A current subscription to the runway database illuminates the RWY button. Pressing this button provides a worldwide collection of airports and their runways.  Field elevation, slope and length is associated with each runway.  By selecting an airport, the current weather (METAR) is displayed.  With the current winds known, the correct runway can be selected which completely fills out the field conditions screen.  Within the required gradient screen the NOS button illuminates.  Pressing NOS displays all departure procedures.  Pressing NOS on the Runway screen displays all current procedures. This service is an annual subscription which is charged automatically on the anniversary date.