Share
VIDEOS 1 TO 50
Rihanna - SOS
Rihanna - SOS
Published: 2009/10/07
Channel: RihannaVEVO
ATTACK OF THE NASTY PLAGUE BUGS! | SOS The Ultimate Escape #9 Survival Multiplayer (Alpha)
ATTACK OF THE NASTY PLAGUE BUGS! | SOS The Ultimate Escape #9 Survival Multiplayer (Alpha)
Published: 2017/10/01
Channel: Ohmwrecker / Maskedgamer
Indila - S.O.S
Indila - S.O.S
Published: 2014/06/27
Channel: IndilaVEVO
Abba - SOS
Abba - SOS
Published: 2009/10/08
Channel: AbbaVEVO
MAD RUSH FOR THE CHOPPER! | SOS #1 Survival Multiplayer Gameplay Ft. Delirious, Randoms
MAD RUSH FOR THE CHOPPER! | SOS #1 Survival Multiplayer Gameplay Ft. Delirious, Randoms
Published: 2017/06/27
Channel: Ohmwrecker / Maskedgamer
SOS: The Ultimate Escape - Delirious
SOS: The Ultimate Escape - Delirious' Island Adventure! (Where's Ohmwrecker?)
Published: 2017/06/27
Channel: H2ODelirious
CAN WE SURVIVE? | SOS: The Ultimate Escape (w/ H2O Delirious & Ohmwrecker)
CAN WE SURVIVE? | SOS: The Ultimate Escape (w/ H2O Delirious & Ohmwrecker)
Published: 2017/06/28
Channel: CaRtOoNz
PURE CHAOS AT THE CHOPPER! | SOS The Ultimate Escape #12 Survival Multiplayer (Alpha)
PURE CHAOS AT THE CHOPPER! | SOS The Ultimate Escape #12 Survival Multiplayer (Alpha)
Published: 2017/12/11
Channel: Ohmwrecker / Maskedgamer
Sherwood Marty - S.O.S (Music Video)
Sherwood Marty - S.O.S (Music Video)
Published: 2017/09/22
Channel: ThirtyVisuals
Jonas Brothers - S.O.S.
Jonas Brothers - S.O.S.
Published: 2013/03/29
Channel: JonasBrothersVEVO
COMO VENCER NO SOS SOZINHO! SOU GOD DEMAIS!
COMO VENCER NO SOS SOZINHO! SOU GOD DEMAIS!
Published: 2017/12/16
Channel: Patife
S.O.S. Band - Take Your Time (Do It Right)
S.O.S. Band - Take Your Time (Do It Right)
Published: 2009/11/20
Channel: fuerbeideohren1
SOS: The Ultimate Escape — First Look — My First Win!?
SOS: The Ultimate Escape — First Look — My First Win!?
Published: 2017/06/27
Channel: PsiSyn
SOS
SOS
Published: 2017/01/26
Channel: Rihanna - Topic
SOS Milla : Invitée Manon Marsault - Episode 20 !
SOS Milla : Invitée Manon Marsault - Episode 20 !
Published: 2017/12/15
Channel: Non Stop Reality
#33 SOS - 10000
#33 SOS - 10000
Published: 2017/04/17
Channel: SOS
Rihanna - SOS - Lyrics
Rihanna - SOS - Lyrics
Published: 2009/11/27
Channel: alex
SOS Milla : Invitée Manon Marsault - Episode 19 !
SOS Milla : Invitée Manon Marsault - Episode 19 !
Published: 2017/12/14
Channel: Non Stop Reality
CAN I SURVIVE THE ISLAND?!? | SOS (ft. H2O Delirious)
CAN I SURVIVE THE ISLAND?!? | SOS (ft. H2O Delirious)
Published: 2017/06/29
Channel: Bryce Games
SOS Bros React - My Hero Academia Season 2 Episode 25 - Tomura Shigaraki: Origin Story
SOS Bros React - My Hero Academia Season 2 Episode 25 - Tomura Shigaraki: Origin Story
Published: 2017/12/15
Channel: Semblance of Sanity
SOS - 16 ударенных ребят против монстров
SOS - 16 ударенных ребят против монстров
Published: 2017/12/16
Channel: МИР ММО ИГР
SOS - хайп шоу на острове монстров
SOS - хайп шоу на острове монстров
Published: 2017/12/14
Channel: МИР ММО ИГР
SOS Sinh tồn đảo tử thần #1: 16 người lên đảo, chỉ 3 người được sống!
SOS Sinh tồn đảo tử thần #1: 16 người lên đảo, chỉ 3 người được sống!
Published: 2017/12/13
Channel: Trực Tiếp Game
The S.O.S Band - Greatest Hits [2004]  Full Album
The S.O.S Band - Greatest Hits [2004] Full Album
Published: 2014/09/11
Channel: Luis Andrés Mendoza
Joseph - SOS (Overboard) (Official Music Video)
Joseph - SOS (Overboard) (Official Music Video)
Published: 2016/08/02
Channel: JosephVEVO
Durísimo cruce entre Massa y Pablo Duggan: "Sos un mentiroso"
Durísimo cruce entre Massa y Pablo Duggan: "Sos un mentiroso"
Published: 2017/12/14
Channel: Noticias en Red
Two Girls, One White Knight - SOS Survival - Funny Moments
Two Girls, One White Knight - SOS Survival - Funny Moments
Published: 2017/12/14
Channel: Litomatoma
FAÇA SUAS ROUPAS TUMBLR ♥ AMIGO SECRETO DIY
FAÇA SUAS ROUPAS TUMBLR ♥ AMIGO SECRETO DIY
Published: 2017/12/15
Channel: SOS DEBB
Raffi Ahmad Tega Ngatain Igun Kayak Paus Terdampar Wkwkwkw - Rep Sos 16 Desember 2017
Raffi Ahmad Tega Ngatain Igun Kayak Paus Terdampar Wkwkwkw - Rep Sos 16 Desember 2017
Published: 2017/12/16
Channel: Iwak Bandeng
S.O.S. Band - No One`s Gonna Love You
S.O.S. Band - No One`s Gonna Love You
Published: 2009/11/21
Channel: fuerbeideohren1
SOS Missione Tata
SOS Missione Tata
Published: 2017/12/16
Channel: I Termosifoni - Live Twitch
Выживает сильнейший - SOS
Выживает сильнейший - SOS
Published: 2017/12/15
Channel: МИР ММО ИГР
Dr.Disrespect escaped to the island with Forsen OMEGALUL #16 (SOS, PUBG, Hand Simulator)
Dr.Disrespect escaped to the island with Forsen OMEGALUL #16 (SOS, PUBG, Hand Simulator)
Published: 2017/12/16
Channel: Cyber Space
Tenso cruce entra Sergio Massa contra Pablo Duggan: "sos un mentiroso"
Tenso cruce entra Sergio Massa contra Pablo Duggan: "sos un mentiroso"
Published: 2017/12/15
Channel: Picadillo TV
เมื่อแอสซาซินทั้ง 5 มารวมกัน - ROV
เมื่อแอสซาซินทั้ง 5 มารวมกัน - ROV
Published: 2017/12/15
Channel: SOS Channel
ABBA : SOS (American Bandstand
ABBA : SOS (American Bandstand '75)
Published: 2012/01/21
Channel: 2Shaymcn
(Early Access) SOS - The Ultimate Escape - Game Society
(Early Access) SOS - The Ultimate Escape - Game Society
Published: 2017/06/24
Channel: Game Society
SOS Milla : Invitée Manon Marsault - Episode 18 !
SOS Milla : Invitée Manon Marsault - Episode 18 !
Published: 2017/12/13
Channel: Non Stop Reality
#35 SOS - յաթաղան
#35 SOS - յաթաղան
Published: 2017/05/15
Channel: SOS
緊急SOS!史上最大の池に異常発生!怪物1万匹!?池の水ぜんぶ抜く大作戦5  2017年11月26日 171126
緊急SOS!史上最大の池に異常発生!怪物1万匹!?池の水ぜんぶ抜く大作戦5 2017年11月26日 171126
Published: 2017/11/26
Channel: Johnathan Bearden
Sos za tjesteninu - jednostavan, jeftin i ukusan
Sos za tjesteninu - jednostavan, jeftin i ukusan
Published: 2017/12/16
Channel: Moja mala kuhinja
S.O.S FIESTAS: ¡3 PASOS PARA SALVAR TU ROSTRO DE LA NOCHE A LA MAÑANA!
S.O.S FIESTAS: ¡3 PASOS PARA SALVAR TU ROSTRO DE LA NOCHE A LA MAÑANA!
Published: 2017/12/15
Channel: JiniChannel
HUNGER GAMES SURVIVAL CON I MOSTRI! (SOS ITA Gameplay Funny Moments)
HUNGER GAMES SURVIVAL CON I MOSTRI! (SOS ITA Gameplay Funny Moments)
Published: 2017/12/15
Channel: Phanto90
"KAMTIS ID" #SOS (Eps 148)
"KAMTIS ID" #SOS (Eps 148)
Published: 2017/12/14
Channel: Endank Soekamti
Masteri - SOS
Masteri - SOS
Published: 2017/11/19
Channel: Masteri
SOS - HAYATTA KALMA CHALLENGE
SOS - HAYATTA KALMA CHALLENGE
Published: 2017/12/14
Channel: TEASY
#37 SOS - նառկոմանիա
#37 SOS - նառկոմանիա
Published: 2017/07/02
Channel: SOS
S.O.S. Band - Just Be Good To Me
S.O.S. Band - Just Be Good To Me
Published: 2009/11/21
Channel: fuerbeideohren1
HIRO - S.O.S | OFFICIAL MUSIC VIDEO |
HIRO - S.O.S | OFFICIAL MUSIC VIDEO |
Published: 2017/06/14
Channel: MONEY MAKER RECORDS
#18 SOS - հեղափոխություն
#18 SOS - հեղափոխություն
Published: 2016/07/27
Channel: SOS
NEXT
GO TO RESULTS [51 .. 100]

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to: navigation, search

SOS is the International Morse code distress signal (▄▄▄▄▄▄▄▄▄▄▄). This distress signal was first adopted by the German government radio regulations effective April 1, 1905, and became the worldwide standard under the second International Radiotelegraphic Convention, which was signed on November 3, 1906, and became effective on July 1, 1908. SOS remained the maritime radio distress signal until 1999, when it was replaced by the Global Maritime Distress and Safety System.[1] SOS is still recognized as a visual distress signal.[2]

The SOS distress signal is a continuous spaceless sequence of three dots, three dashes, and three dots. In International Morse Code, three dots form the letter S, and three dashes make the letter O, so "SOS" became an easy way to remember the order of the dots and dashes. In modern terminology, SOS is a Morse "procedural signal" or "prosign",[3] and the formal way to write it is with a bar above the letters: SOS.

In popular usage, SOS became associated with such phrases as "Save our Souls". SOS is only one of several ways that the combination could have been written; VTB, for example, would produce exactly the same sound, but SOS was chosen to describe this combination. SOS is the only nine-element signal in Morse code, making it more easily recognizable, as no other symbol uses more than eight elements.

Formalization[edit]

The use of the SOS signal was first introduced in Germany as part of a set of national radio regulations, effective April 1, 1905. These regulations introduced three new Morse code sequences, including the SOS distress signal.

In 1906, at the second International Radiotelegraphic Convention in Berlin, an extensive collection of Service Regulations was developed to supplement the main agreement, which was signed on November 3, 1906, becoming effective on July 1, 1908. Article XVI of the regulations adopted Germany's Notzeichen (distress signal) as the international standard, reading: "Ships in distress shall use the following signal: ▄▄▄▄▄▄▄▄▄▄▄ repeated at brief intervals". The first ship to transmit an SOS distress call appears to have been either the Cunard liner RMS Slavonia on June 10, 1909, according to "Notable Achievements of Wireless" in the September, 1910 Modern Electrics, or the steamer SS Arapahoe on August 11, 1909.[4] The signal of the Arapahoe was received by the United Wireless Telegraph Company station at Hatteras, North Carolina, and forwarded to the steamer company's offices.[5] However, there was some resistance among the Marconi operators to the adoption of the new signal, and, as late as the April 1912 sinking of the RMS Titanic, the ship's Marconi operators intermixed CQD and SOS distress calls. However, in the interests of consistency and water safety, the use of CQD appears to have died out thereafter.

In both the April 1, 1905, German law, and the 1906 International regulations, the distress signal was specified as a continuous Morse code sequence of three-dots/three-dashes/three-dots, with no mention of any alphabetic equivalents. However, in International Morse, three dots comprise the letter S, and three dashes the letter O. It therefore soon became common to refer to the distress signal as "SOS". An early report on "The International Radio-Telegraphic Convention" in the January 12, 1907, Electrical World stated that "Vessels in distress use the special signal, SOS, repeated at short intervals." (In American Morse code, which was used by many coastal ships in the United States through the first part of the twentieth century, three dashes stood for the numeral "5", so in a few cases the distress signal was informally referred to as "S5S".)

In contrast to CQD, which was sent as three separate letters with spaces between each letter, the SOS distress call has always been transmitted as a continuous sequence of dits and dahs, and not as individual letters. There was no problem as long as operators were aware that "SOS" was technically just a convenient way for remembering the proper sequence of the distress signal's total of nine dits and dahs. In later years, the number of special Morse symbols increased. In order to designate the proper sequence of dits and dahs for a long special symbol, the standard practice is to list alphabetic characters that contain the same dits and dahs in the same order, with a bar atop the character sequence to indicate that there should not be any internal spaces in the transmission.[citation needed] Thus, under the modern notation, the distress signal becomes SOS. (In International Morse Code,[citation needed] VTB, IJS, VGI, and SMB, among others, would also correctly translate into the ▄▄▄▄▄▄▄▄▄▄▄ distress call sequence, but traditionally only SOS is used.)

It has also sometimes been used as a visual distress signal, consisting of three short, three long, and three more short flashes of light, such as from a survival mirror, or with "SOS" spelled out in individual letters (for example, stamped in a snowbank or formed out of logs on a beach). The fact that SOS can be read right side up as well as upside down (as an ambigram) became important for visual recognition if viewed from above.

Later developments[edit]

Additional warning and distress signals followed the introduction of SOS. On January 20, 1914, the London International Convention on Safety of Life at Sea adopted the Morse code signal TTT (▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄), three letter Ts (▄▄▄▄▄) spaced correctly as three letters so as not to be confused with the letter O (▄▄▄▄▄▄▄▄▄▄▄), as the "Safety Signal", used for messages to ships "involving safety of navigation and being of an urgent character".

With the development of audio radio transmitters, there was a need for a spoken distress phrase, and "Mayday" was adopted by the 1927 International Radio Convention as the equivalent of SOS. For TTT, the equivalent audio signal is "Sécurité" for navigational safety. It is interesting to note that "Mayday" actually originated as the French m'aidez ("help me") and that there is a third, lesser distress call (before securité and after Mayday): "panne" (French for "breakdown"), spelled "pan" in English. French was the international language at the time that these were formalized.

During World War II, additional codes were employed to include immediate details about attacks by enemy vessels, especially in the Battle of the Atlantic. The signal SSS signaled attacked by submarines, while RRR warned of an attack by a surface raider, QQQ warned of an unknown raider (usually an auxiliary cruiser), and AAA indicated an attack by aircraft. They were usually sent in conjunction with the SOS distress code. All of these codes later switched from three repeats of the letter to four repeats, e.g., "RRRR".

None of these signals were used on their own. Sending SOS as well as other warning signals (TTT, XXX etc.) used similar procedures for effectiveness. These were always followed correctly. Here is an example of an SOS signal; the portions in parentheses are an explanation only.

SOS SOS SOS (urgent distress call follows) DE (from) GBTT GBTT GBTT (call sign of the Queen Elizabeth 2 radio room, repeated 3 times) QUEEN ELIZABETH 2 (name of ship) PSN (position is) 49.06.30 N (north), 04.30.20 W (west). (Ship is) ON FIRE, (crew) ABANDONING SHIP AR (end of transmission) K (reply, anyone)

Ships and coastal stations would normally have required quiet times twice an hour to listen for priority signals. However, many merchant vessels carried only one or two radio operators, in which case the SOS may not be heard by operators off duty. Eventually, equipment was invented to summon off-duty operators by ringing an alarm in the operator's berth. This was triggered by the operator of the ship in distress transmitting twelve long dashes of four seconds duration each. These were sent prior to the SOS in the hope of ringing the automatic alarm in ships so equipped. If possible, a short delay was given before transmission of the SOS proper. This was to give those off-watch operators time to get to their radio room.

Historical SOS calls[edit]

See also[edit]

References[edit]

  1. ^ "GMDSS Resolution COM/Circ.115 "Discontinuation of morse code services in the MF radiotelegraphy band" 10.02.93". GMDSS. Retrieved 2008-07-02. 
  2. ^ US Coast Guard Visual Distress Signals
  3. ^ Weik, Martin (2012). Communications Standard Dictionary (3rd ed.). Springer Science & Business Media. p. 760. ISBN 9781461304296. Retrieved 9 September 2015. 
  4. ^ Kemp, Peter Kemp (1976). The Oxford companion to ships & the sea. Oxford University Press. p. 249. Retrieved 10 August 2011. 
  5. ^ "STEAMER ARAPAHOE BREAKS SHAFT AT SEA". The New York Times. August 11, 1909. Retrieved 10 August 2011. 

Further reading[edit]

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license