What does the symbol at GRICE intersection on an IFR low chart signify?

The symbol at the GRICE intersection on an IFR low chart indicates that the localizer has an additional navigation function. In the context of IFR navigation, intersections can serve multiple purposes, including being waypoints for approaches or supporting navigation using various systems. When a localizer is denoted with additional functions, it is often linked to both guidance for an ILS (Instrument Landing System) approach as well as potential lateral navigation for other operations, like RNAV (Area Navigation) routes.

This additional functionality is significant as it informs pilots that while the intersection can be utilized for standard localizer approaches, it also supports inbound or outbound procedures that could leverage both the localizer and other navigational aids.

Understanding the nuances of such symbols is crucial for pilots when planning their approach or departure, ensuring that they utilize all navigation aids available effectively and safely.