  We present the design of two velocity spectrometers, to be used in the
recently approved CKM experiment. CKM's main goal is the measurement of the
branching ratio of K+ -> pi+ nu nu with a precision of 10%, via decays in
flight of the K+. The design of both RICH detectors is based on the SELEX
Phototube RICH. We will discuss the design and the expected performance, based
on studies with SELEX data and Monte Carlo Simulations.
