25Each of these time stamps is a date-time group in“DDHHMMZ” format, where:• DD is the day of the month• HH is the hour of the day• MM is the minute of the hour• Z is a time zone designator indicating that thedate and time are for standard time on theGreenwich meridian: that is, UTC (Coordi-nated Universal Time).Section 4: XM AudioAudio entertainment is available through the XMSatellite Radio Service when activated in the optionalinstallation of the GDL 69A. The 400W and 500Wseries units serve as the display and control head foryour remotely mounted GDL 69A. XM Satellite Radioallows you to enjoy a variety of radio programmingover long distances without having to constantlysearch for new stations. Based on signal from satellites,coverage far exceeds land-based transmissions. Whenenabled, the XM Satellite Radio audio entertainment isaccessible in the AUX function.The information on the XM Satellite Radio displayis composed of four areas: the Active channel, avail-able Channels, Category of the highlighted channel,and the Volume setting. The Active Channel windowshows the Channel Name and Number, Artist, SongTitle, Category, and provides an indication of signalstrength. A bar graph next to the antenna symboldescribes the signal strength. Maximum signal strengthis shown by three full bars.Part Two: Section 4XM AudioCategory nameSong title Audio output (enabled or disabled)SliderChannel NameSignal strengthindicatorArtist nameChannelnumberPointer showingcurrent selectionbeing playedChannel nameXM Audio Page DescriptionChannelnumber190-00356-30 Rev H