🔍 Key Concepts
• VDR (Voyage Data Recorder) requirements under SOLAS – what types of data must be recorded continuously
• Difference between navigational / sensor data and external communications like EGC (Enhanced Group Call) or satellite messages
• Typical core data set: position, time, speed, heading, bridge audio, VHF, radar images, depth, etc.
💭 Think About
• For each option, ask yourself: Are ALL the listed items part of the standard data set that a VDR is required to record? Or is there one item that doesn’t normally belong?
• Look for the choice that mixes one item that is more like a shore-communications / message service rather than a direct shipboard sensor or audio/visual recording.
• Compare which items are clearly related to reconstructing the ship’s navigation and bridge actions right before an incident.
✅ Before You Answer
• Verify which items are explicitly listed in SOLAS V/20 – Voyage Data Recorders performance standards (e.g., position, date/time, speed, heading, radar, VHF, bridge audio, depth).
• Check whether EGC (Enhanced Group Call) data is a standard VDR input or more associated with Inmarsat SafetyNET / MSI reception, which may not be routinely recorded by the VDR.
• Ensure each option’s items could be taken directly from ship sensors or bridge microphones; flag any item that doesn’t fit that pattern.