VTS Cheat Sheet 2026

The 30 highest-yield VTS facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the primary purpose of post-incident debriefing conducted by VTS following a major emergency? → To identify lessons learned and improve emergency procedures for future incidents
2. What does VTS use to monitor vessel movements? → Radar, AIS, and communication systems.
3. What is the primary purpose of a VTS 'traffic image'? → To maintain a comprehensive picture of all vessel movements in the VTS area
4. A vessel operator who fails to comply with a VTS instruction in US waters may be subject to penalties under which statute? → The Ports and Waterways Safety Act (PWSA)
5. Under 33 CFR 161.16, what information must be included in a position report submitted to VTS? → Vessel name, call sign, position, course, speed, and any safety-related information
6. During an emergency, a VTS operator receives conflicting instructions from the Captain of the Port (COTP) and the VTS Area Supervisor. The operator should: → Follow the COTP's instructions, as the COTP has paramount authority in the port
7. What is the role of a VTS operator? → To ensure safety by coordinating vessel movements.
8. A vessel reports it is 'standing by on Channel 16.' What does this mean for the VTS operator? → The vessel is monitoring Channel 16 and can be reached there
9. A VTS operator issues a traffic organization instruction to a vessel to delay departure. The vessel master disagrees. Under US regulations, the master must: → Comply with the instruction unless doing so would endanger the vessel or persons aboard
10. A foreign vessel entering a US VTS area is subject to US VTS regulations. This authority is based on the principle of: → Port state jurisdiction over vessels in internal waters and territorial sea
11. What is the primary purpose of conducting post-incident analysis after a VTS safety event? → To identify contributing factors, improve procedures, and prevent recurrence
12. What is the purpose of a VTS contingency plan's 'fallback position' for communications equipment? → To ensure continuity of VTS services if primary systems fail
13. Under the National Environmental Policy Act (NEPA), when must VTS-related infrastructure changes undergo an Environmental Impact Statement (EIS)? → When the action may significantly affect the quality of the human environment
14. What is the PRIMARY purpose of obtaining VTS certification in Vessel Traffic Services Operator Exam? → To demonstrate verified competency and adherence to professional standards
15. What does AIS stand for in the context of vessel traffic management? → Automated Identification System
16. What is the purpose of an Electronic Chart Display and Information System (ECDIS) in a VTS center? → To display digital nautical charts integrated with sensor data such as AIS, radar, and GPS
17. A VTS operator notices a radar target has no associated AIS return. What is the MOST likely explanation? → The vessel is not AIS-equipped or its transponder is off
18. Which AIS message type is used to broadcast safety-related text messages to vessels? → Message 14
19. How often should VTS compliance training be conducted? → At regular intervals as required by regulations
20. Which chart datum is most commonly used in U.S. coastal navigation and VTS charting? → Mean Lower Low Water (MLLW)
21. What is the PRIMARY purpose of obtaining VTS certification in Vessel Traffic Services Operator Exam? → To demonstrate verified competency and adherence to professional standards
22. During a hazardous material spill, VTS establishes a safety zone. What is the correct procedure for vessels needing to transit through the safety zone? → Vessels must receive explicit VTS authorization before entering the safety zone
23. What information is typically included in a VTS vessel movement report upon departure? → Vessel name, destination, ETA, draft, and any special characteristics
24. A vessel reports its ETA as '1430 local.' How should the VTS operator record this to avoid ambiguity? → 1430L or convert to UTC and note the zone
25. Under IALA guidelines, what minimum meteorological visibility typically triggers VTS-imposed navigation restrictions in a port approach channel? → 1 nautical mile
26. A vessel reports a hazardous material spill in the harbor. Which agency must a VTS operator notify in addition to the Coast Guard? → Environmental Protection Agency (EPA) National Response Center
27. What action should a VTS operator take when a vessel fails to acknowledge a mandatory report obligation? → Initiate contact attempts on the designated working channel and log all attempts
28. Under 33 CFR Part 161, what is the primary responsibility of a VTS operator during a navigational incident? → Provide timely, accurate traffic information to assist vessel operators
29. Which regulation governs ballast water management to prevent introduction of invasive species in U.S. waters? → 33 CFR Part 151
30. What is the primary purpose of a VHF Direction Finding (VHF/DF) system in a VTS center? → To determine the bearing of a transmitting vessel