Communications and operational documentation
What this domain tests
The exam tests standard phraseology, read-back, the phonetic alphabet, GSM-R priorities, signal post telephones, and operational documents such as the WON, notices, diagrams, and route cards. It checks whether you can receive, confirm, and act on information without ambiguity.
Communication standards
- Read back safety-critical instructions, signal identities, locations, and times.
- Use the phonetic alphabet for signal prefixes, locations, and train descriptions.
- Keep messages short and structured: who you are, where you are, what you need.
- GSM-R priority: emergency calls take precedence; know how to make one and when to use it.
- Signal post telephone: use it when directed or when GSM-R is unavailable; identify the signal and yourself.
Documentation
- WON: weekly operating notice; check effective dates, locations, lines, and speed restrictions.
- Notices: special notices may change or suspend normal working.
- Diagrams and route cards: working tools, not official authority; update them when the WON changes.
Worked example
A WON amendment changes a speed restriction from 40 mph to 20 mph from midnight on a route you sign. What do you do?
Reasoning: read the entry carefully and confirm the location, line, direction, and effective date and time. Brief yourself and, where required, others. Update your route card. On the first train after midnight, apply the 20 mph restriction from the correct point. Do not rely on memory or assume the old speed still applies.
Traps that cost marks
- Paraphrasing instead of reading back.
- Missing the effective date or the line to which a restriction applies.
- Treating a personal route card as authority over the WON.