VTS Vessel Traffic Management & Navigation 4 — Questions and Answers
Question 1: What is the correct VHF channel for vessel traffic in most U.S. VTS areas for primary working communications?
- Channel 16
- Channel 22A
- The designated VTS working channel specified in the Notice to Mariners for that area (Correct answer)
- Channel 13
Correct answer: The designated VTS working channel specified in the Notice to Mariners for that area
Each U.S. VTS designates a specific working channel published in Local Notices to Mariners; Channel 16 remains the distress and calling channel, not primary VTS working channel.
Question 2: A LNG carrier is approaching a VTS zone. Compared to a standard cargo vessel, what additional considerations apply?
- LNG carriers require no special considerations beyond standard VTS procedures
- LNG carriers require safety zones, escort requirements, and coordination with local emergency response agencies (Correct answer)
- LNG carriers may bypass VTS reporting requirements due to international treaty
- Only the pilot aboard the LNG carrier manages traffic coordination
Correct answer: LNG carriers require safety zones, escort requirements, and coordination with local emergency response agencies
LNG carriers typically require mandatory escort vessels, exclusion zones, advance coordination with fire and hazmat response, and often special routing plans within VTS areas.
Question 3: What is the purpose of a 'vessel traffic center' (VTC) maintaining a traffic log?
- To bill vessels for VTS services rendered
- To provide a chronological record of communications, vessel movements, and incidents for accountability and post-incident analysis (Correct answer)
- To track pilot license renewal dates
- To satisfy insurance company requirements for port operations
Correct answer: To provide a chronological record of communications, vessel movements, and incidents for accountability and post-incident analysis
The traffic log serves as an official record that enables incident reconstruction, performance review, legal accountability, and training improvement.
Question 4: In reduced visibility conditions, which regulation governs how a vessel must navigate within a VTS zone?
- Only the vessel master's judgment applies in fog
- COLREGS Rule 19 governs vessel conduct in restricted visibility, supplemented by VTS advisories (Correct answer)
- VTS operators assume full navigational control of all vessels in fog
- Vessels must anchor immediately upon visibility dropping below 0.5 nautical miles
Correct answer: COLREGS Rule 19 governs vessel conduct in restricted visibility, supplemented by VTS advisories
COLREGS Rule 19 requires safe speed, readiness to stop, use of radar, and caution in restricted visibility; VTS supplements this with traffic information but does not supersede the COLREGS.
Question 5: What does the term 'traffic separation scheme' (TSS) intend when it designates an 'inshore traffic zone'?
- An area where all vessel traffic is prohibited
- A zone between the TSS and the coast where local small craft and coastal traffic may navigate without using the main traffic lanes (Correct answer)
- A customs inspection area for arriving international vessels
- A restricted zone for naval vessel operations only
Correct answer: A zone between the TSS and the coast where local small craft and coastal traffic may navigate without using the main traffic lanes
Inshore traffic zones allow smaller vessels and coastal traffic to operate without entering the main TSS lanes, reducing conflicts between ocean-going and local traffic.
Question 6: A vessel reports a steering casualty while in a narrow VTS channel with traffic astern. What is the VTS operator's immediate priority?
- Advise the vessel to anchor immediately regardless of depth
- Broadcast a Securite to warn all vessels in the area, coordinate clear space, and notify Coast Guard Sector (Correct answer)
- Contact the vessel owner's representative for instructions
- Wait for the vessel to re-establish steering before taking action
Correct answer: Broadcast a Securite to warn all vessels in the area, coordinate clear space, and notify Coast Guard Sector
Broadcasting a Securite immediately warns all other traffic of the navigational hazard while VTS coordinates with the Coast Guard and works to create safe maneuvering room.
Question 7: What is the significance of a vessel's 'ETA' (Estimated Time of Arrival) to VTS traffic management?
- It is used only for customs and immigration processing
- It allows VTS to sequence arrivals, plan berth availability, coordinate pilot dispatch, and anticipate traffic density (Correct answer)
- It has no operational significance to VTS operations
- It is required only for vessels carrying hazardous cargo
Correct answer: It allows VTS to sequence arrivals, plan berth availability, coordinate pilot dispatch, and anticipate traffic density
ETA is a core planning tool that enables VTS to sequence traffic, coordinate resources, prevent congestion at approaches, and optimize port throughput.
VTS Vessel Traffic Management & Navigation 4
What is the correct VHF channel for vessel traffic in most U.S.
VTS areas for primary working communications?