Entel HT 644 GMDSS - «Communication and Radionavigation SPB» Company

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Entel HT 644 GMDSS

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Radio HT644 execution in waterproof case capable of withstanding immersion to a depth of 5 m, IP68

With the included non-rechargeable battery of 2000 mAh for use in case of disaster and 1800 mAh rechargeable battery for everyday use.

The station HT644 is possible to add channels for personal use in order to ensure internal communication.

The station is also has an LCD display for channel nastroekt, warning the battery is low, the received signal strength, and more.

Features
Range	156 - 163.275MHz
Number of Channels	19 nautical international channels
Channel spacing	25 kHz
Type of connection	Simplex
Impedance	50 ohms
Antenna	Spiral
Batteries	Non-rechargeable battery 2000 mAh / 1800 mAh rechargeable battery
Power supply voltage	7.4V DC
Microphone	Internal microphone
Operating Temperature Range	-20 ° to +55 °
Dimensions (mm)	59.5 (W) x 130 (H) x 37 (D) W = 59.5 (62 including protrusions) B = 130 (145 including buttons) L = 37mm (41 projections including battery)
Weight	277 g (with battery and antenna)

Receiver
Receiver Type	Superheterodyne with double frequency conversion
Sensitivity	-0.25uV (12dB SINAD)
Frequency Stability	± 0.00025% (± 2PPM)
Parasitic reflection	-60 DB
Adjacent channel attenuation	-70 DB
Distortion	3% Typical
Hum and noise	-40 DB
Output power	1
Speaker size	38 mm

12.01.2015 Collection of useful maps
Inland waterways. Map of the division into areas of navigation. Euro-Asian Transport Corridors