Orca XLUUV on its transport cradle (Navy program office photo, GAO-22-105974, Sep 2022)U.S. Navy photo (via GAO-22-105974) · Public domain · Source

Vehicles delivered (identified)

Publicly confirmed deliveries in this dataset

On order / in production

Contracted quantities, not yet delivered

Programs & prototypes tracked

5 program lines · 4 prototypes/testbeds

Battle force

Not counted (SECNAVINST 5030.8D, Encl. 4)

Context

PB27 Shipbuilding Plan (May 2026) invests $135.8M in the Orca XLUUV in FY27 and organizes undersea investment across all four UUV size families. The Navy accepted the Orca test asset (XLE0) in Dec 2023, with Orca 1–5 to follow (NAVSEA). The FY2026 NDAA (Sec. 1020) exempts Navy USVs and UUVs from certain NAVSEA technical-authority requirements. SECNAVINST 5030.8D classifies UUVs by diameter and does not count them in the battle force.

SECNAVINST 5030.8D size classes

Class	Name	Definition	Delivered	On order
SUUV	Small UUV	3 – 10 in diameter	5	0
MUUV	Medium UUV	Over 10 – 21 in	92	0
LUUV	Large UUV	Over 21 – 84 in	1	0
XLUUV	Extra-Large UUV	Over 84 in	1	5

Mk 18 Mod 1 Swordfish UUV operating in San Diego Bay during an expeditionary mine countermeasures exchange, 6 Nov 2019 (cropped)U.S. Navy photo by Lt. Kara Handley · Public domain · Source

Mk 18 Mod 2 Kingfish recovered after sonar survey testing, CTG 56.1, U.S. 5th FleetU.S. Navy photo by MC1 Blake Midnight · Public domain · Source

Official NAVSEA illustration of the Snakehead LDUUV prototypeU.S. Navy (NAVSEA) illustration · Public domain · Source

Programs

ID / hull	Name / model	Program	SECNAV class	Size basis	Status	Delivered	On order	Builder	Key dates	Sources
Mk 18 Mod 2	Kingfish	MK 18 family	MUUV (est.)	Diameter not yet sourced	Fielded; production complete Feb 2023	90	0	HII (Hydroid)	Production completed 2023-02-03	S-U11
Knifefish	Knifefish SMCM UUV	Knifefish	MUUV (est.)	Diameter not yet sourced	Program of record (Milestone C, low-rate initial production approved Aug 2019)	—	—	General Dynamics Mission Systems	Milestone C 2019-08-23	S-U12
Mk 19	Razorback	Razorback (dry deck shelter launched)	MUUV (est.)	Navy calls it medium-class (S-U19). Diameter not yet sourced	Fielded; procurement began FY2017, fleet deployments from FY2021	2	—	HII (REMUS 600 base vehicle)	Procurement began FY2017; 2 delivered by Feb 2021; deployments from FY2021; French SSN launch Mar 2026	S-U19; S-U20; S-U21; S-U23
Mk 18 Mod 1	Swordfish	MK 18 family	SUUV	7.5 in diameter (REMUS 100 base vehicle; S-U16, S-U17)	Fielded; service-common program of record (Navy mine warfare UUV platoons, EOD units, SOF)	—	0	HII (Hydroid)	In service by 2016 (S-U16)	S-U16; S-U17; S-U18; S-U22
Lionfish	Lionfish SUUV	Lionfish (SUUV program of record)	SUUV	7.5-8.13 in diameter (REMUS 300 base vehicle; S-U25)	In production; program of record replacing Mk 18 Mod 1	2	—	HII (REMUS 300 base vehicle)	DIU/PMS 408 prototype 2022; contract 2023; first 2 delivered Apr 2025; 42 built by end 2025; option exercised Jul 2026	S-U24; S-U25; S-U26; S-U27

Prototypes & testbeds

ID / hull	Name / model	Program	SECNAV class	Size basis	Status	Delivered	On order	Builder	Key dates	Sources
XLE0	Orca test asset (XLE0)	Orca XLUUV	XLUUV	Navy XLUUV definition: diameter over 84 in (S-U31); smaller dedicated test vessel (S-U10)	Delivered Dec 2023 (test and training asset)	1	0	Boeing (with HII)	Accepted Dec 2023	S-U33; S-U34; S-U31
XLUUV 1-5	Orca (XLE1-XLE5)	Orca XLUUV	XLUUV	85 ft, 85 t (S-U10); Navy XLUUV definition: diameter over 84 in (S-U31)	XLE1 reported delivered (single source); XLE2 christened Mar 2026; XLE3-5 in production	—	5	Boeing (with HII)	Boeing selected 2019-02-13 (4 vehicles); 5th added 2019-03-27; XLE2 christened Mar 2026	S-U31; S-U33; S-U10; S-U08
LDUUV 1	Snakehead	Snakehead LDUUV	LUUV (est.)	Too large for a 21-in torpedo tube; launched from dry deck shelter (S-U15). Diameter not yet sourced	Prototype in Navy inventory; Phase 2 cancelled in FY2023 budget; demos restarted 2024	1	0	Government-built (NUWC Division Newport lead)	Christened 2022-02-02; Phase 2 cut Apr 2022 (FY2023 budget); restart announced Mar 2024	S-U13; S-U14; S-U15; S-U23
Micro-UUV	Riptide Micro-UUV	Riptide Micro-UUV (payload test vehicle)	SUUV	4.875 in diameter (S-U28)	Delivered for payload testing (SPAWAR Systems Center Pacific), 2016	3	0	Riptide Autonomous Solutions	First 3 delivered 2016	S-U28; S-U29

Coverage

Initial dataset. Quantities are publicly confirmed figures only; blanks mean not yet confirmed. Classes marked (est.) await a sourced dimension. Being added next: LBS-UUV gliders, Angler/Fisher, Orca hull-level deliveries and diameters for size-class confirmation.