What is commonly directed at a tow at night to indicate its presence?

In navigation and maritime operations, it is crucial to indicate the presence of a tow, particularly at night when visibility is reduced. A searchlight is commonly used for this purpose because it can project a strong beam of light over a considerable distance. This makes it effective for signaling other vessels, allowing them to see the tow and adjust their course accordingly to avoid collisions.

Using a searchlight also allows for better identification of potential hazards or navigation aids along the route. Its intensity and focused beam enable operators to highlight the tow's location significantly, making it a preferred choice for night-time operations. In contrast, tools like flashlights, floodlights, and laser pointers serve different functions and may not provide the same effective indication of a tow at night.