VTS Navigation Systems 2

Question 1

What does AIS stand for in the context of vessel traffic management?

Accepted Answer

Automated Identification System

Answer

AIS (Automated Identification System) transmits vessel identity, position, course, and speed to other ships and VTS centers.

Question 2

A vessel reports its position as 'at anchor in the anchorage.' On radar, the VTS operator notices the vessel is slowly drifting. What is the most likely cause?

Accepted Answer

The vessel is dragging anchor

Answer

A vessel at anchor that shows movement on radar is most likely dragging its anchor, which requires immediate VTS action.

Question 3

Which AIS message type is used to broadcast safety-related text messages to vessels?

Accepted Answer

Message 14

Answer

AIS Message Type 14 is the Safety Related Broadcast Message used to transmit text-based safety information to all vessels.

Question 4

What is the primary purpose of a VHF Direction Finding (VHF/DF) system in a VTS center?

Accepted Answer

To determine the bearing of a transmitting vessel

Answer

VHF/DF enables the VTS operator to determine the compass bearing from which a VHF transmission is originating, helping to locate vessels.

Question 5

On a radar display, what does a vessel's 'trail' or 'tail' indicate?

Accepted Answer

The vessel's recent track history

Answer

A radar trail or tail shows the recent path a vessel has traveled, helping the operator assess its course and speed over time.

(VTS) Vessel Traffic Services Operator Exam Practice Test

(VTS) Vessel Traffic Services Operator Exam Practice Test

VTS Navigation Systems 2