RedactedNarrative: On May 2, 2020 at approximately 19:30 a vessel driven by Operator 1 was traveling upstream on Nickajack Lake in Marion County, TN.  Operator 1 noticed smoke coming out of the cabin, he went downstairs and found smoke coming from behind the electric panel.  He used a fire extinguisher to try to suppress the fire but was not able to do so.  He then got his phone, keys and wallet and exited the vessel.