You are trained in how to properly use a tower shield.
When you use a tower shield, the shield’s armor check penalty only applies to Strength and Dexterity-based skills.
Fighters automatically have Tower Shield Proficiency as a bonus feat. They need not select it.
A character using a shield with which he is not proficient takes the shield’s armor check penalty on attack rolls and on all skill checks that involve moving, including Ride.
The text on this page is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
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SECTION 15