Definition
In the DECIDE decision-making model, the step in which the pilot deliberately selects one course of action from the alternatives available, based on the information gathered and the consequences considered for each option.
Plain English
After looking at the situation and the options, you pick the one you're going to actually do.
Context Anchor
Seen in aeronautical decision-making when a pilot has recognized a problem or change and must decide what action to take next.
Derivation
From Old English 'ceosan,' meaning 'to select or pick.' In ADM the word is used in its everyday sense, but it is elevated to a formal step — the moment a pilot commits to one option rather than drifting between possibilities.
Why Pilots Care
Many in-flight problems get worse not because the pilot picked the wrong option, but because they never clearly chose one. Treating 'choose' as a deliberate, named step forces a commitment so the next actions can follow cleanly.
Intuition Check
Do not read choose here as a casual preference, like choosing a snack. In this context, choose means making a deliberate safety decision from the available actions.
Example Sentence 1
After estimating the impact of the deteriorating weather, the pilot used the DECIDE model to choose a diversion to the nearest suitable airport.
Example Sentence 2
In the DECIDE process the pilot must choose a response that keeps the flight within safe limits.