What is the phraseology for a wake turbulence advisory?

The phraseology for a wake turbulence advisory is designed to provide pilots with clear and concise information regarding potential wake turbulence hazards. The correct phraseology is "Caution wake turbulence (traffic information)." This statement effectively alerts the pilot to the presence of wake turbulence without being overly alarmist. It specifies that the advisory is related to traffic information, which helps pilots understand the context of the warning and take appropriate precautionary measures.

Using "Caution" conveys a sense of alertness without implying that immediate danger is present, which is crucial in maintaining a calm and focused operational environment. By incorporating traffic information, it further assists pilots in identifying the source of the wake turbulence, allowing them to make informed decisions regarding their aircraft's operations.

The other options, while they may convey a general warning about wake turbulence, do not adhere to the standardized phraseology used in air traffic control communications, and therefore do not provide the same level of clarity or context that the correct answer does.