Mostrando entradas con la etiqueta Royal Navy. Mostrar todas las entradas
Mostrando entradas con la etiqueta Royal Navy. Mostrar todas las entradas

viernes, 1 de noviembre de 2013

UUVs to stalk hostile submarines


Two high-profile events from the past three years have served to highlight the growing importance of the Unmanned Underwater Vehicle (UUV) in naval operations.


The first incident saw the Royal Navy minehunter HMS Brocklesby, operating off Libya in May 2011 as part of the NATO mission to enforce UN Security Council resolutions, deploy a SeaFox UUV to destroy a buoyant mine laid by pro-Gaddafi forces outside Misrata harbour. Subsequently, in August 2012, the US Navy sent dozens of SeaFox UUVs to the Persian Gulf after the Iranian government threatened to use its arsenal of Soviet-era mines to blockade the Strait of Hormuz, a move that would have effectively shut down a major proportion of the world's oil supplies.

Naval hydrographic and oceanographic units are using UUVs equipped with a wide array of sensors to chart the seabed and/or determine the characteristics of a given body of water, providing essential data for planning submarine and amphibious operations. Unmanned submersibles are also employed on search-and-rescue and intelligence, surveillance and reconnaissance missions. Meanwhile, trials have commenced in the US that will result in the introduction of a new class of deep-diving UUV designed to stalk hostile submarines.

martes, 3 de septiembre de 2013

SeaFox: A brief look

 
Basically, SeaFox is a mine disposal unmanned underwater vehicle (UUV) manufactured by Atlas Elektronik. Guided by a fibre-optic cable, this UUV is primarily used to detect and classify mines and other identified ordnance in sea, although can also be used in damage estimation, intelligence, route survey, maritime boundary control and harbour surveillance missions. The complete SeaFox system includes a console, a launcher, and the SeaFox vehicle. It can be launched from a range of naval platforms such as dedicated mine counter measures vessels (MCM), surface combatants, rubber boats and helicopters. The UUV is currently in service in more than ten countries, including Royal Navy, Royal Thai Navy, US Naval Surface Weapons Centre and US Navy.
 
 
Variants
SeaFox is mainly offered in four variants to meet the different mission requirements of users. The variants include SeaFox C (a one-shot mine identification and disposal vehicle system used as a tool to semi-automatically dispose mines and other related things found in the sea), Sea Fox I (a mine identification, inspection and training UUV), SeaFox T (a training version of the SeaFox C) and SeaFox COBRA, equipped with the COBRA explosive ordnance disposal (EOD) tool supplied by ECS Special Projects
 
 
Design features
All the variants of the SeaFox UUV have a similar physical design and dimensions. The UUV has an overall length of 1.31m and width of 0.39m. It is designed with a height of 0.39m, and weighs approximately 43kg. The UUV can be operated at a depth of up to 300m. It can operate at a maximum speed of 6kt. It has a maximum endurance of 100 minutes depending on the assignment and other conditions.
 
Navigation and sensor system
SeaFox uses transponder/responder aided dead reckoning (pressure sensor) for navigation in the sea. The operator communicates with the SeaFox using a fibre-optic cable. About sensors, SeaFox is equipped with FLS sensors and a TV camera to identify the target and acquire related information.
 
Propulsion and power
The vehicle includes four independent reversible motors and a hover thruster which provides high manoeuvrability in reaching the desired position. Both SeaFox C and SeaFox COBRA are powered by non-rechargeable LiSO2 battery, while Sea Fox I and SeaFox T variants use rechargeable NiMH batteries.