I'm curious as to the reasoning behind a recent NOTAM. Between 2300 and 0400 the following applies:
TWR AND APPROACH SERVICES WILL BE PROVIDED AS A COMBINED FUNCTION
ON FREQUENCY 128.5 WHEN NOTIFIED BY ATIS OR ON 120.9 IF 128.5 IS OUT
OF SERVICE.
Is there any reasoning behind this other than to avoid having to switch frequencies during very quiet periods? I haven't heard these frequencies shared between tower and approach in the past. New thing or just temporary?