Final answer:
Coast Guard aircraft ELTs are housed in high-visibility orange cases with G-Switches that activate in a crash to emit distress signals.
Step-by-step explanation:
Coast Guard aircraft Emergency Locator Transmitters (ELTs) are housed in high-visibility orange thermoplastic cases equipped with G-Switches that sense crashes, thereby automatically triggering the ELT to emit distress signals. When an aircraft suffers an impact strong enough, these G-Switches activate the ELT to send out a signal that can be used by rescue teams to locate the crash site. The use of a bright orange color for these cases is strategic, as it provides excellent visibility against different backgrounds, aiding in quick identification and recovery efforts.