What characteristic is associated with a masthead light?

A masthead light is a white light that is typically mounted on the forepart of the vessel’s superstructure, and it serves a crucial role in maritime navigation. Its primary characteristic is that it must be displayed from the direction of dead ahead, meaning it is visible to vessels approaching from the front. This placement helps ensure that other vessels can easily determine the orientation and status of the vessel displaying the light, particularly in darkness or reduced visibility.

The visibility of the masthead light assists in the safe navigation of vessels at night or in poor weather. This light helps other mariners identify the heading of the vessel, contributing to collision avoidance. It is worth noting that the other characteristics presented in the options do not accurately define a masthead light, as it is not a colored light, it is not shown from the stern, and though part of its function is to be visible from a range of angles, it specifically shines in the forward direction.