The collection consists of seven (7) instructional booklets, each focusing on a different aspect of maritime mechanics. Folded
into each booklet is a test on the subject matter taken by Lt. Herschel Yim.
Herschel H.C. Yim was born in San Francisco in 1919 and worked aboard various vessels as a marine engineer. The United States
Maritime Service (USMS) was established in 1938 under the provisions of the Merchant Marine Act of 1936. The mission of the
organization is to train people to become officers and crew members on merchant ships that form the United States Merchant
Marine per Title 46 U.S. Code 51701.
Some material may be copyrighted or restricted. It is the researcher's obligation to determine and satisfy copyright or other
case restrictions when publishing or otherwise distributing materials found in the collections.
This collection is open for use unless otherwise noted.