You are approaching a light fitted with a RACON. The light may be identified on the radar by __________.

The correct identification of a light fitted with a RACON on radar is through a coded signal that appears on the same bearing at a greater range than the light itself. This is because a RACON emits a specific coded radar signal in response to radar interrogation. When a ship's radar transmits a signal, the RACON will respond with a unique pattern that indicates its presence, which is then displayed on the radar screen. This coded signal helps mariners to distinguish it from other objects and confirms the identity and position of the RACON-equipped light effectively.

The identification through this method is particularly crucial in navigation as it allows for accurate location determination in relation to recognizable navigational aids. The ability of the RACON to signal back on the radar provides additional, critical information that can aid in decision-making, especially in poor visibility conditions.

The choices that involve a dashed line, an audible signal, or a surrounding circle do not specifically pertain to the unique coded response that a RACON provides. Therefore, focusing on the coded signal highlights the essential operational aspect of RACONs in electronic navigation.