aid response with local communities. Military LMR: Used by the military services for tactical and training operations on a non-interference basis. (Band is otherwise non-government exclusive). 46.6–47 Govt. FIXED MOBILE Allocation: Non-Military LMR: Extensive use of this band is for contingency response to various national disasters. Others uses are for national resources management, law enforcement, tornado tracking, and various meteorological research support. Military LMR: This band is used primarily for tactical and training operations by U.S. military units for combat net radio operations that provide command and control for combat, combat support, and combat service support units. Frequencies also used for air-to-ground communications for military close air support requirements as well as some other tactical air-ground and air-air communications. 47–49.6 Experimental:Used for experimental research to observe and measure currents in harbor areas in support of vessel safety. Military LMR: Used by the military services for tactical and training operations on a non-interference basis. (Band is otherwise non-government exclusive). 49.6–50 Govt. FIXED MOBILE Allocation: Non-Military LMR: This band is used extensively to support contingencies or ecological emergencies, some public safety requirements, MARS system, and air-quality measurements. Experimental: Research is performed in various regions of the atmosphere as well as experimental development of portable space orbital debris ground radars. Military LMR: This band is used primarily for tactical and training operations by U.S. military units for combat net radio operations that provide command and control for combat, combat support, and combat service support units. Frequencies also used for air-to-ground communications for military close air support requirements as well as some other tactical air-ground and air-air communications. FCC (NON-Federal) allocations for the band: Primarily Land Mobile use from 43-46.6. 46.61-46.89 is used by older cordless phone base stations. The handsets use the 49.61 - 49.89 range for transmitting to the base unit. 47.0-49.60 is used by LMR and then the cordless phone range. Early experiments with meteor scatter one way messaging was in the 49 - 50 range back in the early 1990s but it no longer exists due to reliable and cheaper satellite communications. There is also a conflict with the de facto intermediate frequency for system M television, where receiver tuners shift and flip the incoming signal onto 41.25 MHz (analogue audio) and 45.75 MHz (analogue video) after the initial RF amplifier. This standard was adopted due to image frequency problems when UHF television broadcasting initially struggled to life in 1952.