Postal clerk (abbreviated as PC) was a United States Navy occupational rating. Postal clerks: Operate US Navy post offices Supervise, organize and establish or disestablish a US Navy post office Perform postal counter work, including sale of stamps and money orders Process incoming and outgoing mail Route mail Maintain a mail directory Process official mail Maintain security of postal effects and mail matter Process claims and inquiries Prepare and file postal correspondence, records and reports Rating merger Effective 1 October 2009, the ratings of storekeeper (SK) and postal clerk (PC) have merged to become logistics specialist (LS). References See also List of United States Navy ratings United States Navy ratings