1.  When the clearance limit is a fix from which an  approach begins, commence descent or descent  and approach as close as possible to the expect- further-clearance time if one has been received. If an  expect-further-clearance time has not been received,  commence descent or descent and approach as close as  possible to the estimated time of arrival as calculated  from the filed or amended (with ATC) estimated time  en route. 2.  If the clearance limit is not a fix from which an  approach begins, leave the clearance limit at the  expect-further-clearance time if one has been received.  If no expect-further-clearance time has been received,  leave the clearance limit upon arrival over it, and  proceed to a fix from which an approach begins and  commence descent or descent and approach as close as  possible to the estimated time of arrival as calculated  from the filed or amended (with ATC) estimated time  en route.  [Figure 11-8] While following these procedures, set the transponder to  code 7600, and use all means possible to reestablish two-way  radio communication with ATC. This includes monitoring  navigational aids (NAVAIDs), attempting radio contact with  other aircraft, and attempting contact with a nearby flight  service station (FSS). When the text box opens, the flashing cursor is located over  the nearest airport that meets the criteria set in the auxiliary  setup page as shown in  Figure 11-10 . Scrolling through the  25 airports is accomplished by turning the outer FMS knob,  which is located on the lower right corner of the display  screen. Turning the FMS knob clockwise moves the blinking  cursor to the next closest airport. By continuing to turn the  knob, the pilot is able to scroll through all 25 nearest airports.  Each airport box contains the information illustrated in  Procedures for accessing the nearest airport information vary  by the type of display installed in an aircraft. Pilots can obtain  information relative to the nearest airport by using the PFD,  multi-function display (MFD), or the nearest function on the  GPS receiver. The following examples are based on a popular  system. Pilots should become familiar with the operational  characteristics of the equipment to be used. With the advancements in electronic databases, diverting to  alternate airports has become easier. Simply by pressing a soft  key on the PFD, pilots can access information for up to 25 of  the nearest airports that meet the criteria set in the systems  configuration page.  [Figure 11-9]  Pilots are able to specify  what airports are acceptable for their aircraft requirements  based on landing surface and length of runway. Nearest Airports Using the PFD GPS Nearest Airport Function Figure 11-9. The default soft key Menu that is displayed on the The default soft key menu that is displayed on the PFD contains a “NRST” (Nearest Airport) soft key. Pressing this soft  key opens a text box that displays the nearest 25 airports.  11-9 NAV1108.00 113.00 NAV2108.00 110.60 134.000 118.000 COM1 123.800 118.000 COM2 $_{WPT }$______$_{ DIS }$__._ $_{NM DTK }$___$_{° TRK 360°}$ ALER TS  NRST  ALER TS  T MR/REF 5NM MAP WPT 1200 GND R LCL 16