When should the co-pilot call "minimums"?

The co-pilot should call "minimums" during a non-precision approach. In non-precision approaches, minimums refer to the minimum altitude that the aircraft must reach before the pilot decides to either continue the approach or perform a missed approach. This call helps the crew maintain awareness of the current altitude relative to the decision height, which is a critical moment in the approach procedure. By calling "minimums," the co-pilot assists in ensuring that all team members are prepared to either land if the visual references are clear or to execute a missed approach if they are not, which is vital for maintaining safety during the approach phase.