List of unclassified miscellaneous vessels of the United States Navy

The IX (unclassified–miscellaneous) hull classification symbol is used for ships of the United States Navy that do not fit into one of the standard categories. Similar lists of 'miscellaneous' ships can found at

and .

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; IX ships are generally not ordered as such, but are rather converted from other roles.

Historical overview

These vessels usually fall into these categories:

Armed decoys (Q-ships) Experimental vessels Former yachts Mobile base vessels used by service squadrons (command ships, barracks ships, bulk storage ships including tankers, unnamed barges, and floating shipyard equipment) Retired warships Training equipment and simulators (including two Great Lakes-based paddlewheel aircraft carriers) War prizes

As of 2026 only one ship, USS Prevail (IX-537), actively carries an IX hull symbol.

World War II See also

During the naval build-up for World War II at least 45 vessels of Maritime Commission (MarCom, later MarAd) standard designs were converted to US Navy unclassified miscellaneous vessels (several after suffering heavy damage in commercial service): 12 Type EC2 Liberty ships (3 later classed as auxiliaries) 20 Type Z-ET1 Liberty ships (2 later classed as auxiliaries) 13 Type B7-D1 concrete barges

Unclassified miscellaneous vessels (IX)

Annapolis (IX-1), ex-PG-10

Dispatch (IX-2), ex-Boston, protected cruiser Briarcliff (IX-3), receiving ship , ex-BM-10 Alton (IX-5), ex-CA-14, ex-CL-14 Coastal Battleship Number 4 (IX-6), ex-BB-4 Commodore (IX-7), receiving ship, armory Cumberland (IX-8), receiving ship Dubuque (IX-9), ex-AG-6, later PG-17 Essex (IX-10), ex-sloop of war, receiving ship Gopher (IX-11), ex-Fern, training ship, sank while under tow 21 September 1923 Hancock (IX-12), ex-AP-3, receiving ship

Hartford (IX-13), Civil War relic Hawk (IX-14), ex-PY-2 Prairie State (IX-15), ex-BB-7 , ex-BM-9 Monadnock (IX-17), ex-BM-3 Nantucket (IX-18), ex-PG-23 Newport (IX-19), ex-PG-12

Constellation (IX-20), museum ship Constitution (IX-21) [A], later 'none' classification as museum ship still in commission Oregon (IX-22), ex-BB-3 Paducah (IX-23), ex-AG-7, later PG-18 Philadelphia (IX-24), ex-C-4 Reina Mercedes (IX-25), Spanish-American war prize Southery (IX-26) Sturgeon Bay (IX-27) Wheeling (IX-28), ex-PG-14 Wilmette (IX-29) , ex-PG-8 , ex-Michigan Yantic (IX-32) Newton (IX-33), ex-ID-4306 Henry County (IX-34) Topeka (IX-35), ex-PG-35 Light Target Number 2 (IX-36), ex-DD-136, later DMS-3, AG-19 Light Target Number 3 (IX-37), ex-DD-275 Empire State (IX-38), ex-AG-11 Seattle (IX-39), ex-CA-11

Olympia (IX-40), ex-CL-15, later museum ship America (IX-41), converted yacht Camden (IX-42), ex-AS-6 Freedom (IX-43), converted yacht Damage Control Hulk Number 1 (IX-44), ex-DD-163 Favorite (IX-45) Transfer (IX-46) Vamarie (IX-47), converted yacht Highland Light (IX-48), converted yacht Spindrift (IX-49), converted yacht

Bowdoin (IX-50), converted yacht, former Arctic research vessel"In Touch with the World from the Arctic" by Burnham McLeary, Radio Broadcast, August 1923, page 286. Sea Otter I (IX-51) Cheng Ho (IX-52), converted yacht Sea Otter II (IX-53) Galaxy (IX-54)

Black Douglas (IX-55), ex-PYc-45, later royal yacht of Morocco , ex-AT-52 Araner (IX-57), converted yacht Dwyn Wen (IX-58), converted yacht Volador (IX-59), converted yacht Seaward (IX-60), converted yacht Geoanna (IX-61), converted yacht, later US Army TP-249 Vileehi (IX-62), converted yacht Zahma (IX-63), converted yacht

Wolverine (IX-64), ex-SS Seeandbee, Great Lakes Aircraft Training Carrier (CV) Blue Dolphin (IX-65), converted yacht Migrant (IX-66), converted yacht Guinevere (IX-67), converted yacht (note duplicated number) Burleson (IX-67), training ship, ex-APA-67 (note duplicated number) Seven Seas (IX-68), converted yacht Puritan (IX-69), converted yacht Gloria Dalton (IX-70), converted yacht

Kailua (IX-71), ex-CS Dickenson (cable ship) Liberty Belle (IX-72) Zaca (IX-73), converted yacht Metha Nelson (IX-74), converted yacht John M. Howard (IX-75), ex-Elsie Fenimore converted yacht Ramona (IX-76), converted yacht Juniata (IX-77), converted yacht Brave (IX-78), converted yacht El Cano (IX-79), converted yacht Christiana (IX-80), seaplane tender, ex-USLHT Azalea, briefly USS Azalea (returned to USLHT service), later YAG-32

Sable (IX-81), ex-SS Greater Buffalo, Great Lakes Aircraft Training Carrier (CV) Luster (IX-82), converted yacht Ashley (IX-83), converted yacht Congaree (IX-84), converted yacht Euhaw (IX-85), converted yacht Pocotaligo (IX-86), converted yacht Saluda (IX-87), converted yacht, sound test ship, later YAG-87 Wimbee (IX-88), converted yacht Romain (IX-89), converted yacht Forbes (IX-90), converted yacht Palomas (IX-91), converted yacht Liston (IX-92), converted yacht

Irene Forsyte (IX-93), converted yacht, Q-ship (armed decoy) Ronaki (IX-94), converted yacht, grounded eastern Australia, 18 June 1943 Echo (IX-95), converted yacht Richard Peck (IX-96), electric generator Martha's Vineyard (IX-97)

Moosehead (IX-98), ex-DD-259, ex-YW-56, combat information center training ship Sea Cloud (IX-99), ex-WPG-284 weather ship Racer (IX-100), ex-PC-501, SC-501 Big Chief (IX-101) Majaba (IX-102), ex-SS El Capitan, ex-AG-43 E.A. Poe (IX-103), MC type EC2, mobile base dry storage Peter H. Burnett (IX-104), MC type EC2, mobile base dry storage Panther (IX-105), ex-SC-1470 Greyhound (IX-106), ex-ID-1672 Zebra (IX-107), MC type EC2, later AKN-5 Atlantida (IX-108) Antelope (IX-109), MC type EC2, mobile base dry storage

Ocelot (IX-110), mobile base command ship, wrecked by Typhoon Louise Okinawa October 1945

Armadillo-class: MC type Z-ET1-S-C3 hulls, mobile base storage tankersLiberty Tankers type (Z-) ET1-S-C3 Armadillo (IX-111), ex-SS Sidney Howard Beagle (IX-112), ex-SS David Rittenhouse Camel (IX-113), ex-SS William H. Carruth Caribou (IX-114), ex-SS Nathaniel Palmer Elk (IX-115), ex-SS William Winter Gazelle (IX-116), ex-SS Cyrus K. Holliday Gemsbok (IX-117), ex-SS Carl R. Gray Giraffe (IX-118), ex-SS Sanford B. Dole Ibex (IX-119), ex-SS Nicholas Longworth Jaguar (IX-120), ex-SS Charles T. Yerkes Kangaroo (IX-121), ex-SS Paul Tulane Leopard (IX-122), ex-SS William B. Bankhead Mink (IX-123), ex-SS Judah Touro Moose (IX-124), ex-SS Mason L. Weems Panda (IX-125), ex-SS Opie Read Porcupine (IX-126), ex-SS Leif Ericson, sunk by kamikaze 30 December 1944, 7 killed Raccoon (IX-127), ex-SS J. C. W. Becham Stag (IX-128), ex-SS Norman O. Pedrick, converted to a distilling ship, later AW-1 Whippet (IX-129), ex-SS Eugene W. Hilgard Wildcat (IX-130), ex-SS Leon Godchaux, converted to a distilling ship, later AW-2

Other unknown classes Abarenda (IX-131), ex-SS Acme, mobile base storage tanker Andrew Doria (IX-132), ex-SS Aleibiades Antona (IX-133), ex-SS Birkenhead Arayat (IX-134), ex-SS Faireno, mobile base storage tanker Arethusa (IX-135), ex-SS Gargoyle, mobile base storage tanker Carondelet (IX-136), ex-SS Gold Heels, mobile base storage tanker Celtic (IX-137), ex-SS Kerry Patch Malvern (IX-138), ex-SS Orissa Octorara (IX-139), ex-SS Purisima, mobile base storage tanker Quiros (IX-140), ex-SS Osmand Manileno (IX-141) Signal (IX-142), ex-ID-1532, mobile base storage tanker Silver Cloud (IX-143), ex-AO-10, mobile base storage tanker Clyde (IX-144) Villalobos (IX-145) Fortune (IX-146), mobile base aviation stores ship, later AVS-2 Supply (IX-147), mobile base aviation stores ship, later AVS-1 North Star (IX-148), ex-WPG-59 Mustang (IX-155), ex-William H. Smith (fishing schooner), amphibious training ship

City of Dalhart (IX-156), construction battalion (Seebee) command ship, Brodie landing system installed Orvetta (IX-157), ex-Tampa, mobile base barracks

Trefoil-class: MarCom B7-D1 concrete barges Midnight / Trefoil (IX-149) Quartz (IX-150), Operation Crossroads nuclear test participant Silica (IX-151), wrecked by Typhoon Louise Okinawa October 1945 Carmita (IX-152), ex-Slate Asphalt (IX-153), wrecked 6 October 1944 Bauxite (IX-154) Limestone (IX-158) Feldspar (IX-159) Marl (IX-160) Barite (IX-161) Lignite (IX-162), wrecked by Typhoon Louise Okinawa October 1945 Cinnabar (IX-163) Corundum (IX-164)

Other unknown classes Flicker (IX-165), ex-AM-70 Linnet (IX-166), ex-AM-76 Leyden (IX-167), transport Southland (IX-168), transport

President Warfield (IX-169), transport, later SS Exodus Curlew (IX-170), ex-AM-69 Albatross (IX-171), ex-AM-71 Bluebird (IX-172), ex-AM-72 Etamin (IX-173), MC type EC2, ex-AK-93 Grumium (IX-174), MC type EC2, ex-AK-112, mobile base aviation stores ship, later AVS-3 Kestrel (IX-175), ex-AMc-5 Kingbird (IX-176), ex-AMc-56 Nightingale (IX-177), ex-AMc-149 Banshee (IX-178), ex-SS Fairbanks Kenwood (IX-179) Flamingo (IX-180), ex-AMc-22 Egret (IX-181), ex-AMc-24 Donnell (IX-182), ex-DE-56, electric generator Catbird (IX-183), ex-AM-68, mine testing Clifton (IX-184), ex-SS Dilworth Stonewall (IX-185), ex-SS Frank G. Drum Dawn (IX-186), mobile base storage tanker Belusan (IX-187), ex-SS Vistula Chotauk (IX-188), ex-SS American Arrow, mobile base storage tanker Marmora (IX-189), ex-SS F.C. Fitzsimmons, mobile base storage tanker Nausett (IX-190), ex-SS W.M. Irish, mobile base storage tanker Vandalia (IX-191), ex-SS Walter Jennings, mobile base storage tanker, wrecked by Typhoon Louise Okinawa October 1945 Flambeau (IX-192), ex-SS S.B. Hunt, mobile base storage tanker Meredosia (IX-193) Killdeer (IX-194), ex-AMc-21 Goshawk (IX-195), ex-AM-79 Spark (IX-196), ex-LST-340 Mariveles (IX-197) Cohasset (IX-198), ex-LST-129 Barcleo (IX-199), ex-AMb-17, ex-YP-375 Maratanza (IX-200), ex-YP-448 Sterling (IX-201), ex-YP-449 Liberator (IX-202), ex-AMc-87 Agile (IX-203), ex-AMc-111 Allioth (IX-204), MC type EC2, ex-AK-109, mobile base aviation stores ship, later AVS-4

Callao (IX-205), German icebreaker war prize ExternsteinePrice, Arctic Combat:, U.S coast Guard Historian's Office Chocura (IX-206), ex-PC-452

Big Horn (IX-207), ex-AO-45, ex-Q-ship (armed decoy), oil storage vessel Domino (IX-208), mobile base dry storage, not acquired Seaward (IX-209), ex-LST-278 Sea Foam (IX-210), mobile base storage tanker Castine (IX-211), ex-PC-452, experimental engine IX-212, ex-LCI(G)-396 Serapis (IX-213), ex-SS District of Columbia, mobile base storage tanker Yucca (IX-214), ex-SS Utacarbon Don Marquis (IX-215), MC type EC2, mobile base dry storage Unicoi (IX-216), mobile base dry storage Tackle (IX-217), ex-ARST-4 Gardoqui (IX-218), mobile base storage tanker Eureka (IX-221), ex-PC-488 Pegasus (IX-222), ex-AK-48, mobile base dry storage Triana (IX-223), MC type EC2, mobile base dry storage Aide de Camp (IX-224), sonar research, converted yacht Harcourt (IX-225), MC type EC2 Araner (IX-226), MC type EC2 Gamage (IX-227) - same ship as Inca (IX-229) Justin (IX-228), MC type EC2 Inca (IX-229), MC type EC2, mobile base dry storage, grounded by Typhoon Louise Okinawa October 1945 Tapacola (IX-230), ex-AMc-54, target tug Stalwart (IX-231), ex-AMc-105, target tug Summit (IX-232), ex-AMc-106, target tug , sonar test schooner, sank at pier in storm 22 November 1945 , German racing yacht war prize , Naval Academy yacht IX-236 through IX-299 unused

Prinz Eugen (IX-300), German cruiser war prize, Operation Crossroads target Dithmarschen (IX-301), German replenishment oiler war prize, later USS Conecuh (AO-110 / AOR-110) Atlanta (IX-304), ex-CL-104, weapons effects test ship