Records relating to Daniel John "Jack" Coghlan (1934-2018), early professional diver born in Fort William. He began his career in the Thunder Bay region and later worked around the world, living in California, Australia, Alaska, and Hawaii.

The collection consists of digital copies of photographs, news articles, and documents, as well as written stories contributed by family and friends. Articles relate to Coghlan's career as a salvage diver (Superior Diving & Salvaging Co.) including attempts to salvage the Gunilda and other shipwrecks. Through this era, he was frequently referred to as a "frog man" in news articles. In later years he worked supporting offshore oil development.

The collection was assembled by Sam Coghlan, Jack's brother.