The institution
An office whose distinguishing feature is patience
A privately endowed institution working on problems whose consequences outlive the funding cycles that would normally study them.
How it is arranged
Funded from principal, never from contract
Sentinel Research Group is endowed. It does not take contract research, it does not sell products, and it has no customers. This is a structural choice rather than a moral one: an institution that can be defunded mid-question will, over time, stop asking questions that take a long time to answer.
Work is organised into six Directorates, each responsible for a group of research areas and for the instruments that serve them. Directorate VI — Human Factors — has standing authority to review the operating practice of the other five, which is unusual and occasionally unpopular.
Publication is decided by the Disclosure Board under Protocol Sigma. The Board records who decided, why, and when the decision will next be examined. It has reversed itself seven times since 2009.
The Reversibility Principle
“We do not deploy what we cannot withdraw. Any system we build must be able to be taken back out of the world by the people who put it there.”
The clause was attached to the endowment by our founder in 1974 and has never been amended. It is the reason a substantial minority of our engineering effort goes into shutdown paths, custody and rollback rather than into capability — and the reason four technically sound programmes have been closed rather than fielded.
In the margin beside the clause, in the founder's hand, is written: They will think this is about safety. It is about humility.
Sites
Four places, chosen for awkward reasons
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Site ARGENT
197950°17'N 96°02'W
Primary computation and materials work.
Built into a decommissioned hydroelectric substation. Chosen for the power feed, not the seclusion.
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Station LOWFIELD
198663°44'N 68°31'W
Long-baseline instrumentation and timing reference.
Radio-quiet by geography rather than by agreement. Staffed eleven weeks at a time.
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The Vault at MERIDIAN
197445°25'N 75°42'W
Archive of record and physical custody.
The oldest continuously operated part of the institution. Everything published here has a paper twin there.
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Site HALLOW
200452°08'N 113°51'W
Autonomous systems proving ground.
Nine square kilometres of instrumented prairie. Nothing leaves it under its own power.
Record
Fifty-one years
- 1974
The Continuity Office is established
A two-page memorandum creates an office whose only distinguishing feature is patience. The endowment carries one condition, which the board accepts eleven weeks later.
- 1979
Site ARGENT opens
A decommissioned hydroelectric substation is converted for computation and materials work. Chosen for the power feed rather than the seclusion, whatever visitors assume.
- 1986
Station LOWFIELD is commissioned
Twelve years after first occupation. The delay was the time it took to prove we could keep people there safely through a winter.
- 1991
Renamed SENTINEL
The Continuity Charter is re-issued unchanged. The name changes because the original was consistently misunderstood as a records office.
- 1993
Loss of reference at ARGENT
Nineteen hours of confident wrong time costs eleven months of otherwise good data. The institution's approach to instrument trust dates from this week.
- 2009
Protocol Sigma adopted
A written procedure for publication decisions under uncertainty, with a deliberate thumb on the scale toward release.
- 2023
Reversibility formalised
The founding condition becomes four auditable tests applied by a reviewer who did not build the system.