Petty Officer First Class
From Starbase 900 Wiki
Petty Officer First Class is the sixth enlisted rate in Starfleet, just above Petty Officer Second Class and below that of Chief Petty Officer and is a non-commission rate.
Petty Officer First Class is the sixth enlisted rate in Starfleet, just above Petty Officer Second Class and below that of Chief Petty Officer and is a non-commission rate.