The article "Experiment to create a radio communication channel in the marine environment" (authors: A.K. Tomilin, A.F. Lukin, A.N. Gulkov) published in Journal "Technical Physics Letters" (2021, vol. 47, Issue 11) is analyzed from the standpoint of classical physics. The organization of the experiment in the mentioned publication, interpretation of its results, and theory underlying the work are criticized. The proposed material is a methodological commentary and is intended to form consistent approaches to be used in studying and interpreting further works on creation of radio communication channels. Keywords: Radio communication in the marine environment, electromagnetic waves, methodological notes