VTS Equipment and Technology 3

Question 1

What is the standard VHF working channel used by U.S. Coast Guard VTS for port operations communications?

Accepted Answer

Channel 14

Answer

VTS working channels vary by port, but Channel 14 is commonly designated as a VTS working channel in many U.S. ports, while 16 is the distress/calling channel.

Question 2

An Electronic Chart Display and Information System (ECDIS) in a VTS center uses which type of chart data as its primary format?

Accepted Answer

Electronic Navigational Charts (ENC) in S-57 format

Answer

ENCs in IHO S-57 format are the official vector chart format used by ECDIS, providing object-based data that supports automated alerts and overlays.

Question 3

In VTS operations, what does the term 'ARPA' refer to?

Accepted Answer

Automatic Radar Plotting Aid — a system that tracks targets and calculates CPA/TCPA

Answer

ARPA (Automatic Radar Plotting Aid) automatically tracks radar targets and calculates closest point of approach (CPA) and time to CPA (TCPA).

Question 4

A VTS operator's AIS display shows a vessel with navigational status '1'. What does this indicate?

Accepted Answer

At anchor

Answer

AIS navigational status code '1' means 'at anchor,' while '0' means under way using engine.

Question 5

What is the main purpose of a Vessel Traffic Service's CCTV system compared to its radar system?

Accepted Answer

CCTV allows visual identification and monitoring of vessels and waterway conditions

Answer

CCTV provides visual confirmation and situational awareness that radar cannot, including identifying vessel types, reading hull markings, and monitoring dock areas.

(VTS) Vessel Traffic Services Operator Exam Practice Test

(VTS) Vessel Traffic Services Operator Exam Practice Test

VTS Equipment and Technology 3