What is the light character of an 'ODAS'?

The correct answer describes the specific light characteristics associated with an Offshore Data Acquisition System (ODAS). An ODAS typically emits a yellow light that can be seen from a minimum distance of five miles, and it has a specific signaling pattern that consists of a sequence of five flashes every 20 seconds. This signaling pattern serves a dual purpose: it aids in the identification of the ODAS and contributes to navigational safety by making its presence known to nearby vessels.

In identifying this correct answer, it is essential to note that the light's color, visibility range, and flashing sequence are all important aspects that distinguish it from other navigation lights used by different types of vessels or installations. The specific visibility range and the unique flashing pattern help mariners to recognize the system and avoid any potential collisions in the vicinity.