As the helmets amplify 1.2 Ghz - 1.4 Ghz frequencies, they would be useful for picking up GPS & satellites, such as from space.
Perhaps the Trentham base is a production facility for such devices.
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As the helmets amplify 1.2 Ghz - 1.4 Ghz frequencies, they would be useful for picking up GPS & satellites, such as from space.
Perhaps the Trentham base is a production facility for such devices.