Hydro Products Asia supply deperming cables to the Naval defence sector. Navies utilise deperming cables in conjunction with degaussing, as a countermeasure against detection.
Heavy gauge deperming cables are wrapped around the hull and structure of a vessel, and very high electrical currents are pulsed through the cables. This has the effect of "resetting" the ship's magnetic signature. Deperming is a procedure for removing the magnetism from submarines and vessels to camouflage them against magnetic detection vessels and enemy marine mines.
By its very nature, a metal-hulled submarine develops a magnetic signature as it travels due to a magneto-mechanical interaction with the Earth's magnetic field. This signature can be exploited by magnetic mines, or facilitate the detection of a submarine by ships or aircraft with magnetic anomaly detection equipment.
Typical features and benefits include:
Countermeasure against detection
Resetting vessels's magnetic signature
Removing magnetism from submarines
Camouflage against magnetic detection vessels and enemy marine mines