Module 19 - Electronic Navigation
Advanced Scenario Check
Decision pressure: The approach is narrowing, so the decision must be made before the last safe turn.
Advanced trap: Letting a precise-looking electronic display override contradictory independent evidence.
A strong Yachtmaster answer says what you would do now, what you would monitor next, and what would make you change the plan. It should sound like an instruction a crew could follow, not a paragraph copied from a textbook.
The screen says so.
Yachtmaster answer: Cross-check independent sources and name any conflict.
It should be fine.
Yachtmaster answer: State depth, time, sea room, weather, crew, or traffic margin.
I will see later.
Yachtmaster answer: Name a trigger: time, position, visibility, crew state, or equipment failure.
Everyone knows.
Yachtmaster answer: Give short crew instructions and confirm understanding.
| Examiner prompt | Weak answer | Yachtmaster answer |
|---|---|---|
| What is your evidence? | The screen says so. | Cross-check independent sources and name any conflict. |
| What is your margin? | It should be fine. | State depth, time, sea room, weather, crew, or traffic margin. |
| What changes the plan? | I will see later. | Name a trigger: time, position, visibility, crew state, or equipment failure. |
| What do you brief? | Everyone knows. | Give short crew instructions and confirm understanding. |
Key points
- Apply GNSS integrity, WGS84 datum, DOP, multipath, jamming, and spoofing to a changed real-world situation.
- Separate fact, estimate, and assumption.
- Show what you would brief to helm, navigator, lookout, or deck crew.
- Make the conservative option visible before defending any higher-risk choice.
Continue studying Electronic Navigation
This topic is part of Module 19. Open the full module for lessons, quizzes, flashcards, and revision tools.