A ServRon is a standard United States Navy abbreviation for "Service Squadron."
A Service Squadron was a squadron of U.S. Navy ships that served the fleet. The squadron included ships such as tankers, oilers, refrigerator ships, ammunition ships, supply ships, repair ships, and the like. The commander of the service squadron (ComServRon) was responsible for the operation of all ships in his/her squadron.
The Commander of the Service Squadron is known as ComServRon or COMSERVRON (followed by a number), such as COMSERVRON SEVEN.