Field target

Field target is an outdoor air gun discipline originated by the National Air Rifle and Pistol Association in the United Kingdom in 1980.

UK rules

In UK (United Kingdom) rules, competitors aim to shoot the small “kill” zone that forms part of a larger metal faceplate. These face plates are often shaped to resemble small game animals, although there is currently a move towards simple geometric shapes. On most competition targets, the hit zone forms the end of a short lever that tips the faceplate backwards when successfully hit. These targets have to be reset by tugging on a length of cord attached to the faceplate above the hinge.

Targets are shot from open “gates” in a firing line, and are divided into “lanes” of two targets each. Many competitions impose a time restriction of 2 minutes to shoot both targets after a competitor first looks through his or her sights.

Targets may be placed at any distance between 8 yards (7.3 m) and 55 yards (50.3 m) from the firing line. Targets are often placed at about the same height as the shooter, but it is not uncommon for them to appear high up banks or in trees, or down steep slopes.

Hunter Field Target

Hunter field target (HFT) is a target shooting sport derived from the air gun disciplines of field target shooting and hunting. Primarily an outdoor sport, shot with air rifles (rated at a maximum of 12 ft·lbf), a typical HFT course is made up of 30 lanes, with each lane consisting of a peg and a metal "knock down" target placed in a position to simulate a hunting scenario. The peg marks the shooting spot and the shooter must touch the peg with part of his or her body or gun for the shot to count.

The targets are mainly based on typical quarry such as rabbit, rat, crow, magpie and grey squirrel. They are made from metal and mimic their counterparts in both shape and size. Each target has a circular "kill zone" that varies in size, (typically 15–45 mm in diameter), and are set out at varying ranges (typically 8-45 yards/7.3-41.1 m). A direct hit to the "kill zone" triggers a mechanism that makes the target fall back flat, simulating a "kill". Successfully "killing" a target rewards you with two points and the target is reset by pulling the "reset cord". "Plating" a target (hitting the target anywhere but the "kill zone") rewards you with one point. Missing the target altogether results in a zero.

Hunter Army Airfield

Hunter Army Airfield (IATA: SVN, ICAO: KSVN, FAA LID: SVN), located in Savannah, Georgia, United States, is a military airfield and subordinate installation to Fort Stewart located in Hinesville, Georgia.

Hunter features a runway that is 11,375 feet (3,468 m) long and an aircraft parking area that is more than 350 acres (1.4 km²). The runway and apron, combined with the 72,000 sq ft (6,689 m²) Arrival/Departure Airfield Control Group (A/DACG) Facility and nearby railhead, allow the 3rd Infantry Division from nearby Fort Stewart to efficiently deploy soldiers and cargo worldwide. NASA identified Hunter as an alternate landing site for the Space Shuttle orbiters.

Tenants

Currently, Hunter Army Airfield has approximately 5,000 soldiers, airmen and coast guardsmen on station. It is home of the aviation units of the 3rd Infantry Division (Mechanized) headquartered at Fort Stewart. There are also a number of non-divisional units assigned to Hunter as well.

High frequency

High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 MHz. It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred metres). Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere – a method known as "skip" or "skywave" propagation – these frequencies are suitable for long-distance communication across intercontinental distances. The band is used by international shortwave broadcasting stations (2.310 - 25.820 MHz), aviation communication, government time stations, weather stations, amateur radio and citizens band services, among other uses.

High-frequency trading

High-frequency trading (HFT) is a type of algorithmic trading characterized by high speeds, high turnover rates, and high order-to-trade ratios that leverages high-frequency financial data and electronic trading tools. While there is no single definition of HFT, among its key attributes are highly sophisticated algorithms, specialized order types, co-location, very short-term investment horizons, and high cancellation rates of orders. HFT can be viewed as a primary form of algorithmic trading in finance. Specifically, it is the use of sophisticated technological tools and computer algorithms to rapidly trade securities. HFT uses proprietary trading strategies carried out by computers to move in and out of positions in seconds or fractions of a second. It is estimated that as of 2009, HFT accounted for 60-73% of all US equity trading volume, with that number falling to approximately 50% in 2012. High-frequency traders move in and out of short-term positions at high volumes and high speeds aiming to capture sometimes a fraction of a cent in profit on every trade. HFT firms do not consume significant amounts of capital, accumulate positions or hold their portfolios overnight. As a result, HFT has a potential Sharpe ratio (a measure of reward to risk) tens of times higher than traditional buy-and-hold strategies. High-frequency traders typically compete against other HFTs, rather than long-term investors. HFT firms make up the low margins with incredibly high volumes of trades, frequently numbering in the millions.