PTS - Personal Track Safety Safety Critical Communications Questions and Answers — Questions and Answers
Question 1: When relaying a message to the signaller that contains important alpha-numeric information (e.g., a signal number like 'T345'), what is the correct communication protocol to ensure clarity?
- Say the letters and numbers clearly and then ask if they understood.
- Use the standard railway phonetic alphabet for the letters and say each number individually. (Correct answer)
- Repeat the entire message three times to ensure it is heard correctly.
- Text the information to the signaller as a follow-up to the verbal conversation.
Correct answer: Use the standard railway phonetic alphabet for the letters and say each number individually.
To prevent misinterpretation of letters that can sound similar (e.g., 'B' and 'C', or 'M' and 'N'), the standard railway phonetic alphabet (Alpha, Bravo, Charlie, etc.) must be used for spelling out letters in safety-critical communications. Numbers should be spoken as individual digits (e.g., 'Three Four Five').
Question 2: A COSS is using a radio to inform the team that the line is blocked. Which of the following phrases is the standard and correct way to conclude the transmission when a reply is expected?
- "Line is blocked, got it?"
- "Line is blocked, end of message."
- "Line is blocked, over." (Correct answer)
- "Line is blocked, roger."
Correct answer: "Line is blocked, over."
In standard radio communication protocol on the railway, the word 'Over' signifies that the sender has finished their message and is expecting a reply from the receiver. 'Out' is used when no reply is expected.
Question 3: You are part of a work group and your COSS gives you a safety-critical instruction. To ensure the instruction is understood perfectly, what should be the second step in the three-way communication process?
- You immediately carry out the instruction as given.
- You repeat the instruction back to the COSS in your own words to confirm understanding. (Correct answer)
- You ask another member of the work group if they heard the same thing.
- You wait for the COSS to ask you if you understood the instruction.
Correct answer: You repeat the instruction back to the COSS in your own words to confirm understanding.
Three-way communication is a key safety protocol. The process is: 1) The sender gives the message. 2) The receiver repeats the message back (repeat-back) to the sender to confirm they have understood it correctly. 3) The sender confirms that the repeat-back is correct. This ensures mutual understanding before any action is taken.
Question 4: If you make a mistake while relaying information during a safety-critical call, what is the correct procedural word to use immediately before stating the correct information?
- "Correction." (Correct answer)
- "My mistake."
- "Ignore that."
- "Belay that last."
Correct answer: "Correction."
The standard phraseology for correcting an error in a spoken safety-critical message is to say the word 'Correction,' followed by the correct word or phrase. This is a clear, unambiguous way to alert the listener to the error and the information that will replace it.
Question 5: A colleague is struggling to hear your instructions over a noisy radio connection. Which of the following is the most appropriate action to improve the clarity of your communication?
- Shout as loudly as possible into the microphone.
- Speak much faster to get the message across quickly.
- Move the microphone further away from your mouth.
- Speak slightly slower than normal in a clear, distinct voice. (Correct answer)
Correct answer: Speak slightly slower than normal in a clear, distinct voice.
When radio communication is difficult, shouting can distort the sound and make it harder to understand. The best practice is to speak clearly and slightly slower than your normal pace, without shouting, to give the listener the best chance of understanding the message.
Question 6: Which of the following statements best describes the purpose of using standard communication protocols, like the phonetic alphabet and three-way communication, in a railway environment?
- To make communications sound more professional and technical.
- To reduce the time it takes to pass on important messages.
- To minimise the risk of misunderstanding, which could lead to an accident. (Correct answer)
- To create a formal record of all conversations for audit purposes.
Correct answer: To minimise the risk of misunderstanding, which could lead to an accident.
The primary goal of all safety-critical communication protocols is to ensure accuracy and clear understanding. Misinterpreting a message about line blockages, train movements, or site hazards can have catastrophic consequences. These standardized methods are designed specifically to prevent such misunderstandings.
PTS - Personal Track Safety Safety Critical Communications Questions and Answers
When relaying a message to the signaller that contains important alpha-numeric information (e.g., a signal number like 'T345'), what is the correct communication protocol to ensure clarity?