Normally there were four to six active boats in a squadron at one time. Squadrons with vast numbers listed had frequent reassignments during the war. Some boats will be listed with more than one squadron due to transfers. Some of the early numbers were decommisioned during the war due to obsolesence rather than operation losses. Other boats were reclassified later in the war as Non-combat small boats for use in various courier and non-patrol missions. Some boats never served in the US Navy , being sent to other countries as part of lend lease.

Notes:

A. PT 8 was the only all aluminum hull boat.

B. Experimental rocket launchers were installed on the bow of PTs 211, 203 and 202. They were noted as only being used twice vs other boats since the ignition flame pinpointed their location.

C. The Elco Thunderbolt system was a Quad 20mm deployed with Sqdn 29 on at least 4 boats.

D. For long missions PT boats carried extra fuel on deck in drums or rubber tanks which were often dumped if early contact was made with the enemy.

E. For deception Operations boats were often outfitted with loudspeakers.

F. On of the most effective additional pieces of equipment was the floatable smoke pots which the boats could drop over the side when needed.

Scraped as Obsolete = (#). Lend Lease to Britain = (*). Reclassified as

Non-Combat Small Boat = (@). Code = Length/ Model / PT numbers of that model

MTB 1 : 58' Fischer = 3*,4* ; 81' Higgins = 5*,6* ; 81' Philadelphia = 7*,8 ; 70' Scott-Paine = 9* ; 77' Elco = 20 -29, 30, 31, 33, 35, 37, 39, 41, 42, 43

MTB 2 (A): 81' Philadelphia = 8 ; 70' Scott-Paine = 9*; 70' Elco = 10*, 11*, 12*, 13*, 14*, 15*, 16*, 17*, 18*, 19* ; 77' Elco = 20, 21, 22, 23, 24@, 25, 26 27@, 28, 30, 32, 34, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 59, 60, 61; 80' Elco = 109, 110 - 113, 144 - 148

MTB 2 (B) Special Operations Squadron (OSS) : 78' Higgins = 71, 72, 199

MTB 3 (A) (In Philippines 1941-42) : 77' Elco = 31, 32, 33, 34, 35, 41

MTB 3 (B) (Solomons 1942) : 77' Elco = 21, 23, 25, 26, 36@, 37, 38@, 39@, 40@, 45@, 46@, 47@, 48@, 59@, 60, 61@

MTB 4 : Training Squadron = Had many boats assigned then transferred to other units.

MTB 5 : (Solomons 1943) Elco' = 62@, 63, 64@, 65@; 80' Elco = 103, 104, 105, 106, 107, 108, 109, 110 - 114, 314 - 319

MTB 6 : (South Pacific 1942-44) Elco 80' = 115- 119, 120, 121, 123-126, 187, 188, 189

MTB 7 : (New Guinea & Philppines) 80' Elco = 127- 138.

MTB 8 : (New Guinea 1942-43) 77' Elco = 66@, 67, 68; 80' Elco = 110, 113, 114, 120, 121, 122, 129, 130, 142 -150, 188, 189

MTB 9 : (South Pacific 1942-445) 80'Elco = 126, 151-159, 160, 161, 162, 187, 318, 319

MTB 10 : (South Pacific) 80' Elco = 108, 116, 124, 125, 163, 164, 166- 169, 170, 171, 172, 174.

MTB 11 : (South Pacific) 80' Elco = 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186

MTB 12 : (New Guinea) 80' Elco = 127, 145, 146, 150-152, 187-196

MTB 13 : (Aleutians 1943-44, New Guinea June 1944) 78' Higgins = 73-84

MTB 14 : (Panama Sea) 78' Huckins = 98, 99, 100, 101, 102

MTB 15 : (Mediterranean) 78' Higgins = 201*, 202, 203*-217*, 218

MTB 16 : (Aleutians 1943-44, New Guinea June 1944) 78' Higgins = 71, 72, 213-224, 235, 241, 242, 295-301

MTB 17 : (Philippines 1944-45) 78' Higgins = 71, 72, 225-234

MTB 18 : (SouthWest Pacific) 80' Elco = 103-105, 147, 148, 362- 367; 70' Canadian Power/ similar to Elco = 368 - 371

MTB 19 : (South Pacific - replacement Squad) 78' Higgins = 238 - 244

MTB 20 : (Bouganville, New Guinea, Philippines) 78' Higgins = 235-238, 240, 245-254

MTB 21 : (New Guinea) 80' Elco = 128, 131, 132, 320-331

MTB 22 : (Mediterranean) 78' Higgins = 302-313

MTB 23 : (Bouganville, Philippines) 78' Higgins = 241-244, 277-288

MTB 24 : (New Guinea) 80' Elco = 106, 332-343

MTB 25 : (New Guinea, Philippines) 80' Elco = 115, 134, 344-355

MTB 26 : (Hawaii Defense) 78' Huckins = 255 - 264

MTB 27 : (Treasury Islands, Philippines) 80' Elco = 356-361, 372 - 377

MTB 28 : (Treasury Islands, Philippines) 80' Elco = 378-383, 546 - 551

MTB 29 : (Mediterranean) 80' Elco = 552-563

MTB 30 : (English Channel 1944-45) 78' Higgins = 450-461

MTB 31 : (Treasury Islands, Palau, Okinawa) 78' Higgins = 453-455, 462-473

MTB 32 : (Treasury Islands, Okinawa) 78' Higgins = 474 - 485

MTB 33 : (New Guinea, Philippines) 80' Elco = 137, 138, 488- 497

MTB 34 : (English Channel 1944/ Transferred to USSR) 80' Elco = 498 - 509

MTB 35 : (English Channel 1944/ Transferred to USSR) 80' Elco = 510 - 521

MTB 36 : (New Guinea, Philippines 1944-45) 80' Elco = 522 - 532

MTB 37 : (Treasury Islands, New Hebrides 1944-45) 80' Elcos = 533 - 544

MTB 38 : (Philippines, 1945 Limited action) 80' Elco = 565 - 576

MTB 39 : (Philippines 1945, no action) 80' Elco = 575 - 588

MTB 40 : (Philippines 1945, no action) 80' Elco = 589 - 600

MTB 41 - 45 : Not assigned before the war ended.

Motor Boat Submarine Chasers Squadron 1 : 70' Elco = 1-12 . Transferred to British and reclassified as MGBs 82 -93.

BPTs are British Patrol Boats built in the USA

77' Elcos = BPT 1-10 (Old US 49-58) became MTB 307-316 (March 1942)

78' Higgins = (Old 88, 90-94, 198) became MTB 419-424, ? (April 1943)

70' Vospers = (Old US 384-399) became MTB 396- 411 (Oct 1944)

70' Vospers = BPT 21-28 became MTB 275 - 282 (Nov '42 - Mar '43)

70' Vospers = BPT 29-36 became MTB287 - 294) (Jun 43)

70' Vospers = BPT 37 - 42 became MTB 295- 300 (April 43)

70' Vospers = BPT 43- 48 became MTB 301 - 306 (Mar 43)

70' Vospers = BPT 49 - 52 became MTB 283 - 286 (April 43)

70' Vospers = BPT 61 - 68 became MTB 371 - 378 (Dec 43)

Russian Lend Lease Transfers
RPT are Russian Patrol Boats.

78' Higgins = RPT 1-4, 11 (Old US 85-87,89, 197) (Feb 1943)

78' Higgins = (Old US 265 - 276) (Nov 1943) & (Old US 289 - 294) (Dec 1943)

70' Vospers = (BPT 53 - 60) (Feb 44)

70' Vospers = (Old US 400-449) (Oct 44) & (Old US 661-692) (May 45)

78' Higgins = (Old US 634- 656) (August 45)

90' Elco = (Old US 731 - 760) (Oct 44 - Feb 45)

More US Patrol Boat Operations During World War Two

Introduction
English Channel Engagements 1944
South Pacific Engagements 1941-1945
Mediterranean Engagements 1943-1945
PT Boat Squadrons, Numbers And Boat Models Used Plus Other Notes