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DDOTI will be a wide-field robotic imager consisting of six 28-cm telescopeswith prime focus CCDs mounted on a common equatorial mount. Each telescope willhave a field of view of 12 square degrees, will have 2 arcsec pixels, and willreach a 10-sigma limiting magnitude in 60 seconds of r = 18.7 in dark time andr = 18.0 in bright time. The set of six will provide an instantaneous field ofview of about 72 square degrees. DDOTI uses commercial components almostentirely. The first DDOTI will be installed at the Observatorio Astron\'omicoNacional in Sierra San Pedro Mart\'ir, Baja California, M\'exico in early 2017.The main science goals of DDOTI are the localization of the optical transientsassociated with GRBs detected by the GBM instrument on the Fermi satellite andwith gravitational-wave transients. DDOTI will also be used for studies of AGNand YSO variability and to determine the occurrence of hot Jupiters. Theprincipal advantage of DDOTI compared to other similar projects is cost: asingle DDOTI installation costs only about US$500,000. This makes it possibleto contemplate a global network of DDOTI installations. Such geographicdiversity would give earlier access and a higher localization rate. We areactively exploring this option.

DDOTI: the deca-degree optical transient imager