Navy

Batteries have been used on underwater applications for more than a century, for instance, lead-acid batteries have been used in conventionally powered submarines since the end of the 19th century. Since World War II, submarines have used lead acid batteries. Lead acid batteries are heavy, but they’re also a proven …

Search and rescue (SAR) is the search for and provision of aid to people who are in distress or imminent danger. The general field of search and rescue includes many specialty sub-fields, typically determined by the type of terrain the search is conducted over. These include mountain rescue; ground search …

Small modular reactors (SMRs) defined as nuclear reactors generally 300MWe equivalent or less. SMRs have generated global interest, and potential future applications are a subject of international research directives.  Their are around 50 different SMR designs worldwide according to the IAEA.  Project proposals include use of SMRs for desalination, process …

In 2015, the People’s Republic of China’s (PRC, China) Ministry of National Defense published its military strategy which highlighted the increasing importance of maritime dominance stating that “the traditional mentality that land outweighs sea must be abandoned, and great importance has to be attached to managing the seas and oceans …

SOund Navigation And Ranging or SONAR is a technique of distance measuring between detector and an object base on sound reflection. The distance can be calculated from propagation time and speed of sound in specific mediums. For military, Sonars are the eyes and ears of ships or submarines in water …

Like the British Royal Navy more than a century before it, the U.S. Navy has a command of the sea that affords the United States unrivaled international influence.  By its use of the sea, which covers nearly three-quarters of the earth, a navy can do things that land-based forces cannot. …

Torpedoes are self-propelled guided projectiles that operate underwater and are designed to detonate on contact or in proximity to a target. For the U.S. Navy, the modern torpedo enables submarines to defeat surface and undersea threats and gives surface ships and aircraft the means to reach beneath the surface and …

One of the biggest problems with trying to get torpedos to travel faster is the fact that water is a thousand more times dense than air, so in order to overcome that resistance researchers have had to try a variety of different techniques. One of the  phenomenon called supercavitation uses …

The Excalibur smart artillery shell has a ruggedized Global Positioning System (GPS) satellite navigation receiver and uses satellite signals to help guide itself to its intended targets. It first was fielded in Iraq in 2007 for urban or complex-terrain engagements in which collateral damage must be kept to a minimum. …