Which FM covers tactical single channel radio communication techniques?

The correct choice is indeed the field manual that specifically addresses tactical single channel radio communication techniques. FM 24-18 is dedicated to communications-electronics operations and includes guidance on the use of single-channel radios in various tactical scenarios. It provides essential procedures, operational considerations, and techniques that are vital for effective communication on the battlefield, making it crucial for personnel involved in tactical operations. Proper understanding and application of the content in this FM ensure that soldiers can communicate effectively in diverse environments, enhancing coordination and mission success.

The other field manuals mentioned cover different aspects of military operations and communications. They do not focus specifically on single-channel radio techniques, which makes them less relevant in this context. FM 100-14 deals with the principles of warfare, FM 3-21.5 focuses on individual drills and small unit tactics, and FM 3-25.26 covers map reading and land navigation, none of which center around single-channel radio communication in tactical environments.