Yes, the radio waves will still have the same frequency and wavelength from start to finish, assuming there is no significant interaction or modification of the waves along the path between Steven's ship and the other ship.
Radio waves are a form of electromagnetic radiation that have a specific frequency and wavelength. As they propagate through space, they generally maintain their frequency and wavelength unless they encounter certain phenomena or materials that can alter them.
In the scenario you described, where Steven is attempting to radio another ship miles away, the radio waves will travel through the vacuum of space (or possibly through the atmosphere) between the two ships. In the absence of any significant interactions or obstacles, such as dense materials or strong gravitational fields, the radio waves will propagate without experiencing any changes to their frequency or wavelength.
However, it's important to note that various factors can affect the transmission of radio waves over long distances, such as atmospheric conditions, interference, and the curvature of the Earth. These factors can introduce some attenuation or distortion to the radio waves, but they do not directly alter their frequency or wavelength.
In practical terms, as long as the radio communication equipment on both ships is designed to operate within the same frequency range, the waves transmitted by Steven's ship will reach the other ship with the same frequency and wavelength, allowing for successful communication.