What key skill is not specifically mentioned as part of SWCC training?

The key skill that is not specifically mentioned as part of SWCC (Special Warfare Combatant-craft Crewmen) training is aerial reconnaissance. SWCC training primarily focuses on several crucial skills essential for maritime special operations, including navigation, boat tactics, and swimming evolutions.

Navigation is vital for the operation of small craft in diverse environments, and boat tactics are critical for effective maneuvering and operations in combat scenarios. Swimming evolutions reflect the need for physical preparedness and the ability to operate in a maritime environment, which is fundamental for SWCC candidates given their engagement in waterborne missions.

Aerial reconnaissance, however, while important in the broader context of special operations and intelligence gathering, is typically associated with other specialties within the naval special warfare community, such as naval aviation or specific reconnaissance units. Therefore, it does not form a core component of the SWCC training curriculum, thereby making it the correct answer in this context.