One of the member services of the Potomac Speleological Club is The Potomac Caver newsletter. Often called simply "the Caver," this monthly publication is sent to all members, applicants, and subscribers.

The main purposes of the newsletter are to provide a medium for articles, to convey news about the PSC and its members, and to provide a calendar of upcoming caving trips and other events. Articles include trip reports, party reports, scientific information, advertisements for upcoming trips and parties, excerpts from other caving newsletters, and other caving-related commentary. The newsletter also serves as a medium for publishing cave maps and caving-related graphic arts, cartoons, and photography. Each November, an address list of PSC members and applicants is included with the Caver, and a telephone list is included in the July issue.

In addition to PSC members, applicants, and subscribers, the Caver is sent to other caving organizations with which the PSC has a newsletter exchange arrangement. Members of the PSC may borrow previous issues of the Caver from the PSC library. The PSC archivist also keeps one copy of each issue. Articles and other materials for publication should be submitted to the editor of the Caver in time for the next printing date.