Taikonaut Ye Guangu’s video log of the third day of the extended exploration phase of ESA’s underground training course CAVES.

Six astronauts from China, Japan, USA, Spain and Russia – calling themselves “team Luca libre” – are spending six nights in caves of Sardinia, Italy, to explore the depths and train for life in outer space.

Guangfu is a Chinese astronaut and the team’s survey and data engineer. In this video log he discusses the day’s exploration and the similarities between moving in caves and spacewalks. He shows the surveying equipment and how to use it as well as detailing the scientific programme in general.

CAVES – Cooperative Adventure for Valuing and Exercising human behaviour and performance Skills – focuses on multicultural approaches to leadership, following orders, teamwork and decision-making. At the end of the course the astronauts will have a better understanding of how they function in a multicultural team and what they are skilled at, as well as areas for self-improvement.

Follow the underground adventure on Twitter with via @ESA_CAVES, and on the CAVES blog.