Final answer:Repeaters in submarine cables, which are essentially the underwater equivalent of transmission lines, are spaced at roughly 100 kilometers apart. Their role is to amplify the signal to counteract signal attenuation over long distances, a concern effectively addressed by such technologies as the use of coaxial cables.Explanation:Submarine cables, essentially the underwater version of transmission lines, have repeaters placed at intervals of about 100 kilometers. The main role of these repeating stations is to amplify the signal in order to combat signal attenuation over long distances. The reasons they are spaced at these distances are due to considerations that need to be factored in, such as the strength of the signal, power supply, and the potential interference from opposing currents. These points are not a concern for the surveyor’s magnetic field measurements. This way, the signal can effectively maintain its field strength across considerable distances. For instance, Coaxial cables are often employed in these scenarios as they virtually eliminate anyfield interferencefor DC power lines.Learn more about Submarine cable repeaters here:brainly.com/question/34079250#SPJ11...

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