Editing Degaussing (section)

===Degaussing range===
The effectiveness of ships' degaussing was monitored by shore-based ''degaussing ranges'' (or ''degaussing stations, magnetic ranges'') installed beside shipping channels outside ports. The vessel under test passed at a steady speed over loops on the seabed that were monitored from buildings on the shore. The installation was used both to establish the magnetic characteristics of a hull to establish the correct value of degaussing equipment to be installed, or as a "spot check" on vessels to confirm that degaussing equipment was performing correctly. Some stations had active coils that provided magnetic treatment, offering to un-equipped ships some limited protection against future encounters with magnetic mines.<ref>{{cite book |title=Shipboard Electrical Systems |date=1962 |publisher=[[Bureau of Naval Personnel]] |location=Washington DC |page=240 |edition=1966|oclc= 2164435}}</ref>