Drop-citadel
From Warhammer 40k - Lexicanum
Drop-citadels are large mobile bastions used by the Deathwatch, which can use their titanic engines to travel through the air and land wherever they are needed. They contain enhanced divinators, oracle-probes and data-screeds, that are used to discover the location of any hidden Xenos that are near them.[1]
Sources
- 1: Codex: Deathwatch (9th Edition), pg. 17 - The Shield that Slays