This document discusses Jeppesen's methods of communicating updates and changes regarding their navigation products and services. It outlines several types of notices and alerts used to disseminate different types of time-critical information to subscribers. These include NavData Alerts for commercial subscribers, Chart Alerts for paper/electronic charts, and Airport Moving Map Alerts. It also discusses weekly NavData Change Notices and Chart Change Notices posted online and through RSS feeds. All communications are intended to supplement official NOTAMs and ensure safe flight operations using up-to-date Jeppesen data and procedures.