USRC Patrol, later USCGC Patrol, was a harbor

Harbor

A harbor or harbour , or haven, is a place where ships, boats, and barges can seek shelter from stormy weather, or else are stored for future use. Harbors can be natural or artificial...

 launch

Launch (boat)

A launch in contemporary usage refers to a large motorboat. The name originally referred to the largest boat carried by a warship. The etymology of the word is given as Portuguese lancha "barge", from Malay lancha, lancharan, "boat," from lanchar "velocity without effort," "action of gliding...

 in service in the United States Revenue Cutter Service

United States Revenue Cutter Service

The United States Revenue Cutter Service was established by Secretary of the Treasury Alexander Hamilton in 1790 as an armed maritime law enforcement service. Throughout its entire existence the Revenue Cutter Service operated under the authority of the United States Department of the Treasury...

 from 1905 to 1915 and in the United States Coast Guard

United States Coast Guard

The United States Coast Guard is a branch of the United States Armed Forces and one of the seven U.S. uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the military branches for having a maritime law enforcement mission and a federal regulatory agency...

 in 1915. She was the first vessel of the Revenue Cutter Service and Coast Guard to bear the name.

She was built at Jersey City, Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

, and was launched in 1899. The Revenue Cutter Service acquired her on 2 June 1905 and employed her on anchorage duty at Chicago, Illinois, although she operated as far south at Hannibal

Hannibal, Missouri

Hannibal is a city in Marion and Ralls counties in the U.S. state of Missouri. Hannibal is located at the intersection of Interstate 72 and U.S. Routes 24, 36 and 61, approximately northwest of St. Louis. According to the 2010 U.S. Census the population was 17,606...

, Missouri

Missouri

Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

.

When the Revenue Cutter Service and United States Lifesaving Service merged in 1915 to form the Coast Guard, Patrol became a part of the new service as USCGC Patrol.

On 31 August 1915, the Coast Guard transferred Patrol to the Illinois Naval Militia

Illinois Naval Militia

The Illinois Naval Militia is a state defense force created by the Illinois General Assembly in 1893. In 1896, it had five divisions: three in Chicago, one in Moline, and one in Alton, of approximately 250, 100, and 50 men respectively. At that time, it received $25,000 in federal money...

at Chicago.