(a) Except as allowed by paragraph (b) of this section, all self-propelled vessels must be fitted with a Federal Communications Commission (FCC) type accepted general marine radar system for surface navigation with a radar screen mounted at the primary operating station.(b) The following vessels are not required to carry a radar:(1) A ferry that operates on a rivers route within one mile of land; and(2) A vessel operated on a short restricted route, when the cognizant OCMI has determined that a radar is not necessary due to the vessel's route and local weather conditions.(c) The radar and its installation must be suitable for the intended speed and route of the vessel.