And it makes complete sense... The following info comes directly from the ACTD write up on the Saber class frigate. Note the testing schedule and "phaser training requirements" toward the end.
Phaser Range: The phaser range is located on deck 5. The phaser range is heavily shielded and the walls are armored. It is designed for low level phaser fire, but can withstand short phaser blasts at setting 16 without a problem.
The phaser range is used by security to train ship's personnel in marksmanship. During training, the holo-emitters in the phaser range are activated, creating a holographic setting, similar to what a holodeck does. Personnel are "turned loose" either independently or in an Away Team formation to explore the setting presented to them, and the security officer in charge will take notes on the performance of each person as they take cover, return fire, protect each other, and perform a variety of different scenarios. All personnel on board are tested every six months in phaser marksmanship.
There are 25 levels of phaser marksmanship. All personnel are trained in the operation of phaser types I and II up to level 14. All security personnel must maintain a level 17 marksmanship for all phaser types. The true marksman can maintain at least an 80% hit ratio on level 23.