A second Chinese Navy facility for degaussing submarines and others vessels has been located about 5 miles from Maocao Nong Navy base, home to some 19 Kilo Class conventional submarines.
FAS Strategic Security Blog has more:
By Hans M. Kristensen
The East Sea Fleet facility was built between August 2007 and March 2008.
The East Sea Fleet facility is the second known Chinese demagnetization facility. In April 2008, I identified the first such facility at the South Sea Fleet base near Yulin on Hainan Island.
The South Sea Fleet facility was constructed sometime between January 2006 and February 2008.
The two demagnetization facilities are similar but with differences. The South Sea Fleet facility is built in a c-shape, similar to the U.S. design. The East Sea Fleet facility, which is located in a river, consists of two parallel piers, perhaps to accommodate strong currents.The Purpose of Demagnetization
Demagnetization is conducted before deployment to remove residual magnetic fields in the metal of a vessel to make it harder to detect by other submarines and surface ships. It reduces the ship’s vulnerability to mines that are triggered by magnetic signals from metal hulls. Demagnetization apparently also can improve the speed of the vessel.
This is another upgrade for PLAN facilities and their strategic abilities. It allows for a better outcome than portable, shipborne systems. Read the whole article to get a feel for not just why degaussing is important, but why this shows China’s interests in becoming a full-on blue water Navy.