International Code of Signals: For Visual, Sound, and Radio Communication

International Code of Signals: For Visual, Sound, and Radio Communication
The International Code of Signals is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. The code covers visual, sound, and radio communications.
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The International Code of Signals is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. The code covers visual, sound, and radio communications.
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