What depth should unpressurized aircraft ideally fly at when transporting a patient?

When transporting a patient, unpressurized aircraft should ideally fly below 1,000 feet. This altitude is chosen specifically to minimize the risk of altitude sickness or other complications that can arise from lower cabin pressure. At altitudes above 1,000 feet, the oxygen levels can become insufficient for individuals who may be in a weakened state or have medical conditions that require stable atmospheric conditions.

Additionally, flying at this lower altitude allows for a quicker response to emergencies and facilitates better monitoring of the patient, as well as providing a more stable flight environment. While options that suggest flying below 500 feet or below 2,000 feet have their merits, the 1,000-foot level strikes the right balance for patient safety and logistical considerations in medical transport scenarios.