What is the primary focus of Pub 102?

The primary focus of Pub 102 is the International Code of Signals, which is a system used for maritime communication between ships and between ships and shore. This code consists of flags, signals, and a series of messages that can be conveyed through visual flags and lights, enabling ships from different countries to exchange information regardless of language barriers. Understanding the International Code of Signals is crucial for ensuring safety at sea, as it facilitates effective communication in various situations, such as distress, navigation instructions, and operational signals. This knowledge is essential for mariners to prevent misunderstandings that could lead to accidents or dangerous situations while at sea.