Consider the following statements regarding Collision Avoidance Systems (CAS):

1. CAS devices use sensing technologies such as radar, lidar, and cameras with object recognition to track the speed and position of nearby vehicles.

2. The 'Kavach' system uses Radio-Frequency Identification (RFID) technology to determine the train’s location and track ID.

3. Kavach' uses ultra-high frequency radio communication between the master computer and the locomotive computer for transmitting critical data.

Which of the statements given above is/are correct?