軍艦與商船最大不同處，除了安裝配置各類雷達、飛彈等武器系統裝備，另一項就是面對嚴苛作戰環境時的存活能力遠優於商船。這些能力包含彈片防護、電磁脈衝防護、核生化防護、抗爆震防護、紅外線訊跡匿蹤、雷達訊跡匿蹤、聲訊跡匿蹤及磁訊跡匿蹤等。然而前述各項訊跡基於先天物理特性一定會存在，必須要花費代價去處理，才能獲得相對應的抑制效果，降低敵方偵測到我方的機率，以提高戰場存活率。本文針對磁訊跡進行通盤介紹，首先分析產生艦艇磁訊跡的原因，接著說明磁訊跡管理邏輯，最後介紹艦艇消磁與整磁實務技術。

Infrared, radar, acoustic, and magnetic stealth are critical for warships to reduce the probability of detection by enemies. Signatures of the aforementioned type exist on the basis of innate physical characteristics, and they must be processed at a cost to obtain a corresponding suppression effect and improve a battleship’s rate of survival on the battlefield. This paper introduces the concept of a magnetic signature and presents an analysis of the reasons for the generation of a ship’s magnetic signature. It then explains magnetic signature management and finally introduces the technology used for ship degaussing and magnetization.