Adaptable Training (Ex)Source Armor Master's Handbook pg. 14
The fighter can use his base attack bonus in place of his ranks in one skill of his choice from the following list: Acrobatics, Climb, Disguise, Escape Artist, Intimidate, Knowledge (engineering), Profession (soldier), Ride, or Swim. The fighter need not be wearing armor or using a shield to use this option. When using adaptable training, the fighter substitutes his total base attack bonus (including his base attack bonus gained through levels in other classes) for his ranks in this skill, but adds the skill’s usual ability score modifier and any other bonuses or penalties that would modify that skill. Once a skill has been selected, it cannot be changed and the fighter can immediately retrain all of his ranks in the selected skill at no additional cost in money or time. In addition, the fighter adds all skills chosen with this option to his list of class skills. A fighter can choose this option up to four times.