A private is a soldier, usually with the lowest rank in many armies. Soldiers with the rank of private may be conscripts or they may be professional (career) soldiers.
On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over the correct route and to the proper timetable. Signalling control was originally exercised via a decentralised network of control points that were known by a variety of names including signal box, interlocking tower and signal cabin. Currently these decentralised systems are being consolidated into wide scale signalling centres or dispatch offices. Whatever the form, signalling control provides an interface between the human signal operator and the lineside signalling equipment. The technical apparatus used to control switches (points), signals and block systems is called interlocking.
Railway signalling (BE), also called railroad signaling (AE), is a system used to control the movement of railway traffic. Trains move on fixed rails, making them uniquely susceptible to collision. This susceptibility is exacerbated by the enormous weight and inertia of a train, which makes it difficult to quickly stop when encountering an obstacle. In the UK, the Regulation of Railways Act 1889 introduced a series of requirements on matters such as the implementation of interlocked block signalling and other safety measures as a direct result of the Armagh rail disaster in that year.
The Quintinshill rail disaster was a multi-train rail crash which occurred on 22 May 1915 outside the Quintinshill signal box near Gretna Green in Dumfriesshire, Scotland. It resulted in the deaths of over 200 people and remains the worst rail disaster in British history.
A signaller, signalman, colloquially referred to as a radioman or signaleer in the armed forces is a specialist soldier, sailor or airman responsible for military communications. Signallers, a.k.a. Combat Signallers or signalmen or women, are commonly employed as radio or telephone operators, relaying messages for field commanders at the front line, through a chain of command which includes field headquarters. Messages are transmitted and received via a communications infrastructure comprising fixed and mobile installations.
The Hawes Junction rail crash occurred at 5.49 am on 24 December 1910, just north of Lunds Viaduct between Hawes Junction and Aisgill on the Midland Railway's Settle and Carlisle main line in the North Riding of Yorkshire, England. It was caused when a busy signalman, Alfred Sutton, forgot about a pair of light engines waiting at his down (northbound) starting signal to return to their shed at Carlisle. They were still waiting there when the signalman set the road for the down Scotch express. When the signal cleared, the light engines set off in front of the express into the same block section. Since the light engines were travelling at low speed from a stand at Hawes Junction, and the following express was travelling at high speed, a collision was inevitable. The express caught the light engines just after Moorcock Tunnel near Aisgill summit in Mallerstang and was almost wholly derailed.
"Mugby Junction" is a set of short stories written in 1866 by Charles Dickens and collaborators Charles Collins, Amelia B. Edwards, Andrew Halliday, and Hesba Stretton. It was first published in a Christmas edition of the magazine All the Year Round. Dickens penned a majority of the issue, including the frame narrative in which "the Gentleman for Nowhere," who has spent his life cloistered in the firm Barbox Brothers & Co., makes use of his new-found freedom in retirement to explore the rail lines that connect with Mugby Junction. Dickens's collaborators each contributed an individual story to the collection.
Duddeston railway station is situated in the Duddeston area of Birmingham, England on the Redditch-Birmingham New Street-Four Oaks-Lichfield Cross-City Line and the Chase Line. Services on the Cross-City Line are usually operated by Class 323 electric multiple units, while Class 350 electric multiple units are commonly used on services to and from Walsall.
A signal lamp is a visual signaling device for optical communication by flashes of a lamp, typically using Morse code. The idea of flashing dots and dashes from a lantern was first put into practice by Captain Philip Howard Colomb, of the Royal Navy, in 1867. Colomb's design used limelight for illumination, and his original code was not the same as Morse code. During World War I, German signalers used optical Morse transmitters called Blinkgerät, with a range of up to 8 km (5 miles) at night, using red filters for undetected communications.
Absolute block signalling is a British signalling block system designed to ensure the safe operation of a railway by allowing only one train to occupy a defined section of track (block) at a time. Each block section is manually controlled by a signalman, who communicates with the other block sections via telegraph. This system was used on double or multiple lines where use of each line is assigned a direction of travel before the introduction of track circuits, and is still used on lines which lack track circuiting.
The Communications and Electronics Branch is a personnel branch of the Canadian Armed Forces (CAF). The army component of the branch is designated the Royal Canadian Corps of Signals.
The Abbots Ripton rail disaster occurred on 21 January 1876 at Abbots Ripton, then in the county of Huntingdonshire, England, on the Great Northern Railway main line, previously thought to be exemplary for railway safety. In the accident, the Special Scotch Express train from Edinburgh to London was involved in a collision, during a blizzard, with a coal train. An express travelling in the other direction then ran into the wreckage. The initial accident was caused by:
Military organization or military organisation is the structuring of the armed forces of a state so as to offer such military capability as a national defense policy may require. In some countries, paramilitary forces are included in a nation's armed forces, though not considered military. Armed forces that are not a part of military or paramilitary organizations, such as insurgent forces, often emulate military organizations, or use these structures, while formal military organization tends to use hierarchical forms.
Signalman was a U.S. Navy rating for sailors that specialized in visual communication. See Signaller for more about the roles of Signalmen.
The Glasgow Central Railway was a railway line built in Glasgow, Scotland by the Caledonian Railway, running in tunnel east to west through the city centre. It was opened in stages from 1894 and opened up new journey opportunities for passengers and enabled the Caledonian Railway to access docks and industrial locations on the north bank of the River Clyde. An intensive and popular train service was operated, but the long tunnel sections with frequent steam trains were smoky and heartily disliked.
The Dahlerau train disaster was a railway accident that occurred on May 27, 1971, in Dahlerau, a small town in Radevormwald, West Germany, in which a freight train and a passenger train collided head-on. Forty-six people perished in the accident; forty-one were senior year pupils of the Geschwister-Scholl-Schule in Radevormwald. It was the deadliest accident in West Germany since its foundation in 1949, surpassed after German reunification by the Eschede train disaster in 1998.
A signalman or signaller is an employee of a railway transport network who operates the points and signals from a signal box in order to control the movement of trains.
The Battersea Park rail crash occurred on 2 April 1937, just south of Battersea Park railway station on the Southern Railway, in London, England. Two electrically driven passenger trains collided on the Up Local line; the second train, from Coulsdon North to Victoria, had been allowed into the section while it was still occupied by the first train, from London Bridge to Victoria. The signalman at Battersea Park, G. F. Childs, believing there was a fault with the Sykes electromechanical interlocking apparatus which was installed at the box, had opened up the case of the instrument and inadvertently cleared the interlock which should have prevented this situation. The official enquiry ruled that he subsequently accepted the Coulsdon train, although he should have been aware that the London Bridge train had not cleared the section. Ten people were killed, including the guard of the London Bridge train, and eighty people were injured, seven sustaining serious injuries. Another accident had occurred at Battersea Park in 1881.
The Welwyn Tunnel rail crash took place in Welwyn North Tunnel, north of Welwyn station on the Great Northern Railway, on 9 June 1866. According to L T C Rolt, "from the point of view of damage to engines and rolling stock it was one of the most destructive in railway history."
Wigwag is an historical form of flag signaling that passes messages by waving a single flag. It differs from flag semaphore in that it uses one flag rather than two, and the symbols for each letter are represented by the motion of the flag rather than its position. The larger flag and its motion allow messages to be read over greater distances than semaphore. Messages could be sent at night using torches instead of flags.
