What is the characteristic of Duwamish Head Light?

The characteristic of the Duwamish Head Light is commonly denoted as a flashing light with a specific interval. The correct answer indicates that it has a flash every 2.5 seconds. This characteristic helps mariners identify the light as they navigate, providing a reliable visual cue of the lighthouse's position and aiding in safer passage through the waters.

In lighthouse terminology, the flash intervals are crucial identifiers, meaning that the Duwamish Head Light will produce a flash of light for a brief period before going out, then repeating this sequence. Such differentiation is important among various lighthouses, as it can help nautical navigation significantly, especially in a busy shipping area.

The other options may refer to different types of light characteristics found in other lighthouses, but they do not correspond to the specific and accurate identification of the Duwamish Head Light’s function and signal pattern. Comparing the intervals or other attributes with regards to their general maritime navigation purposes illustrates the significance of proper identification to avoid confusion or potential navigation errors.