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An artillery observer, artillery spotter or forward observer (FO) is responsible for directing
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during si ...
and mortar
fire Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. At a certain point in the combustion reaction, called the ignition point, flames ...
onto a target. It may be a '' forward air controller'' (FAC) for
close air support In military tactics, close air support (CAS) is defined as air action such as air strikes by fixed or rotary-winged aircraft against hostile targets near friendly forces and require detailed integration of each air mission with fire and movemen ...
(CAS) and spotter for
naval gunfire support Naval gunfire support (NGFS) (also known as shore bombardment) is the use of naval artillery to provide fire support for amphibious assault and other troops operating within their range. NGFS is one of a number of disciplines encompassed by ...
(NGSF). Also known as fire support specialist (FiSTer), an artillery observer usually accompanies a tank or infantry maneuver unit. Spotters ensure that
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
hits targets which the troops at the fire support base cannot see. Because artillery is an indirect fire weapon system, the guns are rarely in line-of-sight of their target, often located miles away. The observer serves as the eyes of the guns, by sending target locations and if necessary corrections to the fall of shot, usually by radio. More recently, a mission controller for an Army Unmanned Air System (UAS) may also perform this function, and some armies use special artillery patrols behind the enemy's forward elements. Special forces such as the British SAS, US SEALs, Russian Spetsnaz can perform this role. These patrols will usually coordinate with heavier long range guns and assets and seek high value targets such as enemy HQs. This is in contrast to the artillery observer attached to field/line artillery which is working in support of its own combat group. Such patrols may also form into 'stay behind' parties which deliberately hide in special observation hides as the main force fights a withdrawal. Broadly, there are two very different approaches to artillery observation. Either the observer has command authority and orders fire, including the type and amount of ammunition to be fired, to batteries. Or the observer requests fire from an artillery headquarters at some level, which decides if fire will be provided, by which batteries, and the type and amount of ammunition to be provided. The first is characterized by the British, the second by the United States. In World War II both Germany and the Soviet Union tended towards the British method. In the US System, the observer sends a request for fire, usually to his battalion or battery Fire Direction Center (FDC). The FDC then decides how much fire to permit and may request additional fire from a higher artillery headquarters. FDC(s) convert the observer's target information into firing data for the battery's weapons. In the British system, the observer sends a fire order to his own and any other batteries authorized to them, and may request fire from additional batteries. Each battery command post converts the fire orders into firing data for its own guns. Until post-World War II the observer would usually order actual firing data to the guns of his own troop, this was enabled by the use of calibrating sights on the guns. Artillery observers are considered high-priority targets by enemy forces, as they control a great amount of firepower, are within visual range of the enemy, and may be located within enemy territory.


U.S. Army / U.S. Marine Corps

In the U.S. Army, a Light, Heavy, or Stryker Infantry company Fire Support Team (FIST) consists of a Fire Support Officer (FSO), a Fire Support Sergeant, three Forward Observers (FO), two Fire Support Specialists and three Radio Telephone Operators (RTO). Armored/Cavalry FIST teams usually consist of just one FSO and three enlisted personnel. Brigade COLT teams operate in groups of two individuals, a Fire support specialist in the grade of E-1 to E-4 and a Fire Support Sergeant in the grade of E-5. Currently in unit training is beginning to incorporate more close air support and close combat attack missions into the field artillery team's mission. In the U.S. Marine Corps, scout observers also act as naval gunfire spotters and call for, observe and adjust artillery and
naval gunfire support Naval gunfire support (NGFS) (also known as shore bombardment) is the use of naval artillery to provide fire support for amphibious assault and other troops operating within their range. NGFS is one of a number of disciplines encompassed by ...
, and coordinate fire support assets to include mortars, rockets, artillery, NSFS and CAS/CIFS. A rifle company Fire Support Team typically consists of a Fire Support Officer (FSO), Forward Air Controller (FAC) or Joint Terminal Attack Controller (JTAC), two scout observers (FO), and two radio operators (RO). In Weapons Company, the Fire Support Coordination Center (FSCC) determines fire support asset allocation to each rifle company FiST, and supervises the planning and execution of each FiST's fire support plan. Key players in the FSCC include the Fire Support Coordinator (FSC), Battalion Fire Support Officer (FSO), and Battalion Air Officer (Air-O).


British Forward Observation Officer

For centuries the Battery Commander had been responsible for controlling the fire of his battery. This continued with the introduction of
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
in the early years of the 20th Century. However, the First World War introduced 24 hour, seven days a week fighting. Furthermore, indirect fire had increased the distance between the guns and their targets, and between the observers and their guns. This led to the use of observing officers to act on behalf of the battery commander. In the 1938 re-organization of the
Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
batteries were divided into troops, with the troop commanders (Captains) as observing officers at an (OP). These officers and their parties could operate as either as an
Observation Post An observation post (commonly abbreviated OP), temporary or fixed, is a position from which soldiers can watch enemy movements, to warn of approaching soldiers (such as in trench warfare), or to direct fire. In strict military terminology, an ...
(OP) or accompany the supported arm (infantry or armour) as Forward Observation Officers (FOOs). During World War II it became the practice for close support battery commanders to become part of the tank regiment or infantry battalion headquarters they were supporting. They also started using 'quick fireplans' usually limited to their own regiment, to support fast moving limited battalion actions. Generally FOOs were assigned to a company or squadron of a battalion or regiment that their battery was supporting. In the British artillery system FOOs were always authorized to order fire commands to their own troop or battery, based on their assessment of the tactical situation and if necessary liaison with the supported arm commander. From mid World War II some artillery observers were authorized to order fire to all batteries of their regiment, it also became the practice for some observers to be designated 'Commander's Representative' able to order fire to a divisional or corps artillery. Unauthorized officers could request fire from more than their own battery. During that war it also became the practice that FOOs arranged quick fireplans comprising several coordinated targets engaged by guns and mortars to support short offensive actions by the squadron or company they were with. In World War II OP/FOO parties were normally mounted in an armored
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, although those assigned to support armored brigades usually had a tank - initially a Stuart but in NW Europe usually a Sherman. Tanks continued to be used by some observers until about 1975. In 2002 the British Army adopted the term Fire Support Team (FST) for its observation parties, including FACs under control of the artillery officer commanding the FST.


Mortar Fire Controller

A functionally similar title is "MFC" (Mortar Fire Controller). An MFC is an infantry NCO who is part of his battalion's mortar platoon. He controls platoon's fire in the same way as an FOO. The introduction of FSTs places MFCs under tactical control of the FST commander. Training, enabled by simulators, allows most soldiers to observe artillery fire, which has long been possible via a FOO.


Air Observation Post

The
Royal Flying Corps "Through Adversity to the Stars" , colors = , colours_label = , march = , mascot = , anniversaries = , decorations ...
and
Royal Air Force The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) an ...
had been responsible reporting targets and observation of fire in World War I, this role was subsequently called 'Arty/R, but proved difficult from high performance aircraft over hostile territory in World War II. In 1940 it was agreed that RAF AOP squadrons equipped with light aircraft, operating at low altitude over friendly territory and flown by
Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
officers would be formed. These squadrons existed until the formation of the Army Air Corps in 1957.


Use of unmanned aerial vehicles

Since the development of small
unmanned aerial vehicle An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without any human pilot, crew, or passengers on board. UAVs are a component of an unmanned aircraft system (UAS), which includes adding a ground-based controll ...
s (drones), they have been used for identifying targets, spotting
fall of shot Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim by ...
, and correcting aim. Operators are usually relatively close to the target, behind enemy lines, and subject to attack. Illustrating all aspects of drone spotting, and subsequent enemy attack.


See also

* Field artillery team * Fire Support Team (British Army) *
Forward air control Forward air control is the provision of guidance to close air support (CAS) aircraft intended to ensure that their attack hits the intended target and does not injure friendly troops. This task is carried out by a forward air controller (FAC). ...
*
Observation balloon An observation balloon is a type of balloon that is employed as an aerial platform for intelligence gathering and artillery spotting. Use of observation balloons began during the French Revolutionary Wars, reaching their zenith during World War ...


Notes


References

*U.S. Army FM 6-30 *U.S. Army FM 22-100 *U.S. Army FM 3-09.30 {{DEFAULTSORT:Artillery Observer Artillery speciality Combat occupations