3) The purpose of this structure or CST is :
a) To provide external charging of the shuttle to produce charge shield for it
b) The shuttle is a vehicle to transport passengers
c) This CST will charge the shuttle until the shuttle having stable charge shield
d) To release the charge shield shuttle for it to travel at 2,200km/s inside the vacuum tunnel toward its destination
e) To act as receiver to hold the charge shield shuttle after this shuttle reached its destination
f) Then this CST will discharge the shuttle’s charge shield
g) After that the passengers can come out from the shuttle