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Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance. A distress signal indicates that a person or group of people, watercraft, aircraft, or other vehicle is threatened by a serious or imminent danger and requires immediate assistance. [1]:
Train horns are sounded where a whistle post (marked with the letter "S" for siffler – "to whistle") is present. If the whistle post is labelled "J" (meaning jour – "day"), the horn is only to be sounded between 07:00 and 20:00. Horns must also be sounded when passing an oncoming train, and shortly before reaching the last car of the train.
The 45th car in the train derails such that it blocks the parallel second main track, into which an eastbound BNSF oil train collides. Dash 9-44CW 4934 strikes the car and almost 500,000 gallons of crude oil are released from the oil train; the oil catches fire, forcing the evacuation of 1,400 nearby residents. [27] [28]
Train #1254 was moving at 18 mph when the collision occurred. Passenger accounts on Train #1254 describe the sound of the brakes and the blaring of the train horn moments before the collision. [1] Cab Car #5146 was ripped open in the collision, killing the engineer John J. DeCurtis and a passenger aboard train #1254, Arthur David Stern.
Mayday is an emergency procedure word used internationally as a distress signal in voice-procedure radio communications.. It is used to signal a life-threatening emergency primarily by aviators and mariners, but in some countries local organizations such as firefighters, police forces, and transportation organizations also use the term.
The British Rail Derby Lightweight diesel multiple units, were the first such trains to be built en-masse for British Railways. The units were built at BR's Derby Works from 1954 to 1955. The units were built in various formations, including 12 power-twin 2-car units, 84 power-trailer 2-car units, four 4-car units, and two single car units.
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The Continuous Automatic Warning System (CAWS) is a form of cab signalling and train protection system used in Ireland to help train drivers observe and obey lineside signals. CAWS has been in use on Iarnród Éireann diesel trains since 1984. All NIR trains operating cross-border must also be fitted with CAWS.