What does it mean for a crew member to be under supervision during command practice?

When a crew member is under supervision during command practice, it means that they are receiving guidance from a pilot in command. This supervision is critical in a training environment, as it ensures that the trainee has access to the necessary knowledge and expertise required to manage the aircraft safely and effectively. The supervising pilot can provide real-time feedback and assistance, which is especially important during critical phases of flight, or when the trainee is encountering challenging situations. This collaborative approach not only enhances safety but also helps the trainee build the confidence and skills needed to operate the aircraft independently in the future.