Question 50G3

Address book entries in modern maritime radio systems, particularly those employing Digital Selective Calling (DSC) as part of the Global Maritime Distress and Safety System (GMDSS), are designed for versatility. Option B is incorrect because address books are used to facilitate calls to *both* other vessels and shore stations. DSC allows for direct ship-to-ship calls using a vessel's Maritime Mobile Service Identity (MMSI) number. Shore stations, including Public Correspondence Stations, also have MMSI numbers or can be dialed via entered telephone numbers. Options A, C, and D are all correct applications of an address book. Shore-based telephone numbers can be entered for automatic calls ashore (A). Public Correspondence Stations, which handle public radio traffic, are commonly entered (C). A vessel's name and its unique MMSI number are essential entries for ship-to-ship communication (D). The address book streamlines initiating various types of routine and safety calls to any recognized station.