What is Ramark?

Ramark (RAdar MARKer) is a radar beacon used to mark navigational hazard which transmits either continuously or at intervals.

The latter method of transmission is more used so that the PPI can be inspected without any clutter introduced by the Ramark signal on the scope. The Ramark  signal as it appears on the PPI is a radial line from the Center. The radial line may be a continuous narrow line, a series of dashes, a series of dots, or a series of dots and dashes.