Abstract
A recent paper by Masters and Leise that addresses the problem of correcting inertial navigation data using Loran C describes another variation on the traditional approach that has been used by researchers in the airborne science community for many years. Somewhat disturbing are several inaccurate statements in their paper concerning possible problems in the use of modern Kalman filtering-smoothing techniques in this context. This correspondence attempts to clarify some of the misconceptions and errors expressed in their paper, based on the authors' own positive experiences with applying Kalman filter-smoother algorithms to correct inerfial navigation data being supplied by a modem strapdown navigation system.
