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100+ Free USCG Mate Rivers 500-1600 Practice Questions

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2026 Statistics

Key Facts: USCG Mate Rivers 500-1600 Exam

RVR03

NMC Exam Code

NMC Examinations

~180

Typical Original Path Questions

Q300+Q391–Q393 module sums

90%

Rules & Chart Plot Pass

USCG Deck Guide / module standards

$95

Exam Fee (Lower Level)

46 CFR 10.219

$240

Typical Original Total Fee

Evaluation + exam + issuance

500–1600

GRT Band (Exam Code)

NMC RVR03

RVR03 Mate Rivers less than 500–1600 GRT is modular. Typical modules: Inland Rules (50 at 90%), Deck General and Safety (70 at 70%), Navigation General Rivers (50 at 70%), Chart Plot (10 at 90%)—about 180 original-path questions. Lower-level original fees are about $100+$95+$45. Service follows 46 CFR 11.459 (corresponding GLI mate service without Great Lakes requirement). This free bank is an English MCQ study aid for mate-level limited-tonnage river service.

Sample USCG Mate Rivers 500-1600 Practice Questions

Try these sample questions to test your USCG Mate Rivers 500-1600 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under Rule 3, two vessels are deemed to be in sight of one another:
A.Whenever each holds the other on radar
B.Whenever they can speak to one another on VHF
C.Only when one can be observed visually from the other
D.Whenever they are within two miles of each other
Explanation: Rule 3 makes visual observation the sole test. Radar contact, an AIS target, or a conversation on the radio does not put vessels in sight of one another. The point matters because the steering and sailing rules of Section II, with their stand-on and give-way roles, apply only to vessels in sight; until then Rule 19 governs and neither vessel stands on.
2Your vessel is fitted with operational radar. Under Inland Rule 7 you must:
A.Rely on the radar picture alone and dispense with visual bearings
B.Use the radar only when visibility falls below two miles
C.Assume that a target not shown on AIS is not a real vessel
D.Carry out long-range scanning for early warning and plot or systematically observe detected objects
Explanation: Rule 7 requires proper use of radar equipment if fitted and operational, including long-range scanning for early warning of risk of collision, and radar plotting or equivalent systematic observation of detected objects.
3Inland Rule 16 states the duty of the give-way vessel. She shall, so far as possible:
A.Sound one prolonged blast before making any alteration
B.Cross ahead of the stand-on vessel so as to clear the situation quickly
C.Take early and substantial action to keep well clear
D.Match the stand-on vessel's speed until the situation resolves
Explanation: Rule 16 requires every vessel directed to keep out of the way of another to take early and substantial action to keep well clear.
4Under Inland Rules on the Western Rivers (and other waters specified by the Secretary), a power-driven vessel proceeding downbound with a following current in a narrow channel:
A.Must always keep clear of every upbound vessel as give-way vessel
B.Has the right-of-way over an upbound vessel, shall propose the manner and place of passage, and shall initiate the maneuvering signals as appropriate
C.Is required to stop engines until the upbound vessel passes
D.Has no special status and applies ordinary head-on rules only
Explanation: Inland Rule 9(a)(ii) and Rule 14(d) give a power-driven vessel downbound with a following current on the Western Rivers (and specified waters) the right-of-way over an upbound vessel; the downbound vessel proposes the manner and place of passage and initiates maneuvering signals as appropriate.
5When two power-driven vessels are meeting on reciprocal or nearly reciprocal courses so as to involve risk of collision under ordinary Inland head-on rules (Rule 14), each shall:
A.Alter course to port and pass starboard to starboard
B.Maintain course and speed without signals
C.Alter course to starboard so that each shall pass on the port side of the other
D.Sound five short blasts and reverse engines immediately
Explanation: Under ordinary Inland Rule 14(a), when two power-driven vessels are meeting head-on with risk of collision, each shall alter course to starboard so as to pass port to port (subject to Western Rivers downbound special rules where they apply).
6Under Inland Rule 34, one short blast by a power-driven vessel generally means:
A.I am altering my course to port
B.I am operating astern propulsion
C.I intend to leave you on my port side (or, as applicable in overtaking, pass on your starboard side)
D.Danger; I do not understand your intentions
Explanation: Under Inland Rule 34 intention/agreement signals, one short blast indicates intent to leave the other vessel on one's own port side (port-to-port meeting or starboard-side overtaking as context requires). International Rules use different meaning for short blasts in many situations.
7Under Inland Rule 34, two short blasts by a power-driven vessel generally means:
A.I intend to leave you on my starboard side (or pass on your port side when overtaking, as context requires)
B.I am altering course to starboard under International Rules only
C.I am at anchor
D.I request a lockage
Explanation: Two short blasts under Inland Rule 34 communicate intent to leave the other on one's starboard side (starboard-to-starboard meeting or port-side overtaking as context requires).
8The danger or doubt signal under Inland Rule 34 is:
A.One prolonged blast
B.Two prolonged blasts
C.At least five short and rapid blasts
D.One short, one prolonged, one short
Explanation: When vessels in sight of one another fail to understand each other's intentions or actions, or when doubt exists, at least five short and rapid blasts on the whistle is the danger/doubt signal.
9In a narrow channel under Inland Rule 9, a vessel of less than 20 meters or a sailing vessel shall not:
A.Use VHF for bridge-to-bridge communications
B.Impede the passage of a vessel which can safely navigate only within the channel or fairway
C.Sound any whistle signals
D.Show navigation lights at night
Explanation: Rule 9 requires that a vessel of less than 20 meters in length or a sailing vessel shall not impede the passage of a vessel which can safely navigate only within a narrow channel or fairway.
10You intend to overtake another power-driven vessel under Inland Rules. One short blast by the overtaking vessel means you intend to:
A.Overtake on the other vessel's port side
B.Overtake on the other vessel's starboard side
C.Stop and reverse
D.Meet head-on port to port only
Explanation: Under Inland Rule 34 overtaking arrangements, one short blast by the overtaking vessel signals intent to overtake on the starboard side of the vessel being overtaken.

About the USCG Mate Rivers 500-1600 Exam

The USCG Mate of Less Than 500–1600 GRT — Rivers examination (NMC exam code RVR03) is the national deck knowledge path for limited-tonnage mate service on rivers under 46 CFR 11.459. Modules cover Inland Rules of the Road (including Western Rivers special provisions), combined deck general and safety, navigation general for rivers, and chart plot.

Assessment

RVR03: Q300 Rules of the Road Inland (50, 90%); Q391 Deck General and Safety (70, 70%); Q392 Navigation General Rivers (50, 70%); Q393 Chart Plot (10, 90%). Q394 is Mate LT 500-1600 GRT Renewal Open Book Exercise (renewal only).

Time Limit

Up to 3.5 hours per module; minimum two modules per day, all modules completed on consecutive days within the same business week

Passing Score

70% most modules; 90% Rules of the Road; 90% chart plot

Exam Fee

$95 examination fee; ~$240 typical original lower-level total ($100 evaluation + $95 exam + $45 issuance) (U.S. Coast Guard National Maritime Center (NMC) / Regional Exam Centers)

USCG Mate Rivers 500-1600 Exam Content Outline

~28%

Rules of the Road Inland

Inland Rules with Western Rivers special provisions for limited-tonnage river mates.

~39%

Deck General and Safety

Mate-of-watch seamanship, operations, safety, and emergency response.

~28%

Navigation General Rivers

River navigation, aids, currents, locks, compass, and piloting.

~6%

Chart Plot

Plotting and calculation problems scored at 90%.

How to Pass the USCG Mate Rivers 500-1600 Exam

What You Need to Know

  • Passing score: 70% most modules; 90% Rules of the Road; 90% chart plot
  • Assessment: RVR03: Q300 Rules of the Road Inland (50, 90%); Q391 Deck General and Safety (70, 70%); Q392 Navigation General Rivers (50, 70%); Q393 Chart Plot (10, 90%). Q394 is Mate LT 500-1600 GRT Renewal Open Book Exercise (renewal only).
  • Time limit: Up to 3.5 hours per module; minimum two modules per day, all modules completed on consecutive days within the same business week
  • Exam fee: $95 examination fee; ~$240 typical original lower-level total ($100 evaluation + $95 exam + $45 issuance)

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

USCG Mate Rivers 500-1600 Study Tips from Top Performers

1Overprepare for Inland Rules of the Road because Q300 requires 90% to pass.
2Master Western Rivers/Inland special rules: downbound privilege, river-crossing duties, and Inland Rule 34 intention/agreement signals.
3Drill lights and shapes for power-driven vessels, towing vessels, and barges—core river traffic pictures.
4Practice lock procedures, current effects on tows, and bank/channel awareness for Navigation General Rivers.
5Drill chart-plot routines: speed-time-distance, set and drift, and compass error arithmetic until automatic.
6Take timed sets of 50–70 questions to match REC deck and navigation module length.
7Review stability, damage control, firefighting, and abandon-ship procedures for the combined deck module.
8Study barge and tow seamanship, line handling, and watchkeeping for limited-tonnage river mate duties.
9Confirm your application path is RVR03 (rivers) rather than GLI04 (Great Lakes and Inland) so you prepare the correct nav module.
10Know that Q394 is renewal open book only—do not confuse it with original-module prep.

Frequently Asked Questions

How many questions are on the USCG RVR03 exam?

RVR03 is modular for Mate less than 500–1600 GRT on rivers. Typical original modules: Rules of the Road Inland (50), Deck General and Safety (70), Navigation General Rivers (50), and Chart Plot (10)—about 180 questions total. Q394 is a renewal open-book exercise, not part of the original knowledge path.

What passing score do I need?

Most modules require 70%. Rules of the Road Inland (Q300) requires 90%. Chart plot (Q393) requires 90%.

How much does the exam cost?

Under 46 CFR 10.219, a typical original lower-level officer path is about $100 evaluation, $95 examination, and $45 issuance. Medical, drug testing, and training costs are separate. Pay via Pay.gov.

Can I take the exam remotely?

No. These deck officer modules are administered in person at U.S. Coast Guard Regional Exam Centers (RECs). There is no approved remote-testing option for these endorsements.

How does Mate Rivers 500–1600 service compare to Great Lakes and inland mate?

Under 46 CFR 11.459(b), Mate of river self-propelled vessels with a limitation of 25 to 1,600 GRT must meet the same service requirements as the corresponding tonnage Great Lakes and inland self-propelled endorsement. Service on the Great Lakes is not required for rivers endorsements.

Are open-book renewal exercises the same as the original modules?

No. Q394 Mate LT 500-1600 GRT Renewal Open Book Exercise is separate from original RVR03 knowledge modules (Q300, Q391–Q393). This bank focuses on original-module knowledge.

What calculator can I bring?

The NMC policy letter of December 2, 2024 superseded the earlier TI-30XIIS-only rule. At a Regional Exam Center you may use a programmable calculator with memory if all programs and memory are cleared before entry and you can demonstrate clearing with the manufacturer's instructions. If the examiner cannot confirm the device is cleared, a TI-30XIIS is provided instead. Only one calculator is allowed; other electronics including smart watches are not permitted.

Is this free practice bank an official Coast Guard exam?

No. This is an English-language multiple-choice study adaptation for exam prep. Official modules are administered by the Coast Guard at RECs and may include chart-plot and calculation items that this bank approximates with knowledge and calculation MCQs.