You are trained in how to properly use a tower shield.

<php>echo “<b>Prerequisites:</b>”;</php> Shield Proficiency
<php>echo “<b>Benefit:</b>”;</php> When you use a tower shield, the shield’s armor check penalty only applies to Strength and Dexterity-based skills.
<php>echo “<b>Normal:</b>”;</php> 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.
<php>echo “<b>Special:</b>”;</php> Any character who is already proficient with shields is considered to have the Shield Proficiency feat for purposes of meeting this feat’s prerequisites.