You are skilled at using ranged weapons while mounted.
Prerequisites: Ride 1 rank, Mounted Combat.
Benefit: The penalty you take when using a ranged weapon while mounted is halved: –2 instead of –4 if your mount is taking a double move, and –4 instead of –8 if your mount is running (see Mounted Combat).
Special: A fighter may select Mounted Archery as one of his fighter bonus feats.
Source: Player’s Handbook (version 3.5), page 98.