Which of the following lists three characteristics of a good steering mark?

A good steering mark should have distinct features, be continuously visible, and be high enough to stand out from the surrounding terrain. These characteristics are essential for effective navigation. Distinct features ensure that the mark is recognizable and provides a reliable point of reference. Being continuously visible is critical because it helps maintain awareness of the steering mark as you progress, ensuring that navigators can stay on the intended heading without losing sight of the mark. Additionally, being elevated prevents the mark from blending in with other landscape features, allowing for easier spotting from a distance.

The other options do not provide the effective qualities needed for a steering mark. Discreet features and a low profile would make a mark harder to identify, while bright colors and moving objects can lead to confusion in navigation as they may not provide consistent and reliable referencing. Finally, while being located on a map, easily identified, and easily reached are useful aspects of navigation, they do not directly address the need for a steering mark's visibility and distinctness in changing environments.