Which type of light should not resemble navigational aid lights on a shore dive?

Marking entry/exit lights should not resemble navigational aid lights because their primary purpose is to help divers identify safe points for entering or exiting the water, rather than to guide navigation along a specific route. These lights are typically used to indicate specific locations relevant to diver safety, while navigational aid lights are designed to assist with navigation and orientation in the larger context of marine navigation.

In contrast, safety signal lights and emergency flares serve crucial roles in signaling distress or providing visibility in emergency situations, making them inherently different from a light designed merely for marking entry and exit points. Additionally, standard buoy lights are specifically created for navigation and hazard indication in waterways, and thus their function directly aligns with guiding divers through various aquatic environments. Therefore, it's essential that the lights used for marking entry and exit spots are distinct enough to avoid confusion with navigational aids, which are critical for safe maritime operations.