A DECOR coordinate detector is a multilayer system of plastic streamer tube
chambers located around a NEVOD Cerenkov water calorimeter. The basic char
acteristics of the detector are as follows: the area is similar to 100 m(2)
, the angular resolution is similar to1 degrees and the space resolution is
similar to1 cm. The structure of the detector, data acquisition and trigge
r systems, and results obtained during the operation of a pilot assembly (8
chamber layers and a working area of 8.4 m(2)) are given.