USCG Auxiliary is USCG
From the USCG website:
https://www.dhs.gov/us-coast-guard-auxiliary
The United States Coast Guard Auxiliary is the uniformed auxiliary service of the United States Coast Guard.
It is comprised of 26,000 members who volunteer their time to support the operation of the Coast Guard, promote and improve recreational boating safety, and provide trained crews and facilities to enhance the safety and security of US ports, waterways, and coastal regions.
The Coast Guard Auxiliary has units in all 50 states, Puerto Rico, the Virgin Islands, American Samoa, and Guam, and participate in the following kinds of missions:
Safety and Security Patrols
Search and Rescue
Mass Casualty or Disasters
Pollution Response & Patrols
Homeland Security
Recreational Boating Safety
Commercial Fishing and Vessel Exams
Platforms for Boarding Parties
Recruit for all service in the Coast Guard
In addition to the above, the U.S. Coast Guard Auxiliary operates in any mission as directed by the Commandant of the U.S. Coast Guard or Secretary of Homeland Security.