I fail to see the logic of your deductions being made
I never saw a request for the summoning of a 2nd Class navigator either
Page 15
I must not fear. Fear is the mind killer. Fear is the little death that brings total oblivion.I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see it's path. Where the fear has gone there will be nothing, Only I will remain.
Dune.