This archive tracks four layers. A record present in 1 of them (M41) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Position in this era: [RECORD LOST].
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
Position in this era: [RECORD LOST].
The 41st Millenniumpre-Rift
imperium
Ark Mechanicus of Satzica Secundus
An Ark Mechanicus, the flagship of Fabricator Locum Engra Myrmidex of the forge world Satzica Secundus, over the war for the lost forge world Velchanos Magna. What happens to her is kept off this record because it would spoil the book.
A mobile record: it carries a position timeline rather than a fixed point. The archive places it in 1 of the four eras (M41); each era section above carries that era's entry.
Books set here
1 title in the reading tracker touches this record. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Ark_Mechanicus (read directly in a browser on 2026-10-01): 'Opus Machina — Flagship of Fabricator Locum Engra Myrmidex of Satzica Secundus', citing the novel, 0011, DENTRICA I OF II, +OPUS MACHINA+. https://wh40k.lexicanum.com/wiki/Adeptus_Mechanicus:_Skitarius_(Novel): 'the Ark Mechanicus Opus Machina'. NAME-COLLISION CHECK: Lexicanum's 'Opus_Machina' redirects to Cult_Mechanicus (the doctrine 'Machina Opus'), not to a ship; no index record uses the name.
positionsmedium
derived: Lexicanum's plot summary places the ship with the expeditionary force recovering Velchanos Magna when the Iron Warriors arrive, so she is docked at velchanos-magna for m41. The novel page does not state the orbit in so many words.