Sea Mine
From Warhammer 40k - Lexicanum
Sea Mines are mines used by the Imperium to protect landmasses from assault by aquatic naval vessels. They are held in place by anchor lines.[1]
At the start of the Third Armageddon War the Imperium dispersed millions of Sea Mines around the harbour of Phoenix Island. An unknown number of mines now drift freely, threatening civilian shipping after their anchor lines became corroded due to chemical spillage.[1]
