Use 1 Super Elite Potential as Planesman, class him normaly.

You can use 15/14/13pot with12/11rep and 11/10 rest and delay class him, sonar cap is very low.

He need to stay support sailor many levels then class him as sonarman, i cant remember right now how long exactly, search on forum or ask the discord community.

The goal is to get the max rep/rest out of that sonarman and hit the sonar cap.