Question 46F6

Vessel Data Recorders (VDRs) capture critical operational data from a ship. Statement D is NOT true because while Position, Date, and Audio from the bridge are standard VDR inputs, the *content* of Maritime Safety Information (MSI) is generally not directly recorded by a VDR. VDRs focus on internal operational parameters and external physical conditions relevant to navigation and incident investigation, rather than the content of incoming safety broadcasts. * **A) The “Crash Survivable Module” (CSM) retains data for up to 12 hours.** This is TRUE. The CSM is designed to protect a minimum of 12 hours of recorded data in extreme conditions (fire, impact, deep water). * **B) The “Data Acquisition Unit” (DAU) may have data storage for as long as 30 days.** This is TRUE. While the CSM holds 12 hours of *survivable* data, the DAU often contains additional non-survivable storage that can retain data for much longer periods (e.g., 30 days) for routine operational review. * **C) Data input may include Rudder feedback, Depth of water and Radar.** This is TRUE. These are essential operational inputs for a VDR, providing information about the ship's control, surrounding environment, and collision avoidance efforts.