, refrigerator cargo ship for Caribbean basesYAG-18 YAG-19, cargo ship for Caribbean basesYAG-19 YAG-20, ex-YHB-15, cargo ship for Caribbean basesYAG-20 YAG-21, ex-YHB-17, cargo ship for Caribbean bases, grounded near Key West 2 March 1945YAG-21 YAG-22, later YF-568YAG-22 Ensenada (YAG-23), refrigerator cargo shipYAG-23 Awahou (YAG-24)YAG-24 Port Whangarei (YAG-25)YAG-25 Taupata (YAG-26)YAG-26 Kohi (YAG-27), sailing scowYAG-27 YAG-28, cargo ship for Caribbean basesYAG-28 YAG-29, ex-CG-4YAG-29 YAG-30YAG-30 YAG-31YAG-31 Christiana (YAG-32), seaplane tender, ex-IX-80YAG-32 YAG-33, ex-USAS FS-80YAG-33 YAG-34, torpedo range tenderYAG-34 Nashawena (YAG-35), ex-AG-142, cable repair craft Floyd W. Spencer (YAG-36), experimental minesweeper YAG-36 John L. Sullivan (YAG-37), experimental minesweeper YAG-37 Edward Kavanagh (YAG-38), experimental minesweeper YAG-38 George Eastman (YAG-39), WMD test ship Granville S. Hall (YAG-40), WMD test ship YAG-41 through YAG-44, not used, intended for first 4 Guardian-class YAGR radar picket ships YAG-45 through YAG-55, not used, planned ship acquisitions canceled YAG-56, not used, intended for USS Compass Island (E-AG-153) YAG-57, not used, intended for USS Observation Island (E-AG-154) YAG-58, not used, intended for USS Francis Marion (APA-249) or for Jupiter ballistic missile ship Michael Moran (YAG-59) Butternut (YAG-60), ex-AN-9, ANL-9, missile range shipYAG-60 Monob One (Mobile Noise Barge) (YAG-61), ex-YW-87, ex-IX-309YAG-61 Deer Island (YAG-62)YAG-62 Saluda (YAG-87), sailing yawl, sound test ship, ex-IX-87YAG-87
Radar picket ships (YAGR)
Guardian-class radar picket ship
All Guardian-class ships were reclassed as AGR in 1958; they were originally intended to be classed as District auxiliaries, miscellaneous (YAG) - see YAG-41 through YAG-44 - but this was not done.
USS Guardian (YAGR-1) USS Lookout (YAGR-2) USS Skywatcher (YAGR-3) USS Searcher (YAGR-4) USS Scanner (YAGR-5) USS Locator (YAGR-6) USS Picket (YAGR-7) USS Interceptor (YAGR-8) USS Investigator (YAGR-9) USS Outpost (YAGR-10) USS Protector (YAGR-11) USS Vigil (YAGR-12) USS Interdictor (YAGR-13) USS Interpreter (YAGR-14) USS Interrupter (YAGR-15) USS Watchman (YAGR-16)
Open barges (YC, YCK)
YC-119, later YFN-48 YC-164, later YR-5 YC-174, later YFN-86, lost Philippines 1942 YC-179, later YFN-162 YC-181, lost due to enemy action in the Philippines 1942 YC-203, later YFN-211 YC-210, later YF-53 YC-263, later YFN-674, YHB-36 YC-239, later YFN-198 YC-246, later YFN-200 YC-261, later YFN-250 YC-264, later YFN-251 YC-271, ex-YE-39, later YFN-243 YC-273, later YFN-244 YC-274, later YR-20 YC-275, later YFN-208 YC-276, later YFN-209 YC-278, later YFN-248 YC-280, ex-YFN-239, later YRB-14 YC-282, ex-YE-38, later YFN-242 YC-284, later YFN-254 YC-285, later YFN-246 YC-291, later YFN-225 YC-292, ex-YE-34, later YFN-238 YC-294, later YR-21 YC-295, later YFN-253 YC-296, later YR-22 YC-303, later YFN-187 YC-305, later YFN-255 YC-311, later YFN-247 YC-315, later YFN-249 YC-321, later YFN-217 YC-326, later YFN-70 YC-327, later YFN-71 YC-328, later YFN-90 YC-329, later YFN-91 YC-331, later YFN-74 YC-332, later YFN-75 YC-333, later YFN-76 YC-351, later YFN-83 YC-352, later YFN-84, destroyed 1943 YC-353, later YFN-85 YC-363, later YFN-88 YC-364, later YFN-89 YC-383, later YFN-199 YC-412, later YFN-111 YC-415, later YCD-1, YOS-1 YC-442 - sank 11 September 1923 YC-446, later YFN-87 YC-455, later YR-8 YC-456, later YR-9 YC-462, later YFN-245 YC-463, ex-YPK-4, later YF-672 YC-467, later YFN-218 YC-468, ex-YE-36, later YFN-240 YC-469, ex-YE-37, later YFN-241 YC-473, Operation Wigwam nuclear test participant, destroyed YC-480, later YFN-186 YC-484, ex-YE-32, later YFN-236 YC-485, ex-YE-33, later YFN-237 YC-488, later YFN-226 YC-504, later YFN-220 YC-523, lost off Portsmouth New Hampshire 24 February 1944 YC-537, lost due to enemy action in the Philippines 1942 YC-623, later YFN-256 YC-643, lost due to enemy action in the Philippines 1942 YC-644, lost due to enemy action in the Philippines 1942 YC-646, lost due to enemy action in the Philippines 1942 YC-647, lost due to enemy action in the Philippines 1942 YC-648, lost due to enemy action in the Philippines 1942 YC-649, lost due to enemy action in the Philippines 1942 YC-650, later YFN-540 YC-652, lost due to enemy action in the Philippines 1942 YC-653, lost due to enemy action in the Philippines 1942 YC-654, lost due to enemy action in the Philippines 1942 YC-664, lost due to enemy action at Guam December 1941 YC-665, lost due to enemy action at Guam December 1941 YC-666, lost due to enemy action at Guam December 1941 YC-667, lost due to enemy action at Guam December 1941 YC-668, lost due to enemy action at Guam December 1941 YC-669, lost due to enemy action in the Philippines 1942 YC-670, lost due to enemy action at Guam December 1941 YC-671, lost due to enemy action at Guam December 1941 YC-672, lost due to enemy action at Guam December 1941 YC-673, lost due to enemy action at Guam December 1941 YC-674, lost due to enemy action at Guam December 1941 YC-683, lost due to enemy action in the Philippines 1942 YC-685, lost due to enemy action at Guam December 1941 YC-693, lost off Alaska February 1945 YC-701, later YR-23 YC-792, later YFN-1151 YC-714 lost due to enemy action in the Philippines 1942 YC-715 lost due to enemy action in the Philippines 1942 YC-716 lost due to enemy action in the Philippines 1942 YC-717 lost due to enemy action at Guam December 1941 YC-718 lost due to enemy action at Guam December 1941 YC-805, later YFN-1153 YC-813, ex-YF-334 YC-857, lost off Cape Cod Massachusetts 12 November 1943 YC-860, later YFN-676 YC-861, later YFN-677 YC-862, ex-YFN-678, later YRB-10 YC-869, lost off Imperial Beach California 23 March 1943 YC-886, lost at Guantanamo Cuba 3 February 1943 YC-887, lost at Guantanamo Cuba 3 February 1943 YC-891 - sank on 18 April 1945, while under tow by the tug Mauvila (YT-328) off Key West, Florida YC-898, lost off Key West Florida 29 September 1942 YC-899, lost off Key West Florida 29 September 1942 YC-908, later YFN-1149 YC-912, lost in the North Pacific 13 January 1945 YC-961, lost at Biorka Island May 1945 YC-970, lost in Puget Sound Washington 14 August 1943 YC-1037, ex-YFN-396 YC-1079, later YRB-22, later YR-92 YC-1212, ex-YFN-1008 YC-1213, ex-YFN-1009 YC-1219, ex-YF-586 YC-1220, ex-YF-587, later YRB-13 YC-1272, lost near San Pedro California June 1945 YC-1278, lost off the Atlantic coast 10 March 1943 YC-1291, later YF-1094 YC-1292, later YF-1095 YC-1293, later YF-1096 YC-1294, later YF-1097 YC-1295, later YF-1098 YC-1343, ex-YFN-938 YC-1349, ex-YFN-285 YC-1353, ex-YFN-637 YC-1355, ex-YFN-508 YC-1354, ex-YFN-699 YC-1356, ex-YFN-904 YC-1378, later YFN-1288 YC-1461, ex-YFN-1226 YC-1462, ex-YFN-1227 YC-1463, ex-YFN-1228 YC-1464, ex-YFN-1229 YC-1498, later YPD-45, YC-1525, later YLC-5 YC 1596, later YFN-1289 YC-1680, ex-YFN-1195
The YCK hull symbol denoted a wooden barge.
YCK-1, lost due to enemy action at Wake Island, December 1941 YCK-2, ex-YF-422, lost 5 November 1943 YCK-3, ex-YF-423 YCK-4, ex-YF-424 YCK-5, ex-YF-425 YCK-6, ex-YF-426 YCK-7, ex-YF-427 YCK-8, ex-YF-428, sank 2.7 miles off Key West, Florida on 12 December 1943 while under tow by Army tug LT-4 YCK-9, ex-YF-429 YCK-10, ex-YF-430 YCK-11, ex-YF-431 YCK-12, ex-YF-432 YCK-13, ex-YF-433 YCK-14, ex-YF-434 YCK-15, ex-YF-435 YCK-16, ex-YF-436 YCK-17, ex-YF-437 YCK-18, ex-YF-438 YCK-19, ex-YF-439 YCK-20, ex-YF-440 YCK-21, ex-YF-441 YCK-22, ex-YF-442
Coaling derricks (YCD) YCD-1, ex-YC-415, later YOS-1
Car floats (YCF)
YCF-5, ex-YO-37, ex-YE-14, ex-YA-18, later YFN-570 YCF-23, lost en route to Eniwetok March 1945 YCF-29, lost en route to Eniwetok March 1945 YCF-36, lost en route to Eniwetok March 1945 YCF-37, lost en route to Eniwetok March 1945 YCF-42, lost December 1944 YCF-59, lost off Delaware January 1945 YCF-73, later YFN-1126 YCF-81, later YFN-1127 YCF-86, later YFN-1128 YCF-87, later YFN-1129 YCF-88, later YFN-1130 YCF-90, later YFN-1131 YCF-91, later YFN-1132 YCF-92, later YFN-1133 YCF-93, later YFN-1134 YCF-94, later YFN-1135
Aircraft transportation barges (YCV) YCV-6, later YFN-1093 YCV-9, Operation Castle nuclear test participant
Floating derricks (YD)
YD-19, lost to enemy action in the Philippines YD-23, ex-YR-1 YD-36, ex-YFN-72 YD-37, later YFN-196 YD-39, later YFN-197 YD-43, ex-ID-3507 YD-47, lost to enemy action in the Philippines YD-56, lost to enemy action in the Philippines YD-60, lost to enemy action in the Philippines YD-171, German war prize Schwimmkran nr. 1 YD-222, ex-US Army BD 6652, later IX-533 YD-261
Degaussing craft (YDG)
Diving tenders (YDT) YDT-4, ex-AMc-79