Which characteristic is essential for soldier radios in tactical communications?

Portability and durability are essential characteristics for soldier radios in tactical communications due to the nature of their operational environment. Soldiers often operate in diverse and challenging conditions, which require communication equipment that can easily be carried and used without burdening the soldier. Portability allows for easier movement and maneuverability, which is critical in combat or on the battlefield.

Additionally, durability ensures that the radios can withstand harsh conditions such as extreme temperatures, moisture, dust, and physical impacts. Reliable communication is vital in tactical situations, and any failure in equipment can compromise mission success or soldier safety. Therefore, radios must be designed to be both lightweight for ease of transport and rugged enough to endure the rigors of field operations. This combination directly supports the effectiveness of tactical communication in military operations.