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GROL Study Guide 2026

Everything you need to pass the GROL exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 GROL Exam Format at a Glance

100
Questions
120 min
Time Limit
75%
Passing Score
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📚 GROL Topics to Study (69)

Basic Radio Law and Operating · 11 cardsGeneral Radiotelephone · 11 cardsAmplifier and Oscillator Circuits · 7 cardsAmplifier and Oscillator Circuits · 7 cardsAmplifier and Oscillator Circuits · 7 cardsAmplifier and Oscillator Circuits · 7 cardsAntennas and Transmission Lines · 7 cardsAntennas and Transmission Lines · 7 cardsAntennas and Transmission Lines · 7 cardsAntennas and Transmission Lines · 7 cardsBasic Radio Law and Operating · 7 cardsBasic Radio Law and Operating · 7 cardsBasic Radio Law and Operating · 7 cardsBasic Radio Law and Operating · 7 cardsDigital Logic and Microcomputers · 7 cardsDigital Logic and Microcomputers · 7 cardsDigital Logic and Microcomputers · 7 cardsDigital Logic and Microcomputers · 7 cardsElectrical Principles and Units · 7 cardsElectrical Principles and Units · 7 cardsElectrical Principles and Units · 7 cardsElectrical Principles and Units · 7 cardsGeneral Radiotelephone · 7 cardsGeneral Radiotelephone · 7 cardsGeneral Radiotelephone · 7 cardsGeneral Radiotelephone · 7 cardsMarine Electronics and Radar Systems · 7 cardsMarine Electronics and Radar Systems · 7 cardsMarine Electronics and Radar Systems · 7 cardsModulation and Signal Types · 7 cards
See all 69 topics as flashcards →

✍️ Sample GROL Questions & Answers

1. How may a ship station identify itself during routine radiotelephone communications?
✓ By the vessel's name or its assigned call sign

FCC Part 80 rules allow a ship station to identify using either the vessel's name or its FCC-assigned call sign.

2. Selectivity in a receiver refers to its ability to:
✓ Discriminate between the desired signal and closely spaced interfering signals on adjacent frequencies

Selectivity is determined by the bandwidth and shape factor of IF filters; high selectivity allows the receiver to reject strong adjacent-channel interferers.

3. Which type of filter would be most appropriate for attenuating harmonic emissions from a transmitter final amplifier?
✓ Low-pass filter

A low-pass filter installed at the transmitter output passes the fundamental frequency while attenuating harmonics, which are higher in frequency.

4. Neutralization of an RF amplifier stage is performed to:
✓ Cancel unwanted feedback caused by the transistor's internal collector-base capacitance

At high frequencies, the transistor's internal capacitance feeds energy back from output to input; neutralization applies equal and opposite feedback to cancel this effect and prevent oscillation.

5. After establishing contact on Channel 16, vessels engaged in routine communications should:
✓ Switch to an appropriate working channel

Channel 16 is used for initial contact and distress only; routine communications must be conducted on designated working channels.

6. What is the maximum allowed transmitter power for a ship VHF station on most channels?
✓ 25 watts

Ship VHF stations are generally limited to 25 watts on most channels, with a minimum of 1 watt required on Channel 16.

🎯 Free GROL Practice Tests

Basic Radio Law and Operating · 11 questionsGeneral Radiotelephone · 11 questionsElectrical Principles and Units · 7 questionsAmplifier and Oscillator Circuits · 7 questionsAmplifier and Oscillator Circuits · 7 questionsAmplifier and Oscillator Circuits · 7 questionsGeneral Radiotelephone · 7 questionsAmplifier and Oscillator Circuits · 7 questionsGeneral Radiotelephone · 7 questionsElectrical Principles and Units · 7 questions

📖 GROL Guides & Articles

Your GROL Study Path
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