Basic characteristics of "Nayada-25M1" radar
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Coastal radar station "Nayada-25M1" is designed for above water situation control, detection of above water objects, determination of its coordinates and motion parameters. Radar "Nayada-25M1" provides:

a) circular (or sector) scanning n 3-cm waveband and above water targets detection (coasts, navigation marks, ships and other above water objects), determination of their current coordinates (distance, bearing), determination of motion parameters (heading, speed) under unintended interference;
b) automatic acquisition and autotracking of at least 120 above water targets at distances of at least 80% of their detection range;
c) manual input and taking for autotracking of at least 14 above water targets;
d) calculation of autotracked targets' motion parameters and display of the calculated information in digital and graphic form;
e) automatic data retrieval and output to the users of radar data;
f) frame-by-frame recording of the radar and graphic information with further playback on the screen of the video monitor unit;
g) radar data display at the electronic chart against the background of electronic chart of S57 format;
h) receipt and processing of the signals from automatic identification system;
i) receipt and processing of the data from satellite navigational receiver GPS/ GLONASS;
j) light and audible alarm about targets entering to the restricted zones when target is reset from autotracking and when the fault is detected in the equipment.

Basic performance characteristics of the radar are given in the Table:

Characteristic denomination	Value
1 Operating frequency, MHz	9410±30
2 Range scales, n mile	0,25-96
3 Direct impulse duration of transmitter, µs:
at the range scales 0, 25-1,5 n mile;	0,05-0,08
at the range scales 3-6 n mile;	0,20-0,35
at the range scales 12-96 n mile;	0,6-0,8
4 Transmitter microwave pulse power, kW, at least:
at the range scales 0, 25-1,5 n mile;	6
at the range scales 3-6 n mile;	9
at the range scales 12-96 n mile;	10
5 Pulse sensitivity of the receive-display path, dB/W, at least
at the range scales 0, 25-1,5 n mile;	minus 126
at the range scales 3-6 n mile;	minus 130
at the range scales 12-96 n mile;	minus 132
6Antenna rotation rate, r/min	24±4
7 Antenna rotating diameter, mm	2940 (for reference)
8 Antenna beamwidth at the level minus 3 dB, deg:
in horizontal plane;	0,8±0,1
in vertical plane;	20+8, minus 2
9 Antenna gain, dB, at least	32
10 Launching time, s, max	200
11 Power supply from AC mains 50 Hz, V	220±22 V
12 Power consumption, max, VA	400
13 Minimum detection range of the radar reflector with RCS 10 m2, located at the height of 2,5 m above sea level with probability 0,8, and with antenna installed at the height of 15 m above sea level, m	30
14 Range resolution on the range scale 1,5 n mile under discrete observation probability of 0,8, m, max	25
15 Direction resolution under probability of 0,8, max,:	1,2
16 Maximum error of the station ( with probability of correct measurement 0,95) when measuring using electronic range and bearing lines and cursor:
- bearing;	0,3°
- range	10 m or 0,5 % of the installed range scale value, whichever is greater