Mobile Inshore Undersea Warfare Unit = fancy name for a radar or sonar operator
Well, a little more than just that:
A Mobile Inshore Undersea Warfare Unit (MIUWU) is a component of the United States Navy's Force Protection Package tasked with providing seaward security to joint logistics over-the-shore operations from either a port or harbor complex or unimproved beach sites. The mobile inshore undersea warfare unit is equipped with mobile radar, sonar, and communications equipment located within mobile elements, such as a tent, specially modified HMMWV, or truck-mountable container.
Units designations and locations.
Group One (West)
MIUWU 101 - Seattle WA
MIUWU 102 - Spokane WA
MIUWU 103 - San Francisco CA
MIUWU 104 - San Jose CA
MIUWU 105 - Long Beach CA
MIUWU 106 - San Diego CA
MIUWU 108 - Corpus Christi TX
MIUWU 109 - Dallas TX
MIUWU 110 - Portland OR
MIUWU 112 - St. Louis MO
MIUWU 114 - Whitman AFB MO