Gauge
From Final Fantasy Wiki
Gauge is a useful ability available to Beastmasters in Final Fantasy XI starting at level 10. The ability has a short recast timer, only 30 seconds, and it allows a player to see if they would be able to charm a particular creature. It will even give him a general idea of the probability that his charm will be successful (ie: It would be very difficult to charm the enemy or the player should probably be able to charm this enemy). Charm does create considerable enmity if it does not work and gauge creates absolutely no enmity when it is used.
