Versatile Training (Ex)Source Weapon Master's Handbook pg. 19
The fighter can use his base attack bonus in place of his ranks in two skills of his choice that are associated with the fighter weapon group he has chosen with this option (see below). The fighter need not be wielding an associated weapon to use this option. When using versatile training, the fighter substitutes his total base attack bonus (including his base attack bonus gained through levels in other classes) for his ranks in these skills, but adds the skill’s usual ability score modifier and any other bonuses or penalties that would modify those skills. Once the skills have been selected, they cannot be changed and the fighter can immediately retrain all of his skill ranks in the selected skills 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 two times.
The Bluff and Intimidate skills are associated with all fighter weapon groups. The various fighter weapon groups also have the following associated skills: axes (Climb, Survival), bows (Knowledge [engineering], Perception), close (Sense Motive, Stealth), crossbows (Perception, Stealth), double (Acrobatics, Sense Motive), firearms (Perception, Sleight of Hand), flails (Acrobatics, Sleight of Hand), hammers (Diplomacy, Ride), heavy blades (Diplomacy, Ride), light blades (Diplomacy, Sleight of Hand), monk (Acrobatics, Escape Artist), natural (Climb, Fly, Swim), polearms (Diplomacy, Sense Motive), siege engines (Disable Device, Profession [driver]), spears (Handle Animal, Ride), and thrown (Acrobatics, Perception).