Long-Term Mine Reconnaissance System

{{short description|American torpedo tube-launched underwater search and survey unmanned undersea vehicle}}

{{Infobox ship begin}} {{Infobox ship image |Ship image= }} {{Infobox ship class overview |Name=AN/BLQ-11 |Builders=Boeing Defense, Space & Security (BDS) |Operators={{flagcountry|USA}} Boeing |Class before= |Class after= |Subclasses= |Cost= |Built range= |In service range= |In commission range= |Total ships building= |Total ships planned= |Total ships completed= |Total ships cancelled= |Total ships active= |Total ships laid up= |Total ships lost= |Total ships retired= |Total ships preserved= }} {{Infobox ship characteristics |Hide header= |Header caption= |Ship type=Unmanned undersea vehicle |Ship displacement={{convert|1244|kg|lb}}) |Ship length={{convert|6|m|abbr=on}} |Ship beam={{convert|0.53|m|abbr=on}} |Ship height={{convert|0.53|m|abbr=on}} |Ship draught= |Ship draft= |Ship depth= |Ship hold depth= |Ship decks= |Ship deck clearance= |Ship ramps= |Ship ice class= |Ship power= |Ship propulsion=Thrusters |Ship sail plan= |Ship speed= |Ship range= |Ship endurance=60 hours (nominal load) |Ship test depth={{convert|1000|m|abbr=on}} |Ship boats= |Ship capacity= |Ship troops= |Ship complement= |Ship crew= |Ship time to activate= |Ship sensors= |Ship EW= |Ship armament= |Ship armour= |Ship armor= |Ship aircraft= |Ship aircraft facilities= |Ship notes= }}

The AN/BLQ-11 autonomous unmanned undersea vehicle (formerly the Long-Term Mine Reconnaissance System (LMRS)) is a torpedo tube-launched and tube-recovered underwater search and survey unmanned undersea vehicle (UUV) capable of performing autonomous minefield reconnaissance as much as{{Cite web |title=Advanced Pressure-Tolerant UUV Batteries for Fleet Use {{!}} SBIR.gov |url=https://www.sbir.gov/content/advanced-pressure-tolerant-uuv-batteries-fleet-use-0 |access-date=2023-08-23 |website=www.sbir.gov}} {{convert|200|km|mi|sp=us}} in advance of a host {{sclass|Los Angeles|submarine|5}}-, {{sclass|Seawolf|submarine|5}}-, or {{sclass|Virginia|submarine|5}}-class{{Citation |title=USS Virginia SSN-774 - Download Free 3D model by KoreanNavy |date=2023-01-11 |url=https://sketchfab.com/models/339f9731013e4b41b87557f261a9892f/embed?autostart=1 |access-date=2023-08-23 |language=en}} submarine.

LMRS is equipped with both forward-looking sonar and side-scan synthetic aperture sonar.

Boeing concluded the detailed design phase of the development project on 31 August 1999.

In January 2006, {{USS|Scranton|SSN-756|6}} successfully demonstrated homing and docking of an LMRS UUV system during at-sea testing.{{cite web |archiveurl=https://web.archive.org/web/20061125045037/http://www.news.navy.mil/search/display.asp?story_id=22618 |archivedate=25 November 2006 |title=USS Scranton Completes Successful UUV Test |website=news.navy.mil |url=http://www.news.navy.mil/search/display.asp?story_id=22618 |date=3 September 2006 |last=Piggott |first=Mark O.}}