Using a Failing Instrument
to Detect Its Own Failure

The other situational awareness behaviours — assessing the state of the aircraft accurately, anticipating what could happen, thinking ahead and providing timely warning — all involve applying awareness that is functioning. This one is different. Recognises and responds to indications of reduced situational awareness in self and others asks you to detect a degradation in a system while you are relying on that system to make the detection. It is the most demanding SA behaviour precisely because the conditions that make it necessary are the conditions that make it hardest.

Understanding why it is hard is the starting point. SA does not normally collapse. It erodes. Frame by frame, increment by increment, each step small enough to pass unnoticed at the time. The picture you are building of the operation falls progressively further behind the actual state of the operation — and because the drift is gradual, there is no single moment where the alarm sounds. There is only the accumulation of small divergences, until the gap between the picture in your head and the reality in front of you is large enough to produce consequences.

By the time that gap becomes obvious — when events are running ahead of your ability to manage them, when decisions that should be straightforward have become effortful, when the pieces no longer fit together the way they should — you are already significantly behind. The question is what came before that moment. And whether anything in what came before could have been read as a warning.

Spotting It in Your Colleague

The asymmetry is real and operationally significant. Detecting reduced SA in your colleague is genuinely easier than detecting it in yourself — because you are watching from outside the degrading picture. You still have access to the full situational model. They do not. And the gap between their behaviour and what the situation actually requires is visible to you in a way that it cannot be to them.

The observable signals are worth knowing. SOP callouts that are missed or late — not because of distraction but because the mental model that would prompt them has fallen behind. Radio calls not made at the expected point. Responses to your communications that arrive with unusual delay, or that answer a slightly different question from the one you asked. Actions taken out of the expected sequence. A colleague who has gone quieter than their normal baseline — not the comfortable quiet of an experienced pilot working efficiently, but the flat quiet of someone whose processing has begun to narrow.

None of these signals is individually conclusive. All of them are worth attending to. The pattern matters more than any single instance. One missed call is a momentary lapse. A sequence of small inconsistencies across the same phase of flight is something different.

Spotting It in Yourself

This is where it becomes genuinely difficult. The signals that indicate your own SA is degrading are internal, easy to rationalise, and arrive in conditions where your capacity for honest self-assessment is already reduced. You are not watching from the outside. You are inside the degrading picture, trying to use diminished awareness to detect its own diminishment.

But the signals are there, if you know what to look for. A feeling of unease that does not attach clearly to any specific concern — the sense that something is not quite right without being able to identify what. A feeling that something has not been completed, without being able to say with certainty what it was. The mental equivalent of checking your pocket for something and not being sure whether you found it or not.

The feeling that events are starting to overtake you. That the pace of the operation has shifted slightly beyond your comfortable management of it. That decisions which would normally be straightforward are requiring more effort than they should. That you are working harder for the same outputs — and noticing that you are.

The physical tells. Everyone has one. The scratch of the head. The longer-than-normal pause before a response. The slight forward lean in the seat. The repeated glance at an instrument that should not need repeated checking. You may not be consciously aware of your tell. But your colleagues often are. And you can learn to become aware of it yourself — which is one of the most practically useful things self-awareness in this behaviour can deliver.

Wanting More Time Is the Signal

There is a particular feeling that precedes many SA breakdowns, and it is worth naming directly. It is the feeling of wanting more time. Not the general wish that a flight were less demanding, but the specific sense that the current pace of events does not allow enough space to properly process what is happening. That decisions are being made faster than you are comfortable with. That the window between receiving information and needing to act on it has closed to a point where genuine consideration is no longer possible.

Feeling cornered. Feeling that options are narrowing. Making decisions that feel rushed rather than considered. These are not simply workload signals — they are SA signals. They indicate that the mental model is no longer keeping pace with the operation, and that the decisions being made are being made from an incomplete or outdated picture.

The correct response — which is much easier to describe than to execute — is to stop and rebuild. To call for time explicitly. To resist the impulse to push through and instead create the space, however briefly, to re-establish where things actually are before continuing. A crew member who can recognise this feeling as the SA signal it is, and act on it before the gap becomes critical, has done something genuinely difficult and genuinely important.

The Response That Matters

Recognition without response is not the behaviour. The second half of it is equally important — and equally demanding, because acting on a recognised degradation requires a degree of professional honesty that not everyone finds easy. Telling your colleague that you have lost the picture. Asking to slow down. Requesting a full stop-and-confirm of where the flight currently is. These are not admissions of incompetence. They are expressions of exactly the self-awareness and professional integrity that the behaviour requires.

For a colleague whose reduced SA you have detected, the response is the same one that any observed anomaly demands: address it before it compounds. A direct question. A check that confirms shared understanding. An offer to take the workload while they re-establish. The key is to act while the gap is still recoverable — not to wait until the evidence is so overwhelming that acting on it is no longer the right frame for what needs to happen.