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

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[1]

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

List of auxiliaries of the United States Navy § Miscellaneous Ships (AG, T-AG)

and

List of unclassified miscellaneous vessels of the United States Navy (IX)

Tatoosh (YAG-1)[2]

YAG-2, lost due to enemy action in the Philippines[1][3]

YAG-3, lost due to enemy action in the Philippines[4]

YAG-4, sunk by Japanese gunfire in South Harbor, Corregidor, 12 April 1942[5]

YAG-5[6]

YAG-6[7]

YAG-7, patrol vessel[8]

YAG-8, later AG-47, weather ship[9]

YAG-9, later AG-48, weather ship, sunk 9 September 1942 by U-755[10]

YAG-10, acquisition canceled[11]

Baranof (YAG-11), cargo ship for Alaskan bases[12]

YAG-12, liberty ferry and barracks ship[13]

YAG-13, ex-Palace (PYc-33)[14]

YAG-14, ex-Tourist (PYc-32)[15]

Mindoro (YAG-15)[16]

YAG-16, cargo ship for Bahamian and Cuban bases[17]

YAG-17, moored attack transport simulator, wrecked in the 1944 Great Atlantic hurricane 14 September 1944[18]

YAG-18, refrigerator cargo ship for Caribbean bases[19]

YAG-19, cargo ship for Caribbean bases[20]

YAG-20, ex-YHB-15, cargo ship for Caribbean bases[21]

YAG-21, ex-YHB-17, cargo ship for Caribbean bases, grounded near Key West 2 March 1945[22]

YAG-22, later YF-568[23]

Ensenada (YAG-23), refrigerator cargo ship[24]

Awahou (YAG-24)[25]

Port Whangarei (YAG-25)[26]

Taupata (YAG-26)[27]

Kohi (YAG-27), sailing scow[28]

YAG-28, cargo ship for Caribbean bases[29]

YAG-29, ex-CG-4[30]

YAG-30[31]

YAG-31[32]

Christiana (YAG-32), seaplane tender, ex-IX-80[33]

YAG-33, ex-USAS FS-80[34]

YAG-34, torpedo range tender[35]

Nashawena (YAG-35), ex-AG-142, cable repair craft

Floyd W. Spencer (YAG-36), experimental minesweeper [36]

John L. Sullivan (YAG-37), experimental minesweeper [37]

Edward Kavanagh (YAG-38), experimental minesweeper [38]

George Eastman (YAG-39), WMD test ship[39][40][41]

Granville S. Hall (YAG-40), WMD test ship[39][41]

YAG-41 through YAG-44, not used, intended for first 4 Guardian-class AGR radar picket ships[11]

YAG-45 through YAG-55, not used, planned ship acquisitions canceled[11]

YAG-56, not used, intended for USS Compass Island (E-AG-153)[11]

YAG-57, not used, intended for USS Observation Island (E-AG-154)[11]

YAG-58, not used, intended for USS Francis Marion (APA-249)[11] or for Jupiter ballistic missile ship[42]

Michael Moran (YAG-59)[11]

Butternut (YAG-60), ex-AN-9, ANL-9, missile range ship[43]

Monob One (YAG-61), ex-IX-309[44]

Deer Island (YAG-62)[45]

Saluda (YAG-87), sailing yawl, sound test ship, ex-IX-87[46]

Radar Picket Ships (YAGR)

Further information: Radar picket § Converted merchant ships

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[47]

YC-442 - sank 11 September 1923[48]

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[40]

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,[49]

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[1]

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[50]

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[47]

Car Floats (YCF)

Further information: car float

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 [39]

Floating Derricks (YD)

YD-19, lost to enemy action in the Philippines[1]

YD-23, ex-YR-1

YD-36, ex-YFN-72

YD-37, later YFN-196

YD-39, later YFN-197

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

Degaussing Craft (YDG)

Main article: List of mine warfare vessels of the United States Navy § Degaussing Craft (YDG)

Diving Tenders (YDT)

YDT-11, ex-YFN-723, ex-YFNB-12, later YRST-1, IX-526, YR-94

Phoebus (YDT-14), ex-YF-294

Ammunition Barges (YE)

YE-4, later YFN-229

YE-8, later YFN-230, lost 1942

YE-11, later YFN-231

YE-14, ex-YO-37, later YA-18, YCF-5, YFN-570

YE-15, later YFN-232

YE-16, later YFN-233

YE-32, later YC-484, YFN-236

YE-33, later YC-485, YFN-237

YE-34, later YC-292, YFN-238

YE-36, later YC-468, YFN-240

YE-37, later YC-469, YFN-241

YE-38, later YC-282, YFN-242

YE-39, later YC-271, YFN-243

Covered Barges (YF, YFN)

YF barges are self-propelled, YFN barges are not.[51]

Hull numbers 1 through 256 were built before World War II. [52]

YF-4, captured Philippines 1942

YF-5, captured Philippines 1942

YF-6, captured Philippines 1942

YF-23, lost

YFN-48, ex-YC-119

YF-53, ex-YC-210

YF-54, ex-YA-44

YF-55, ex-ferry St. Helena

YF-56, ex-YA-43

YF-57, lost 1921

YFN-70, ex-YC-326

YFN-71, ex-YC-327

YFN-72, later YD-36

YFN-74 ex-YC-331

YFN-75, ex-YC-332

YFN-76, ex-YC-333

YF-77, later YR-11

YFN-83, ex-YC-351

YFN-84, ex-YC-352, destroyed 1943

YFN-85, ex-YC-353

YFN-86, ex-YC-174, lost Philippines 1942

YFN-87, ex-YC-446

YFN-88, ex-YC-363

YFN-89, ex-YC-364

YFN-90, ex-YC-328

YFN-91, ex-YC-329

YFN-111, ex-YC-412

YF-117, later YR-12

YFN-131, ex-YV-26

YFN-133, ex-YV-31

YFN-135, ex-YV-34

YFN-137, ex-YV-53

YFN-138, ex-YV-60

YFN-162, ex-YC-179

YF-177, lost Philippines 1942

YF-178, lost Philippines 1942

YF-179, lost Philippines 1942

YF-180, lost Philippines 1942

YF-181, lost Philippines 1942

YFN-182, ex-YS-72

YFN-183, ex-YS-73

YFN-184, ex-YS-75

YFN-186, ex-YC-480

YFN-187, ex-YC-303

YFN-196, ex-YD-37

YFN-197, ex-YD-39

YFN-198, ex-YC-239

YFN-199, ex-YC-383

YFN-200, ex-YC-246

YFN-208, ex-YC-275

YFN-209, ex-YC-276

YFN-211, ex-YC-203

YF-212, lost due to enemy action in the Philippines 1942

YFN-217, ex-YC-321

YFN-218, ex-YC-467

YFN-220, ex-YC-504

YF-223, lost due to enemy action in the Philippines 1942

YF-224, lost due to enemy action in the Philippines 1942

YFN-225, ex-YC-291

YFN-226, ex-YC-488

YFN-229, ex-YE-4

YFN-230, ex-YE-8, lost due to enemy action in the Philippines 1942

YFN-231, ex-YE-11

YFN-232, ex-YE-15

YFN-233, ex-YE-16

YFN-236, ex-YE-32, ex-YC-484

YFN-237, ex-YE-33, ex-YC-485

YFN-238, ex-YE-34, ex-YC-292

YFN-239, later YC-280, later YRB-14

YFN-240, ex-YE-36, ex-YC-468

YFN-241, ex-YE-37, ex-YC-469

YFN-242, ex-YE-38, ex-YC-282

YFN-243, ex-YE-39, ex-YC-271

YFN-244, ex-YC-273

YFN-245, ex-YC-462

YFN-246, ex-YC-285

YFN-247, ex-YC-311

YFN-248, ex-YC-278

YFN-249, ex-YC-315

YFN-250, ex-YC-261

YFN-251, ex-YC-264

YFN-253, ex-YC-295

YFN-254, ex-YC-284

YFN-255, ex-YC-305

YFN-256, ex-YC-623

Hull numbers 257 through 1153 were built during World War II.[53][54]

YF-257, later YFRT-257

YFN-258, later YRB-1

YFN-268, later YFND-5, later IX-530

YFN-271, later YRB-8

YFN-285, later YC-1349

YF-287, later YFRT-287

YF-294, later Phoebus (YDT-14)

YFN-298, later YRB-25

YFN-310, later YRB-2

YFN-312, later YRB-7

YFN-317, lost due to enemy action in the Philippines 1942

YFN-318, ex-AMC-60

YF-331, ex-Intrepid, later YSR-42

YFN-333, later YRR-3

YF-334, later YC-813

YFN-365, later YRL-5, YR-83

YFN-373, wrecked on Tanaga Island 1946

YF-379 through YF-391, canceled

YFN-396, later YC-1037

YF-401, lost 20 June 1943

YFN-402, later YRB-17

YFN-409, later YRB-18

YF-411, later YFRT-411

YF-415, exploded and sank 11 May 1944

YF-418, later YFRT-418

YF-419, later YFRT-419

YF-422, later YCK-2

YF-423, later YCK-3

YF-424, later YCK-4

YF-425, later YCK-5

YF-426, later YCK-6

YF-427, later YCK-7

YF-428, later YCK-8

YF-429, later YCK-9

YF-430, later YCK-10

YF-431, later YCK-11

YF-432, later YCK-12

YF-433, later YCK-13

YF-434, later YCK-14

YF-435, later YCK-15

YF-436, later YCK-16

YF-437, later YCK-17

YF-438, later YCK-18

YF-439, later YCK-19

YF-440, later YCK-20

YF-441, later YCK-21

YF-442, later YCK-22

YF-447, later YFR-447

YF-451, later YFR-451

YFN-462, later YFT-6

YFN-470, later YRB-3 (sources differ)

YFN-474, later YRB-3 (sources differ[53])

YFN-475, later YRB-4

YFN-476, destroyed 1947

YFN-477, later YRB-5

YFN-480, later YRB-6

YF-487, lost in the Caribbean Sea 18 July 1943

YFN-493, later YRB-9

YFN-508, later YC-1355

YFN-511, later YRB-15

YFN-515, later YRB-19

YFN-516, later YRB-20

YF-519, later YFRT-519

YF-520, later YFRT-520

YF-523, later YNG-42

YF-528, later YNG-43

YFN-540, ex-YC-650

YF-568, ex-YAG-22

YFN-570, ex-YO-37, ex-YE-14, ex-YA-18, ex-YCF-5

YF-575, lost off Atlantic City, New Jersey, 6 May 1943

YF-579, lost at San Francisco, California, 20 September 1943

YF-586, later YC-1219

YF-587, later YC-1220, YRB-13

YFN-589, lost

YF-608, later APL-14

YF-609, later APL-15

YFN-624, later YFNB-7

YF-628, later APL-17

YF-629, later APL-18

YF-630, later APL-19, sunk as target 2002

YF-631, later APL-20

YF-632, later APL-21

YF-633, later APL-22

YFN-637, later YC-1353

YFN-653, later YFP-5

YFN-655, later YFP-6

YF-672, ex-YPK-4, ex-YC-463

YFN-674, ex-YC-263, later YHB-36

YF-675, canceled

YFN-676, ex-YC-860

YFN-677, ex-YC-861

YFN-678, later YC-862, later YRB-10

YF-681 - damaged in the 10 November 1944 explosion of USS Mount Hood (AE-11) in Seeadler Harbor at Manus Island

YFN-685, later YRR-4, YR-89

YFN-699, later YC-1354

YFN-701, lost 1946

YFN-703, lost 1946

YFN-713, later YRB-28

YFN-723, later YFNB-12, YDT-11, YRST-1, IX-526, YR-94

YFN-724, lost off the Farallone Islands 22 March 1945

YFN-725, lost off the Farallone Islands 22 March 1945

YFN-740, later YRBM-19, YFNB-19, YRBM-56

YF-744 - grounded at Buckner Bay, Okinawa, by Typhoon Louise in October 1945

YFN-751, later YFNB-26, YRBM-20

YFN-752, later YFNB-27

YFN-753, later YFNB-28

YF-757 - sank at Buckner Bay, Okinawa, by Typhoon Louise in October 1945

YFN-775, lost 1946

YFN-777, lost at Eniwetok, 6 August 1945

YFN-779, lost 1946

YFN-780, lost 1946

YFN-811, Project SHAD asset[41]

YFN-845, later YRB-21

YF-852, later YFRT-523

YF-853, canceled

YF-854, later Littlehales (AGSC-15)

YF-855 through YF-860 canceled

YF-866, sunk as target 1988

YFN-888, deployed to South Vietnam, sunk as target 1987

YFN-889, deployed to South Vietnam, possibly transferred

YFN-890, deployed to South Vietnam

YFN-894, canceled

YFN-895, canceled

YFN-899, later YFNB-30, YR-93

YFN-904, later YC-1356

YFN-926, lost en route to Pearl Harbor, 8 March 1945

YFN-934, Operation Castle nuclear test participant[39]

YFN-938, later YC-1343

YFN-961, later YRB-16

YFN-971, lost 1946

YFN-975, canceled

YFN-976, cancelled

YFN-985, later YFP-7

YFN-986, later YFP-8

YFN-1007, lost 1948

YFN-1008, later YC-1212

YFN-1009, later YC-1213

YF-1017 through YF-1022, canceled

YF-1023, later YFL-25

YF-1053, canceled

YFN-1062, later YFNB-35, YPD-46[55]

YFN-1064, later YFNB-37, YRB-30

YF-1079, ex-LST-39, ran aground and damaged at Buckner Bay, Okinawa, during Typhoon Louise in October 1945

YF-1080, ex-YP-90

YF-1092, later YFN-1092, YFNX-13, YRST-5, YRB-29

YF-1094, ex-YC-1291

YF-1095, ex-YC-1292

YF-1096, ex-YC-1293

YF-1097, ex-YC-1294

YF-1098, ex-YC-1295

YF-1099 through YF-1123, canceled

YFN-1124, ex-sonar barge

YFN-1125, ex-Sonar Barge

YFN-1126, ex-YCF-73

YFN-1127, ex-YCF-81

YFN-1128, ex-YCF-86

YFN-1129, ex-YCF-87

YFN-1130, ex-YCF-88

YFN-1131, ex-YCF-90

YFN-1132, ex-YCF-91

YFN-1133, ex-YCF-92

YFN-1134, ex-YCF-93

YFN-1135, ex-YCF-94

YFN-1149, ex-YC-908

YFN-1151, ex-YC-792

YFN-1152, ex-YP-629, later YFRN-1152[56]

YFN-1153, ex-YC-805

Hull numbers starting with 1154 were built after World War II.[57]

YFN-1162, later YFP-13

YFN-1170, later YRB-27

YFN-1192, later YLC-1

YFN-1195, later YC-1680

YFN-1207, later YFP-11

YFN-1209, later YFND-31

YFN-1216, later YFP-12

YFN-1226, later YC-1461

YFN-1227, later YC-1462

YFN-1228, later YC-1463

YFN-1229, later YC-1464

YFN-1253, later YFND-30

YFN-1259, later IX-527, submarine test support barge

YFN-1268, later YR-96

YFN-1288, ex-YC-1378

YFN-1289, ex-YC 1596

Yard Ferry Boats or Launches (YFB)

Asp (YFB-1)

Admiral Glass (YFB-2)

Berceau (YFB-3)

Cyane (YFB-4)

Ripple (YFB-5)

Despatch (YFB-6)

Leslie (YFB-7)

Navy Yard (YFB-8)

Wave (YFB-10)

Callao (YFB-11)

San Felipe (YFB-12), lost due to enemy action at Luzon, Philippines[1]

Christine (YFB-13)

Aquidneck (YFB-14)

Conanicut (YFB-15)

Manuwai (YFB-16)

Nihoa (YFB-17)

Monhegan (YFB-18)

Vashon (YFB-19)

League Island (YFB-20)

Calistoga (YFB-21)

Jewel (YFB-22)

Senibeil (YFB-23)

Treasure (YFB-24)

Captiva (YFB-25)

Falkner (YFB-26)

Adak (YFB-28)

Pilgrim II (YFB-30)

Gould Island (YFB-31)

Green Island (YFB-32)

Santa Rosa (YFB-33)

San Leandro (YFB-34)

Sequin (YFB-35)

Staten (YFB-36)

Dewees (YFB-37)

Seabrook (YFB-38)

Calodosi (YFB-39)

Quonset (YFB-40)

Lillian Anne (YFB-41)

Asquith (YFB-42)

Colington (YFB-43)

Royston (YFB-44)

Sheffield (YFB-45)

North (YFB-46)

YFB-47

YFB-48

Metinic (YFB-49)

Magdalena (YFB-54)

Delta King (YFB-55), ex-YHB-6

Delta Queen (YFB-56), ex-YHB-7

San Felipe (YFB-57)

Lacosta (YFB-58)

Arrowsic (YFB-59)

YFB-60

YFB-65

YFB-66

San Felipe (YFB-79)

YFB-82

Waa Hele Honoa (YFB-83)

YFB-86

Moko Holo Hele (YFB-87)

YFB-88 through YFB-91

Leeward (YFB-92) [A], Guantanamo Bay Naval Base[58]

Windward (YFB-93) [A], Guantanamo Bay[59]

YFB-94

YFB-95

YFB-132

Dart (YFB-308)

Santa Rita (YFB-681)

Rosal (YFB-682), lost due to enemy action at Luzon, Philippines[1]

Camia (YFB-683), lost due to enemy action at Cavite, Luzon, Philippines[1]

Dapdap (YFB-684), lost due to enemy action at Luzon, Philippines[1]

Rivera (YFB-685), lost due to enemy action at Luzon, Philippines[1]

Magdalena (YFB-687), lost due to enemy action at Luzon, Philippines[1]

Yacal (YFB-688), lost due to enemy action at Luzon, Philippines[1]

Taposa (YFB-1163)

Patchogue (YFB-1227), ex-ID-1227

YFB-1504

YFB-1516

Porpoise (YFB-2047), ex-ID-2047

YFB-2494

Atlantic (YFB-3268), ex-ID-3268

YFB-4753

Yard Floating Drydocks (YFD)

Further information: Auxiliary floating drydock § Yard Floating Dock (YFD)

All YFDs were reclassified as AFDMs in 1945 (see List of auxiliaries of the United States Navy § Medium Auxiliary Floating Dry Docks (AFDM)).

Dewey (YFD-1), scuttled 8 April 1942 in the Philippines, raised by the Japanese and sunk again by US aircraft on 13 November 1944

YFD-2

YFD-3

YFD-4

YFD-5

YFD-6

YFD-7 through YFD-19

YFD-20, lost off California 31 January 1943[1]

YFD-21

YFD-22 through YFD-61

YFD-62

YFD-63

YFD-64

YFD-65

YFD-66

YFD-67

YFD-68 through YFD-70

YFD-71

YFD-72 through YFD-82

Large Covered Barges, non-self propelled (YFNB)

YFNB-7, ex-YFN-624

YFNB-12, ex-YFN-723, Operation Wigwam nuclear test participant,[40] later YDT-11, YRST-1, IX-526, YR-94

YFNB-13, Operation Wigwam participant[40]

YFNB-19, ex-YFN-740, ex-YRBM-19, later YRBM-56

YFNB-21, later YRBM-16

YFNB-24, later YRBM-17

YFNB-26, ex-YFN-751, later YRBM-20

YFNB-27, ex-YFN-752

YFNB-28, ex-YFN-753

YFNB-29, Operation Wigwam participant[40]

YFNB-30, ex-YFN-899, later YR-93

YFNB-35, ex-YFN-1062, later YPD-46[55]

YFNB-37, ex-YFN-1064, later YRB-30

YFNB-42, later YRBM-47

Dry Dock Companion Craft, non-self propelled (YFND)

YFND-5, ex-YFN-268, later IX-530

YFND-30, ex-YFN-1253

YFND-31, ex-YFN-1209

Barges, special purpose, non-self propelled (YFNX)

YFNX-13, ex-YF-1092, ex-YFN-1092, later YRST-5, later YRB-29

Floating Power Barges (YFP)

YFP-5, ex-YFN-653

YFP-6, ex-YFN-655

YFP-7, ex-YFN-985

YFP-8, ex-YFN-986

YFP-11, ex-YFN-1207

YFP-12, ex-YFN-1216

YFP-13, ex-YFN-1162

Refrigerated Covered Barges (YFR, YFRN)

YFR barges are self-propelled, YFRN barges are not.

The YFR and YFRN hull numbers are part of the YF and YFN sequence.

YFR-443, ex-YF-443, transferred to Columbia[60]

YFR-447, ex-YF-447

YFR-451, ex-YF-451, lost by explosion and fire, 14 miles northwest of Boston MA. harbor, 11 May 1944[61]

YFRN-833 through YFRN-841

YFR-888 through YFR-890

YFRN-997

YFRN-1152, ex-YP-629, ex-YFN-1152[56]

Range Tenders (YFRT)

YFRT-257, ex-YF-257

YFRT-287, ex-YF-287

YFRT-411, ex-YF-411

YFRT-418, ex-YF-418

YFRT-419, ex-YF-419

YFRT-519, ex-YF-519

YFRT-520, ex-YF-520

YFRT-523, ex-YF-852

YFRT-524, ex-T-AG-161

Torpedo Transportation Barges (YFT)

YFT-6, ex-YFN-462

Harbor Utility Craft (YFU)

Most if not all of the early YFU vessels were LCUs which had been retired from amphibious duties due to age.

YFU-71-class: 11 "Skilak" lighters purchased as Commercial off-the-shelf for the Vietnam War[62]

YFU-71, lead ship of class

YFU-73, transferred to Cambodia

YFU-78, destroyed in rocket attack, Da Nang Bridge Ramp, Vietnam, 1969, with loss of most of the crew

YFU-79, later Baylander (IX-514), converted to a helicopter Landing Ship in 1986 for pilot training, nicknamed the "world's smallest aircraft carrier"

YFU-81, transferred to Panama

YFU-82, later IX-506

Garbage Barges (YG, YGN)

YG barges are self-propelled, YGN barges are not.

YG-5[63]

YG-17, Pearl Harbor attack participant[64]

YG-22, lead ship of class

YG-29[65]

YG-39, lost 27 September 1944[1]

YG-44, lost at Pearl Harbor, 7 February 1945[1]

YG-51[66]

YG-53[67]

YGN-70[68]

Ambulance Boats / Small Medical Support Vessels (YH)

YH-1[69]

YH-2[70]

YH-3[71]

YH-4[72]

Houseboats (YHB)

Delta King (YHB-6), later YFB-55

Delta Queen (YHB-7), later YFB-56

YHB-10, ex freighter Domingo Nazabel I, stationed at French Frigate Shoals August 1942 - March 1945, sunk nearby as target.[73][74]

YHB-15, later YAG-20

YHB-17, later YAG-21

YHB-36, ex-YC-263, ex-YFN-674

Salvage Lift Craft, Heavy (YHLC)

Crilley (YHLC 1)[75]

Crandall (YHLC-2)[76]

Heating Scows (YHT)

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Open Landing Barges (YLA)

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Salvage Lift Craft (YLC)

YLC-1, ex-YFN-1192

YLC-5, ex-YC-1525[77]

Salvage Lift Craft, Light (YLLC)

YLLC-1, ex-LCU-1348, transferred to South Vietnam[78]

Dredges (YM, YMN)

YM dredges are self-propelled, YMN dredges are not.

YM-2[79]

YM-4 lost due to enemy action in the Philippines[1]

YM-5, scavenged to build YM-11

YM-11[80]

YM-13, captured at Guam 10 December 1941[81]

YM-37[82]

Seabee (YM-38)[83]

Mud Scows (YMD)

YMD-8[80]

Salvage Lift Craft Medium (YMLC)

YMLC-3, ex-LSM-551, ex-Salvager (ARS(D)-3)

YMLC-4, ex-LSM-552, ex-Windlass (ARS(D)-4)

Motor Mineplanters (YMP)

Main article: List of mine warfare vessels of the United States Navy § Motor Mineplanters (YMP)

Auxiliary Motor Mine Sweepers (YMS)

Main article: List of mine warfare vessels of the United States Navy § Auxiliary Motor Mine Sweepers (YMS)

Yard Motor Tugs (YMT)

YMT-1 through YMT-31

Yard Net Tenders (YN)

Further information: Net laying ship § US Navy

All specially-built yard net tenders were reclassified in 1944 as auxiliary net laying ships, see List of auxiliaries of the United States Navy § Net Laying Ships (AN) for the reclassification result. The 24 impressed tugboats were reclassed as net tender tugs (YNT), later some as tugboats (YTB or YTL).

Aloe-class net laying ships

Aloe (YN-1)

Ash (YN-2)

Boxwood (YN-3)

Butternut (YN-4)

Catalpa (YN-5)

Chestnut (YN-6)

Cinchona (YN-7)

Buckeye (YN-8)

Buckthorn (YN-9)

Ebony (YN-10)

Eucalyptus (YN-11)

Chinquapin (YN-12)

Gum Tree (YN-13)

Holly (YN-14)

Elder (YN-15)

Larch (YN-16)

Locust (YN-17)

Mahogany (YN-18)

Mango (YN-19)

Hackberry (YN-20)

Mimosa (YN-21)

Mulberry (YN-22)

Palm (YN-23)

Hazel (YN-24)

Redwood (YN-25)

Rosewood (YN-26)

Sandalwood (YN-27)

Nutmeg (YN-28)

Teaberry (YN-29)

Teak (YN-30)

Pepperwood (YN-31)

Yew (YN-32)

The 24 impressed commercial tugboats.

Hopocan (YN-33)

Menewa (YN-34)

Oneka (YN-35)

Mahaska (YN-36)

Keshena (YN-37)

Canasatego (YN-38)

Donacona (YN-39)

Mankato (YN-40)

Metea (YN-41)

Okisko (YN-42)

Tahchee (YN-43)

Tamaha (YN-44)

Wapasha (YN-45)

Namontack (YN-46)

Cockenoe (YN-47)

Katlian (YN-48)

Neswage (YN-49)

Annawan (YN-50)

Metacom (YN-51)

Tamaque (YN-52)

Marin (YN-53), ex-AMc-31

Noka (YN-54)

Nawat (YN-55)

Wapello (YN-56)

Ailanthus-class net laying ships

Ailanthus (YN-57)

Bitterbush (YN-58)

Anaqua (YN-59)

Baretta (YN-60)

Cliffrose (YN-61)

Satinleaf (YN-62)

Corkwood (YN-63)

Cornel (YN-64)

Mastic (YN-65)

Canotia (YN-66)

Lancewood (YN-67)

Papaya (YN-68)

Cinnamon (YN-69)

Silverbell (YN-70)

Snowbell (YN-71)

Spicewood (YN-72)

Manchineel (YN-73)

Torchwood (YN-74)

Winterberry (YN-75)

Viburnum (YN-76)

Abele (YN-77)

Terebinth (YN-78)

Precept (YN-79)

Boxelder (YN-80)

Catclaw (YN-81)

Chinaberry (YN-82)

Hoptree (YN-83)

Whitewood (YN-84)

Palo Blanco (YN-85)

Palo Verde (YN-86)

Pinon (YN-87)

Prefect (YN-88)

Satinwood (YN-89)

Seagrape (YN-90)

Shellbark (YN-91)

Silverleaf (YN-92)

Stagbush (YN-93)

Allthorn (YN-94)

Tesota (YN-95)

Yaupon (YN-96)

Cohoes-class net laying ships

Cohoes (YN-97)

Etlah (YN-98)

Suncook (YN-99)

Manayunk (YN-100)

Marietta (YN-101)

Nahant (YN-102)

Naubuc (YN-109)

Oneota (YN-110)

Passaconaway (YN-111)

Passaic (YN-113)

Shakamaxon (YN-114)

Tonawanda (YN-115)

Tunxis (YN-119)

Waxsaw (YN-120)

Yazoo (YN-121)

Net Gate Craft (YNG)

YNG-1 [84]

YNG-20, ex-AM-17

YNG-42, ex-YF-523

YNG-43, ex-YF-528

Net Tender Tugs (YNT)

All these ships were former Yard Net Tenders (YN)

Hopocan (YNT-1)

Menewa (YNT-2)

Oneka (YNT-3)

Mahaska (YNT-4)

Keshena (YNT-5)

Canasatego (YNT-6)

Donacona (YNT-7)

Mankato (YNT-8)

Metea (YNT-9)

Okisko (YNT-10), later YTL-735

Nawat (YNT-11)

Tamaha (YNT-12)

Wapasha (YNT-13), later YTB-737

Namontack (YNT-14), later YTB-738

Cockenoe (YNT-15)

Katlian (YNT-16)

Neswage (YNT-17)

Annawan (YNT-18)

Metacom (YNT-19)

Tamaque (YNT-20)

Marin (YNT-21)

Noka (YNT-22)

Nawat (YNT-23)

Wapello (YNT-24)

Fuel Oil Barges (YO, YON)

YO barges are self-propelled, YON barges are not.

YO-10, ex-YW-2, later YR-19

YO-37, later YE-14, YA-18, YCF-5, YFN-570

YO-41 - sank 22 February 1942 during enemy action in the Philippines[85]

YO-42 - sank 22 February 1942 during enemy action in the Philippines

YO-61, Operation Castle nuclear test participant[39]

USS Syncline (YO-63) - sank in 1972 north of Tahiti[86]

YO-64 - sank due to enemy action in the Philippines in January 1942[87]

YO-77 - damaged in the 10 November 1944 explosion of USS Mount Hood (AE-11) in Seeadler Harbor at Manus Island

YO-120, Operation Castle participant[39]

YO-146 - sank in accident July 1957

YO-156 - lost at Sitka, Alaska in May 1945

YO-157 - lost at Sitka, Alaska in May 1945

YO-159 - torpedoed and damaged 250 nautical miles (460 km) east of Espiritu Santo by Ro-42 on 14 January 1944, scuttled the following day by USS PC-1138[88][89]

YON-160 - sank in Operation Crossroads as an atomic bomb target at Bikini Atoll on 25 July 1946

YO-161 - sank at Eniwetok 29 November 1946

YON-184 - sank at Eniwetok in a typhoon in September 1946[90]

YO-185 - sank off Saipan 16 March 1946

YO-186 - sank off Guam 5 April 1948

YON-187, later YWN-148

YO-196, ex-YOGN-196

YON-252, ex-YOGN-123

YON-367, ex-YOGN-119

Gasoline Barges (YOG, YOGN)

YOG barges are self-propelled, YOGN barges are not.

YOG-32, later YWN-157

YOG-33, transferred to South Vietnam[91]

YOG-42 - under tow by USS Navajo (AT-64) when Navajo was torpedoed and sunk by Japanese submarine I-39 on 12 September 1943, 150 miles East of Espiritu Santo, recovered by USS Sioux (AT-75), later YOGN-42, intentionally beached on Lanai, Hawaiian Islands in 1950[92]

YOG-56, transferred to South Vietnam

YOG-66, transferred to South Vietnam

YOG-71, transferred to South Vietnam

YOG-76 - sank on 13 November 1969 in Cua Viet Cove, South Vietnam after two underwater explosions hit her, refloated and taken to Da Nang, South Vietnam, not repaired due to severe damage[93]

YOGN-82, Operation Castle participant[39]

YOG-80, transferred to South Vietnam

YOG-83 - sank off Kwajalein 16 September 1948

YOG-84 - lost during typhoon at sea off Saipan 14 November 1948

YOG-93, later IX-523 (training hulk for boarding party tactics)

YOGN-116, later YWN-156

YOGN-119, later YON-367

YOGN-123, later YON-252

YOGN-125, ex-YWN-154, later YON

YOG-131, transferred to South Vietnam

YOGN-196, later YO-196

Oil Storage Barges (YOS)

YOS-1, ex-YC-415, ex-YCD-1

Patrol Craft (YP)

Further information: Yard patrol boat

YP-3, ex-USS Sanda

USS Milan (YP-6), ex-WCG-209

YP-10, ex-CG-194

YP-15, ex-CG-149

YP-16, ex-CG-267, destroyed 10 December 1941 at Guam

YP-17, ex-CG-275, captured 10 December 1941 at Guam

YP-18, ex-CG-263

YP-19, ex-CG-177

YP-26, ex-CG-252, destroyed by an explosion in 1942 while beached in a shipyard in the Panama Canal Zone

YP-29, ex-CG-116[94]

YP-45, ex-CG-133

YP-49, ex-CG-182

YP-51, ex-CG-261

During World War II many private fishing and United States Fish & Wildlife Service (US FWS) vessels were pressed into naval service as patrol craft. A small number would be modified for delivering refrigerated food to small isolated island bases, most without any reclassification.

YP-72, ex-Cavalcade, wrecked in Kuluk Bay, Alaska on 17 February 1943[95]

YP-73, ex-Corsair, wrecked in Kodiak, Alaska, on 15 January 1945, 10 killed

YP-74, ex-Endeavor, sunk in collision off Unimak Island, Alaska on 6 September 1942, 4 killed

YP-77, ex-PC-528

YP-90, later YF-1080

YP-105, ex-PC-510

YP-148, ex-Western Queen

YP-150, later AMc-149, IX-177

YP-152, ex-Western Traveler

YP-153, ex-Waldero

YP-155, ex-Storm

YP-179, ex-SP-179

YP-198, ex-SP-588, ex-US FWS Eider

YP-199, ex-US FWS Kittiwake

YP-200, ex-SP-624, ex-US FWS Widgeon

YP-239 - wrecked at Buckner Bay, Okinawa, by Typhoon Louise in October 1945

YP-214, ex-SP-214

YP-251, ex-Foremost

YP-258, later PYc-30

YP-278, ex-Liberty, small refrigerated cargo vessel

YP-279, ex-Navigator, foundered in heavy weather off Townsville, Australia, on 5 September 1943

YP-284, ex-Endeavor, sunk by Japanese destroyers off Guadalcanal on 25 October 1942, 1 killed

YP-289 - wrecked at Buckner Bay, Okinawa, by Typhoon Louise in October 1945

YP-290, ex-Picoroto

YP-345, ex-Yankee, disappeared between French Frigate Shoals and Midway Island on 31 October 1942, 17 killed

YP-346, ex-Prospect, damaged and beached by Japanese 9 September 1942, destroyed 10 September 1942, 1 killed

YP-375, ex-AMb-17, later IX-199[96]

YP-389, ex-Cohasset, ex-AMc-202, sunk by U-701 near Diamond Shoals on 19 June 1942, 6 killed

YP-399, ex-Big Dipper

YP-400

YP-422, ex-Mist, briefly commanded by L. Ron Hubbard

YP-425 Brave, ex-PYc-34[97]

YP-448 - later IX-200

YP-449 - later IX-201

YP-506, ex-ID-1217

YP-617 - small refrigerated cargo vessel

YP-618 - small refrigerated cargo vessel

YP-629, later YFN-1152, YFRN-1152[56]

YP-663, ex-SP-663 (duplicate number from after WWI)

YP-714, ex-SP-714 (duplicate number from after WWI)

Later purpose-built yard patrol craft would be assigned mainly to train US Naval Academy and US Merchant Marine Academy midshipmen.

YP-654 through YP-675

YP-676 through YP-682

YP-683 through YP-702

YP-703 through YP-708

Floating Pile Drivers (YPD)

YPD-22, lost due to enemy action in the Philippines[1]

YPD-36[98]

YPD-37, ex-YSD-61[99]

YPD-45, ex-YC-1498[49]

YPD-46, ex-YFN-1062, ex-YFNB-35[55]

Pontoon Storage Barges (YPK)

YPK-4, later YC-463, YF-672

YPK-6, lost due to enemy action in the Philippines

YPK-7, lost due to enemy action in the Philippines

Floating Workshops (YR)

YR-1, later YD-23[100]

YR-2

YR-3

YR-4, reported missing

YR-5, ex-YC-164

YR-6

YR-7

YR-8, ex-YC-455

YR-9, ex-YC-456

YR-10

YR-11, ex-YF-77

YR-12, ex-YF-117

YR-13 through YR-18

YR-19, ex-YW-2, ex-YO-10

YR-20, ex-YC-274

YR-21, ex-YC-294

YR-22, ex-YC-296

YR-23, ex-YC-701

YR-24

YR-25

YR-26, ex-YRR-5

YR-27 through YR-30

YR-31, later YRR-7, later YR-90

YR-32, later YRR-8

YR-33 through YR-35

YR-36, later YRB-31, later YRBM-54

YR-37

YR-38

YR-39, later YRR-6

YR-40

YR-41

YR-42, ex-YTT-3

YR-43, lost in the Gulf of Alaska, 28 March 1945[1]

YR-44, later YRBM-48

YR-45

YR-46, later YRBM-49

YR-47

YR-48

YR-49, later YRR-1

YR-50, later YRBM-50

YR-51

YR-52, later YRDM-1

YR-53, later YRDM-2

YR-54, later YRDM-3, YRR-13

YR-55, later YRDH-1, later IX-528 submarine test support barge

YR-56, later YRDH-2

YR-57, later YRDH-3, later YRR-11

YR-58

YR-59

YR-60, later YRBM-51

YR-61

YR-62

YR-63, later YRB-36

YR-64 through YR-66

YR-67, later YRB-32

YR-68, later YRB-34

YR-69 through YR-72

YR-73, later YRB-33

YR-74, later YRR-2

YR-75