degaussing
Speech parts
1. degaussing - Noun
2. degaussing - Verb
Meaning
the process of making a (steel) ship's hull nonmagnetic by producing an opposing magnetic field
Source: WordNetSynonyms
Hypernyms
Examples
A degaussing circuit using a PTC thermistor is simple, reliable (for its simplicity), and inexpensive.
Initially, major warships and large troopships had a copper degaussing coil fitted around the perimeter of the hull, energized by the ship's electrical system whenever in suspected magnetic-mined waters.
Improved degaussing circuits have auxiliary heating elements to heat the thermistor further (and reduce the final current) or timed relays to disconnect the degaussing circuit entirely after it has operated.
In this field the British, with their large seagoing navy, have had the bulk of world experience, and most anti-mine developments, such as degaussing and the double-L sweep were British inventions.
Many of the boats that sailed to Dunkirk were degaussed in a marathon four-day effort by degaussing stations.
The coil and thermistor are intentionally sized so that the current flow will heat the thermistor to the point that the degaussing coil shuts off in under a second.