Pilots often mention the affordability and social benefits of flying with another time-builder pilot, but I'd love to highlight that it's also safer. NASA conducted a study on the effect on safety of reducing an aircraft's crew from two pilots to one while monitoring the following workload functions:
1. Collision avoidance
2. Navigation
3. Communications
4. Operation and monitoring of aircraft systems
5. Command decisions
The study showed that "even relatively minor nonnormals create notable failure effects and decrements in the ability of the single pilot to recover the aircraft." NASA further concluded that "there were notable flight performance decrements during single-pilot operations compared to two-crew operations that suggest unacceptable, reduced safety margins."
Flying with another time-builder pilot you trust is a step you can take today toward reducing risk.
Check out the study here: https://ntrs.nasa.gov/api/citations/20170009542/downloads/20170009542.pdf
