Federal supply group 63 is for alarm, signal and security detection systems. Aviation field completely depends on safety and security, so continuous enhancement in this field is a must. Safety and security in aviation is of huge importance due to a number of factors. Due to the environment in which the airplane travels, any overlook on safety has the potential to cause a catastrophe. Some examples that fall under this group are : railroad gates, flasher lights, oxygen pressure signals and warning devices. On the other hand the group does not include : railroad signals, semaphore flag signals, aircraft engine oil and fuel warning devices, aircraft oxygen warning devices. The federal supply group breaks down into the following federal supply classes :
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