The uniform says First Officer. The training says you're a Captain who hasn't been given the left seat yet.
In a modern airline cockpit, both pilots are qualified to fly the aircraft. The difference isn't skill. It's experience and seniority.
The First Officer spends years in the right seat, building hours under the line. The same routes. The same procedures. The same decisions. When the situation calls for it, they take control. Most passengers never notice.
The path to command isn't just time. It involves a command course: intensive training that challenges everything a pilot thought they knew. Not because the flying is harder, but because the responsibility is different. Everything that goes wrong is your call. Your crew. Your 180 passengers. You make the decision.
Some First Officers reach command in three years. Some take a decade. The difference isn't flying ability. It's the accumulation of the confidence that command requires. The kind that isn't taught. Only earned.
Airlines don't upgrade pilots who can fly well. They upgrade pilots who are ready to lead.
Every Captain you've ever flown with sat in the right seat first, watching someone else make the calls, filing it away until the day it was their turn.