Cathelco have supplied marine pipework anti-fouling systems for a complete class of fleet replenishment oilers serving the United States Navy. The 14 Henry J. Kaiser Class vessels are operated by the Military Sealift Command and provide underway replenishment of fuel for U.S. Navy ships at sea and jet fuel for aircraft assigned to aircraft carriers. The final vessel in the series to be installed with a Cathelco system will be the USNS Patuxent a fleet replenishment oiler which was built at the Avondale Shipyard and launched in 1991.