The level a boarding party walks, forward to aft, and the only one canon describes.
- AM-01 Outer airlock Fr 6–22 published Bergen Limit, chapters 6 and 7 — 'the Ardent Margin's outer airlock cycled to the Pedersen's extraction-protocol clearance'
Cycles in about three minutes: opened 08:24, closed 08:27 with three people inside. The dock-side approach protocol is observed at the threshold.
- AM-02 Inner hatch Fr 22–30 published Bergen Limit, chapter 7 — 'Henrik met Bjørg at the inner hatch'
Where the ship's own people meet whoever has come aboard. A bulkhead to lean on.
- AM-03 Galley Fr 30–54 published Bergen Limit, chapter 7 — 'the galley was where Mei-Lin's would have been: second compartment forward, port side'
⭐⭐ THE ONE FULLY-STATED POSITION IN THE SHIP, and it is stated by comparison: second compartment forward, port side, exactly where her sister's is. Warmer than the companionway. Marek brought the panel up for the meal, and the crew ate there six weeks into conserved rations.
- AM-04 Crew cabins Fr 30–78 published Bergen Limit, chapter 7 — 'Cabin power down to emergency within six hours'
Cabin power is a distinct circuit from the emergency lighting, and it was the first thing lost.
- AM-05 Main companionway Fr 30–190 published Bergen Limit, chapter 7 — 'Henrik led the way down the main companionway'
The spine of the walk. Held at dim emergency lighting for six weeks; deck plates cold under the boot, and the ambient hum absent — the still feel of a ship that has stopped being a ship for long enough that her crew have learned to walk her without the cues a working ship gives.
- AM-06 Medical bay Fr 78–100 published Bergen Limit, chapter 7 — 'Brahimi needs the medical-bay observation berth at the seventy-two-hour window'
Carries at least one observation berth, and it is the reason one casualty transfers to the Pedersen that evening rather than taking a temporary berth.
- AM-07 Load bay Fr 100–190 published Bergen Limit, chapter 7 — the load-bay named among the dockside positions
One of the three places her people are accounted for during the layover: at the slip, at the load-bay, at the dockside.
- AM-08 Auxiliary stack Fr 190–226 published Bergen Limit, chapter 7 — 'auxiliary-stack failure on the twenty-eighth of April'
⚠ THE CASUALTY. Failed on 28 April 2155; cabin power was down to emergency within six hours. Everything else on this sheet is a consequence of this compartment.
- AM-09 Machinery and array spaces Fr 226–280 derived Sister hull arrangement; no Margin-specific description
⚠ Not described aboard the Margin. Placed from the sister hull, because that is what the book says she is.