What is a primary characteristic of the SM-6 missile?

The SM-6 missile is primarily characterized by its very high flying capabilities and long range. It is designed to support naval forces, providing an effective response to both air and missile threats over significant distances. This capability is crucial as it allows naval vessels to engage threats well beyond the horizon, enhancing defensive measures against cruise missiles and aircraft. The SM-6 integrates advanced technology that enables it to operate in various roles, including anti-air warfare, strike warfare, and terminal air defense, further affirming its versatility in modern maritime combat scenarios.

The other options do not accurately describe the SM-6's capabilities. While ground attack capabilities are not a primary function of the SM-6, it is specifically engineered for air defense. Infrared guidance is also not a defining feature of the SM-6, as it utilizes an advanced multi-modal guidance system instead. Also, characterizing it as short range and low altitude does not reflect its operational design and utilization in theatre warfare.