Failing to recognize need to divert

The hardest part of a diversion isn't flying it — it's admitting you need one while there's still time to make it easy.

The bias that kills

Plan-continuation bias — the everyday name is get-there-itis — is the pull to finish the plan you started even as the reasons to stop pile up. It's powered by sunk cost: "we're eighty percent there, turning around wastes all that." That reasoning is exactly backwards. The fuel and time already spent are gone either way; only the remaining flight is still yours to decide, and you should decide it on the conditions ahead, not the miles behind.

The pull is strongest near the destination, late in the day, and when someone's waiting — precisely the conditions where pressing on is most tempting and least wise. The hazardous-attitude cousins are invulnerability ("it'll work out") and machismo ("I can make it"). A useful gut check: what would I tell a friend who described this exact situation to me? The answer is usually "divert," and usually sooner than you'd admit for yourself.

The accident reports read the same way again and again: a pilot a half-hour from home, weather going down or fuel getting low, who pressed on past two or three perfectly good airports because stopping felt like quitting. The airplane ran out of options before the pilot ran out of optimism. The diversion was available the entire time — the failure was never aerodynamic, it was the refusal to choose it.

Part of the skill is noticing the pull in yourself: the bargaining ("just ten more miles and then I'll decide"), the selective optimism (seizing on the one favorable trend and ignoring three bad ones), the quiet tightening in your gut that you keep talking yourself out of. Those feelings are the trigger — treat them as data, not as noise to override.

Pre-setting the triggers

You can't out-willpower get-there-itis in the moment, so you take the decision out of the moment entirely. Decide on the ground:

• A fuel number you will not go below.
• A ceiling and visibility you will not push under.
• A time past which you will land regardless.

When the airplane reaches one of those, the decision is already made — you're just executing it, not negotiating with yourself at 4,500 feet.

It also helps to name the external pressures in advance — the meeting you'll miss, the antsy passenger, the "I promised I'd be home by six." They're real, but none of them belong in the cockpit weighing fuel against weather, and naming them out loud is how you keep them out of the decision when the moment comes.

This is the same early-recognition discipline that shows up in VI.A.R2 (catching general disorientation) and as the trigger to start the lost procedure in VI.D. Three distinct moments, one shared habit: act on the trigger, don't bargain with it.