CONTAINMENT · CONTROLLED DOCUMENT
AE-SOP-0204 — Restricted-Tier Holding Access (Abyssal)
To control all physical access to Abyssal Holding and the pressure-cascade systems that protect Restricted-tier assets. The procedure guarantees that the inward pressure gradient is never lost, that no person enters alone, and that nothing — instrument, sample, or imagery — leaves the wing without Admiralty sign-off, because a single breach of containment or custody here cannot be undone.
ActiveContainmentRev F
1. Purpose
To control all physical access to Abyssal Holding and the pressure-cascade systems that protect Restricted-tier assets. The procedure guarantees that the inward pressure gradient is never lost, that no person enters alone, and that nothing — instrument, sample, or imagery — leaves the wing without Admiralty sign-off, because a single breach of containment or custody here cannot be undone.
2. Scope
The Abyssal Holding wing; Restricted clearance personnel only.
- In scope: Entry authorisation, two-person discipline, pressure-cascade verification, and controlled egress of materials.
- Out of scope: Life-support failure response in cold-water general holding, which follows AE-SOP-0211; registry handling of Restricted records, which follows AE-SOP-0220.
3. Definitions
| Term | Definition |
|---|---|
| Pressure Cascade | The staged series of pressure differentials that maintains an inward gradient toward the most restricted cells. |
| Inward Gradient | The condition where pressure decreases toward containment, so any leak flows inward, never out. |
| Two-Person Rule | The absolute requirement that no individual enters or operates in the wing alone. |
| Restricted Asset | Any specimen or material whose existence or disposition is Admiralty-controlled. |
4. Responsibilities
| Role | Responsibility |
|---|---|
| Fleet Admiralty (Owner) | Sole authority over asset disposition and egress sign-off; never delegated. |
| Wing Access Officer | Verifies clearance and two-person discipline at the threshold; logs every entry and exit. |
| Engineering Dept. | Maintains and verifies the pressure-cascade systems and differential instrumentation. |
| NEREID | Monitors cascade differentials in real time and triggers seal-and-abort on any below-spec reading. |
5. Pressure-Cascade Differential Limits
| Cascade Stage | Nominal Differential | Abort Threshold | Response |
|---|---|---|---|
| Outer airlock | −15 Pa inward | < −8 Pa | Hold entry, re-stabilise |
| Transfer corridor | −40 Pa inward | < −25 Pa | Seal, abort approach |
| Restricted cell line | −80 Pa inward | < −55 Pa | Full seal, Admiralty notify |
| Containment core | −120 Pa inward | < −90 Pa | Lockdown, no entry |
Note. Any reading below spec at any stage aborts and seals immediately; the gradient is never knowingly traversed against specification.
6. Materials & Equipment
- Restricted-clearance credentials and two-person authorisation pair
- Pressure-cascade differential readout at every stage
- Sealed airlock and corridor interlocks
- Egress manifest and Admiralty sign-off block
- Independent emergency seal controls
- Calibrated differential gauges with current certification
7. Procedure
7.1 Authorisation
- Confirm Restricted clearance for both members of the entry pair.
- No solo entry — the two-person rule is absolute.
- Log the entry against the wing access record before approach.
7.2 Approach
- Verify pressure-cascade differential within specification at each stage before proceeding.
- Maintain the inward gradient at all times.
- Any reading below spec aborts and seals; do not traverse against specification.
7.3 Egress & Disposition
- No instrument, sample, or imagery leaves the wing without Admiralty sign-off.
- Record every egressed item on the manifest.
- Disposition of any asset is Fleet Admiralty authority only — never delegated.
8. Records
- Wing entry/exit log with two-person pairing (retained 10 years)
- Pressure-cascade differential trace per access
- Egress manifest with Admiralty sign-off
- Abort-and-seal event log
- Differential-gauge calibration certificates
9. References
- AE-SOP-0211 — Cold-Water Life-Support Failure Response
- AE-SOP-0220 — Universal Marine Registry Curation
- AE-MET-037 — Abyssal Containment Integrity
- AE-MET-036 — Sensor Mesh Coverage
10. Revision History
| Rev | Date | Author | Summary |
|---|---|---|---|
| A–C | 2084–2086 | Fleet Admiralty | Initial issue; two-person rule and basic cascade verification established. |
| D–E | 2087–2089 | Fleet Admiralty | Staged differential limits and NEREID real-time monitoring added. |
| F | 2090-01-30 | Fleet Admiralty | Egress manifest and per-stage abort thresholds formalised. |