Abstract: The digital output telemetering system for recording seismic signals comprises, according to the invention, a seismic channels commutator connected to an instantaneous automatic gain controller whose outputs are connected to an input of an analog memory and to inputs of a decoder. The latter has its two other inputs connected to a trigger output and a calibration output, respectively, of a unit for controlling a digital-analog converter. Outputs of the decoder are respectively connected to an input of an AND gate, a reset input of a counter and a second, control, input of the analog memory whose output is connected to an analog-digital converter. The latter has its output connected to an input of a receiving register whose other inputs are respectively connected to an output of a single-digit counter and an input of the decoder. The instantaneous automatic gain controller comprises two single-digit memories connected to a second input of the analog memory and to a second input of the decoder, respectively.

Abstract: A system for graphic representation of a vessel's position on the Mercator map, comprising a velocity and drift angle sensor and a heading sensor which are connected to a computer to compute the longitudinal and latitudinal velocity components. The computer has its outputs connected to respective binary multipliers which, in turn, are connected via a storage to a nonlinear converter and, via respective circuits incorporating frequency dividers, to integrating drives of a plotter intended to indicate the position of the vessel on the Mercator map. The nonlinear converter is intended to reproduce electric signals in the form of trigonometric functions and has its correction input connected to an output of an approximator of the correction for the meridional minute length at the location of the vessel. An information input of the nonlinear converter is connected to an output of an adder.