FAF
On precision approaches, the glideslope (GS) intercept altitude is illustrated by a lightning bolt symbol and an altitude.
—Chart Users' Guide, pg 117
ILS Approach (precision)
The lightning bolt identifies the FAF (glide slope intercept).
GPS WAAS approaches use the term "glide path"
LOC Approach (non-precision)
The Maltese cross identifies the FAF for non-precision approaches.
- When no FAF is depicted, the final approach point is the point at which the aircraft is established inbound on the final approach course.
Sometimes these are the same point on the chart, but not always as shown above.
- Chart Users' Guide (PDF pg 116)
- F - Pilot/Controller Glossary: FAF