Coordinate
You and your allies practice teamwork exercises, combat routines, and fundamental skills, building a rapport that pays dividends.
Activity
You spend the day training with at least one other creature who is performing the coordinate activity. Up to six creatures can train together this way, as long as each is using the coordinate activity.
Results
On the following day, when you grant a creature you trained with a bonus using aid another, covering fire, or harrying fire, you can increase that bonus by 1.
Multiday
For each consecutive day you spend coordinating with an ally, you increase by 1 the DC of Sense Motive checks to discern secret messages that you and that ally pass to one another using Bluff, up to a maximum of 7 higher. This increase lasts for the number of days you spent coordinating.
Special
-Source
Character Operations Manual pg. 151