The underwater grenades UWG-0.5E and UWG-0.75E are an important component of the navy bases protection and individual ship defense against terrorist divers.
The underwater grenades UWG-0.5E and UWG-0.75E are operated by a microprocessor system and electronic pressure sensor.
Each grenade consists of a body filled with explosives and a fuse which operates only if a certain depth is reached. The body and the fuse of the grenades are transported and kept safely in separated packages according to safety standards.
Out of the water, the fuses are completely safe and shock-resistant, even with the safety pin and lever removed.
The mode of operation of the grenade is as follows:
- The transport cap of the fuse is removed – the indicator light shows the status of the fuse;
- The fuse is fixed to the body of the grenade. When dropped in the water, the grenade
starts to sink rapidly and when a depth corresponding to pressure of 0.6-0.8 bar is reached,
the firing pin is released, initiating the detonator and the grenade explodes.
An automatic self-neutralization occurs in 30 minutes after contact with water, to reduce the risk of unexploded grenades threatening busy harbors.
| Technical characteristics | ||
|---|---|---|
| Grenade type | UWG-0.5E | UWG-0.75E |
| Gross weight, kg | 1.0 | 1.3 |
| Weight of explosive, kg TNT equivalent | 0.6 | 0.9 |
| Overall dimensions, mm | ||
| – Diameter | 94 | 94 |
| – Height | 135 | 150 |
| Depth of activation, m | from 6 to 8 | from 6 to 8 |
| Neutralization after contact with water, min | 30 | 30 |
| Fuse type | Electronic | Electronic |
| Activation pressure, bar | from 0.6 to 0.8 | from 0.6 to 0.8 |
| Storage temperature, °C | from -20 to +60 | from -20 to +60 |
| Shelf life at storehouse temperature between +5°C and +30°C, years | 5 | 5 |
| Shelf life at under shelter at temperature between -20°C and +60°C, years | 2 | 2 |
