Developer's DescriptionBy Marianas GPS, LLCAn FCC GROL license is an excellent credential for career advancement because it's proof of a certain level of electronics know-how.An FCC GROL license is an excellent credential for career advancement because it's proof of a certain level of electronics know-how. Because it is a federal examination, the FCC GROL license with its implied knowledge is accepted by industry nationwide. The most common addition to Elements 1 and 3 is Element 8, Ship Radar Endorsement. This allows you to operate and repair Maritime Communications equipment in addition to other commercial communications.