A self-contained marine propulsion device is disposed within a container, or pod, that is removably attachable to an undersurface of a deck of a pontoon boat. The process next involves forming a second pole piece having a first region remote from the air bearing surface and a second region extending from the first region toward the air bearing surface. The screen is illuminated with light from a light source comprising an array of controllable light-emitters. The NFC tag of the electronic device is stored in the electronic phonebook of the mobile telephone. In some aspects, the method may include pretreating the biomass with a chemical before introducing the biomass to the chamber andor after transferring shocked biomass from the chamber.