This archive tracks four layers. A record present in 4 of them (HH, AoI, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
chaos
Flagship of the Warmaster
A Gloriana-class battleship built on Mars and given to Horus; the Heresy is planned, launched and finally ended aboard it. The Emperor killed Horus in its command decks.
Position: Isstvan System (Isstvan III, Isstvan V) In orbit over Isstvan III for the virus bombing, then over Isstvan V for the Drop Site Massacre Cited in Galaxy in Flames
Position: Sol System (Luna, Mars, Terra, Titan) Flagship of the traitor armada at the Siege of Terra; the Emperor boards it at the end Cited in The Solar War
Age of the ImperiumM32–M40
chaos
[RECORD LOST]
[RECORD LOST]
the ship went into the Eye of Terror with the retreating traitor fleets and is not reliably tracked again for millennia.
Position in this era: [RECORD LOST].
The 41st Millenniumpre-Rift
chaos
Flagship of Abaddon and the Black Legion
Recovered from the Eye and given to Abaddon; the 13th Black Crusade is commanded from the same bridge Horus used.
Position: Cadian System (Cadia) Abaddon's command ship at the Fall of Cadia, 999.M41 Cited in The Fall of Cadia
Era Indomituspost-Rift
chaos
Flagship of the Black Legion
Still Abaddon's, and still the single most recognisable hull in the galaxy.
Position: Vigilus System (Vigilus) Abaddon leads the assault on Vigilus and the Nachmund Gauntlet in person
Position
A mobile record: it carries a position timeline rather than a fixed point. The archive places it in 3 of the four eras (HH, M41, IND); each era section above carries that era's entry.
Books set here
14 titles in the reading tracker touch this record, 4 of them as a primary location. Titles link out to the tracker.
DELIBERATELY ABSENT. Every other ship record here names its hull family, but this one must not: the ship is a Gloriana in M31 and the overgrown tyrant flagship of catalogue entry 11 by M41, and a record-level archetype field beats the renderer's era-aware table (ID_ARCH_ERA in app/src/stages/system.js), which already draws it as 'gloriana' for hh and 'tyrant-flagship' for m41/indomitus. Setting one flat value here would silently delete that split. The schema has no era-keyed archetype, so the gap is the honest answer until it does