Review of Autonomous Undersea Vehicle (AUV) Developments 
LONG-TERM MINE RECONNAISSANCE SYSTEM (LMRS) [4,7,8] 
The Long-Term Mine Reconnaissance System (LMRS) is a clandestine mine reconnaissance 
system that employs UUVs that are capable of launch and recovery from LOS ANGELES (SSN 
688) and VIRGINIA (SSN 774) class submarines. The LMRS will provide an early, rapid, 
accurate means of surveying potential mine fields in support of proposed amphibious 
operations, other battle group operations, and for safe ship transit around mined waters. 
Torpedo Tube L&R 
RF and Acoustic 
2 Autonomous UUVs Communications 
Single Sortie Reach 75-120 nm : 
Forward Looking 
Total Area Coverage Rate 400-650 nm Scares Calan 
Area Coverage Rate 35-50 nm2/day bee. 
Multiple Sorties 
Figure 5. LMRS Concept 
The U.S. Navy's UUV program office recently announced the selection of a team headed by 
Boeing Inc. to proceed with detailed design of the Long-Term Mine Reconnaissance System 
(LMRS) (figure 5). Sonatech, Inc., of Santa Barbara, California, will be providing all of the 
acoustic subsystems for this portion of the LMRS program, which includes the advanced 
forward-looking and side-looking mine detection and classification sonars as well as the 
homing/docking and acoustic telemetry sonars. The LMRS is a sophisticated autonomous UUV 
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