Final answer:
The most dependable means of communication in a tactical environment is the Over method.
Step-by-step explanation:
In a tactical environment, the most dependable means of communication is the Over method.
The Over method is a military radio procedure where the transmitting station indicates the end of its transmission by saying the word 'Over.' This allows the receiving station to know that the transmission is complete and they can respond.
The Over method is preferred in a tactical environment because it helps maintain clear and efficient communication between personnel while minimizing confusion and interference.