What rotary-wing movement technique is used when enemy contact is possible?

The technique referred to in the scenario where enemy contact is possible is Traveling Overwatch. This movement technique is specifically designed to provide a balance between speed and security when maneuvering in potentially hostile areas.

In Traveling Overwatch, the rotary-wing aircraft maintains a formation that allows it to react quickly to threats while still covering ground efficiently. One aircraft can be in a position to provide overwatch and observe for threats while the other maneuvers ahead, ensuring that if contact is made, there is immediate support available. This method allows for flexibility; in case of engagement, the aircraft can quickly shift roles or reposition for a more advantageous attack or defense.

Bounding Overwatch would be more deliberate and slower, with aircraft moving in a methodical manner and waiting for one element to establish security before the next moves. This is less appropriate for fast-moving rotary-wing operations where immediate action may be required. The option "Traveling" alone does not maintain the necessary level of observation and readiness in the presence of potential enemy contact. Hence, it does not offer the tactical advantages provided by Traveling Overwatch.