Which signal means "You are seen and assistance will be given as soon as possible"?

The signal indicating "You are seen and assistance will be given as soon as possible" is represented by three white star signals. This particular distress signal is universally recognized in maritime communication and indicates that the ship in distress has been spotted, and aid will be dispatched shortly.

The use of three white star signals is a standardized method within the international regulations for preventing collisions at sea, which enhances the clarity of maritime distress communications. This signal is particularly effective in conveying urgency and ensuring that rescuers understand the need for assistance without any ambiguity.

In contrast, the other options convey different meanings or are generally not established distress signals. For example, three red flares typically indicate a distress situation but do not specifically assure that help is on the way. A continuous horn blast may serve as a warning or signaling for attention but lacks the definitive clarity regarding assistance. A green light shown continuously is commonly used to denote a safe passage or to indicate a vessel's presence but does not communicate a request for rescue or guaranteed assistance.