Get Your FCC License

If you want to work on aircraft radio, navigation, and communication systems in the United States, you need a General Radiotelephone Operator License (GROL) from the Federal Communications Commission. This is not optional. Federal regulations require that anyone who adjusts, maintains, or internally repairs radio transmitters used in aviation hold an FCC GROL. Employers at airlines, MRO facilities, and avionics shops will ask if you have it, and the ones worth working for will not hire you without it. The good news: the exam is straightforward, the study materials are free, and you can earn this credential before you ever set foot in a formal training program. Getting your GROL early is one of the highest-return moves you can make in your avionics career.

What Exactly Is the GROL?

The General Radiotelephone Operator License is an FCC commercial radio license that authorizes you to install, maintain, and repair radio transmitting equipment at land stations, on ships, and on aircraft. For avionics technicians, the GROL is the credential that legally authorizes you to work on aircraft communication and navigation radios, transponders, radar systems, and other transmitting equipment.

The GROL is governed by 47 CFR Part 13 of the FCC’s rules and has been a requirement in the avionics industry for decades. Unlike the FAA’s A&P certificate, the GROL does not expire and does not require renewal. Once you earn it, it is yours for life.

The Exams

The GROL requires you to pass two written exams, administered in sequence:

Element 1 — Marine Radio Operator Permit (MROP)

• 24 multiple-choice questions
• You must answer at least 18 correctly (75%)
• Covers basic radio law, operating procedures, and fundamental radio theory
• This is a relatively easy exam if you have studied basic electronics

Element 3 — General Radiotelephone

• 100 multiple-choice questions
• You must answer at least 75 correctly (75%)
• Covers electronic fundamentals, electrical circuits, circuit components, practical circuits, signals and emissions, antennas and transmission lines, radio wave propagation, and radio frequency safety
• This is the substantive exam that proves your technical knowledge

When you pass both Element 1 and Element 3, the FCC issues your GROL. There is no practical exam — it is entirely written.

Why Employers Require It

The legal basis is 47 CFR 87.89, which requires that anyone making “internal adjustments or repairs” to aircraft radio transmitting equipment hold at least a GROL. In practice, this covers nearly everything an avionics technician does with communication, navigation, and surveillance systems.

Beyond the legal requirement, the GROL signals to employers that you understand radio frequency (RF) fundamentals — antenna theory, propagation, modulation, and receiver/transmitter architecture. These are the same principles that govern every communication and navigation system on an aircraft, from VHF radios to ADS-B transponders to weather radar.

A job posting for an avionics technician at a major airline or MRO will almost always list “FCC GROL” as either a requirement or a strong preference. Having it before you apply puts you ahead of candidates who plan to “get it later.”

How to Study

The GROL exam questions are drawn from a publicly available question pool. This means you can study every possible question and answer before you sit for the exam. There are no surprise questions. If you study the pool thoroughly, you will pass.

Free Study Resources

FCC Commercial Element Study Guides

The complete question pools for Element 1 and Element 3 are published by the FCC and available through multiple sources:

• ELKINS — offers free online study materials and practice tests for all FCC commercial radio exams. This is one of the most widely used GROL study resources.
• GROL Study Guide at fccgrol.com — free access to the complete question pool with explanations
• W4EEY GROL Resources — curated links to study materials, practice exams, and exam-taking tips

The GROL+RADAR Book

The “GROL+RADAR” study guide by Gordon West (published by Master Publishing) is the most popular printed study resource. It covers Element 1, Element 3, and Element 8 (radar endorsement) with every question from the pool, correct answers highlighted, and brief explanations. It costs approximately $35 to $50 and is available from Amazon and ham radio retailers. If you prefer studying from a physical book, this is the one to get.

YouTube

Search for “FCC GROL study” or “Element 3 study guide” on YouTube. Several instructors have posted complete video walkthroughs of the question pool with explanations of the underlying theory. These are especially helpful if you need the concepts explained rather than just memorized.

Study Strategy

Here is the approach that works:

1. Start with the theory. Before you memorize questions, make sure you understand basic electronics — Ohm’s law, AC/DC circuits, capacitors, inductors, resonant circuits, transistors, and basic radio principles. If you completed Step 1 (Learn Electronics Fundamentals), you already have this foundation.

2. Work through the Element 1 question pool first. It is shorter and easier. Use it to build confidence and get familiar with the FCC’s question style.

3. Study the Element 3 question pool section by section. The pool is organized into subelements covering different topics. Work through one subelement at a time rather than trying to tackle all 100 questions at once.

4. Take practice exams. Once you have studied the full pool, take timed practice exams until you consistently score 85% or higher. Scoring 85% on practice exams gives you a comfortable margin above the 75% passing threshold.

5. Focus on your weak areas. Track which subelements you miss questions in and review those topics until you can answer them correctly without hesitation.

Realistic timeline: If you already have a basic electronics background, plan on 40 to 80 hours of study spread over 4 to 8 weeks. If you are starting from zero in electronics, add another 4 to 6 weeks for foundational study first.

Taking the Exam

Where to Test

FCC commercial radio exams are administered by Commercial Operator License Examination Managers (COLEMs). The two main COLEMs are:

• iNarte/ANSI — find testing locations and schedules at inarte.org
• National Radio Examiners — find testing information at nationalradioexaminers.com

Some COLEMs offer testing at fixed locations on scheduled dates. Others arrange testing by appointment. Testing is available throughout the United States, and some COLEMs offer online proctored exams.

Exam Day Details

• Bring two forms of ID, at least one with a photo (driver’s license, passport, school ID)
• Bring your FCC Registration Number (FRN). You need to register in the FCC’s CORES system at apps.fcc.gov/cores/userLogin.do before your exam. Registration is free.
• No electronics — no phones, tablets, or smart watches in the testing area
• Basic calculator allowed — some locations provide calculators, but bring your own non-programmable scientific calculator to be safe
• No notes or study materials
• Exam fee: approximately $50 to $100 per exam session, paid to the COLEM (not the FCC). Fees vary by testing organization.

You can take Element 1 and Element 3 in the same testing session. Most candidates do this to earn the GROL in a single visit.

After You Pass

When you pass both elements, the COLEM submits your results to the FCC. The FCC processes your license and posts it in the Universal Licensing System (ULS) database, typically within a few business days to two weeks. You can verify your license and download a copy at wireless.fcc.gov/uls.

Your GROL does not expire. There is no renewal, no continuing education requirement, and no periodic retesting. Once issued, the license is valid for your lifetime.

The GMDSS Maintainer Endorsement

Once you have your GROL, you can add the GMDSS (Global Maritime Distress and Safety System) Radio Maintainer endorsement by passing one additional exam:

Element 9 — GMDSS Radio Maintainer

• 50 multiple-choice questions
• 75% passing score (38 correct)
• Covers GMDSS equipment, maintenance procedures, and regulations

The GMDSS maintainer endorsement is primarily relevant to marine radio work, but it adds breadth to your FCC credentials and demonstrates additional RF expertise. Some avionics employers view it as a plus, particularly those that also service marine electronics. If you are already in study mode for the GROL, adding Element 9 requires relatively little additional effort.

The Radar Endorsement

For avionics technicians who will work on aircraft weather radar or ground-based radar systems, the Radar endorsement is another valuable addition:

Element 8 — Ship Radar Techniques

• 50 multiple-choice questions
• 75% passing score (38 correct)
• Covers radar principles, installation, maintenance, and troubleshooting

Despite its name referencing “ship radar,” Element 8 covers radar theory and practice broadly. The principles of pulse radar, Doppler processing, antenna patterns, and waveguide systems are the same whether the radar is on a ship or an aircraft. Many avionics technicians who work on weather radar, TCAS (Traffic Collision Avoidance System), or military radar systems hold this endorsement.

The GROL+RADAR book by Gordon West covers Element 8 alongside the GROL elements, so if you are using that study guide, you already have the material.

Cost Summary

Here is the total cost to earn your GROL:

For under $150, you earn a lifetime credential that is legally required for avionics work and that immediately differentiates you from other candidates. There are very few career investments with a better return.

How the GROL Fits Into Your Career Path

The GROL is not a standalone career credential — it is one piece of the avionics technician qualification stack. Here is how it fits together:

• GROL — legally required to work on aircraft radio transmitting equipment
• FAA A&P certificate — authorizes you to perform and sign off aircraft maintenance (including avionics installations)
• NCATT AET certification — demonstrates avionics system knowledge to employers
• Employer-specific training — airlines and MROs provide type-specific training on their equipment

You do not need all four to get hired, but the more you have, the stronger your position. Many entry-level avionics technicians start with a GROL and either an A&P or an AET, then add the remaining credentials on the job.

What to Do Next

1. Today: Register for an FCC Registration Number (FRN) at apps.fcc.gov/cores/userLogin.do. It takes five minutes and costs nothing.
2. This week: Download the Element 1 and Element 3 question pools from one of the free study resources listed above. Skim through them to understand the scope and format.
3. Over the next 4 to 8 weeks: Study systematically. Work through the question pool section by section, starting with Element 1. Take practice exams weekly to track your progress.
4. When you consistently score 85%+ on practice exams: Schedule your exam with a COLEM near you.
5. Exam day: Take Element 1 and Element 3 in the same session. Walk out with your GROL.

Every avionics technician needs this license. There is no reason to wait until a training program makes you get it. Earn it on your own, on your own schedule, for less than the cost of a textbook. Then walk into your first day of training or your first job interview with a credential that half your competitors do not have yet.