SOS (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SOS" in English language version.

Last modified: 22:19:47, 9 August 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

1515hathitrust.org

296^th place

153^rd place

32loc.gov

63^rd place

47^th place

22uscg.gov

low place

11navy-radio.com

low place

11books.google.com

3^rd place

11web.archive.org

1^st place

11lumenauthority.com

low place

11worldradiohistory.com

127^th place

68^th place

11oceanlinersmagazine.com

low place

11ncdcr.gov

low place

8,987^th place

11radiomarine.org

low place

11itu.int

1,487^th place

1,305^th place

books.google.com (Global: 3^rd place; English: 3^rd place)

Weik, Martin (2012). Communications Standard Dictionary (3rd ed.). Springer Science & Business Media. p. 760. ISBN 9781461304296.

hathitrust.org (Global: 296^th place; English: 153^rd place)

babel.hathitrust.org

"S O S", The Sailors' Magazine and Seaman's Friend, October 1915, page 158.
"The Wireless Telegraph Conference". The Electrician: 214. 27 November 1903.
Howeth, Linwood S. (1963). "Appendix B: Final Protocol, Article IV". History of Communications-Electronics in the United States. First International Radio Telegraphic Conference, Berlin, 1903. p. 547.
Turnbull, G.E. (1913). "Distress signalling". The Yearbook of Wireless Telegraphy and Telephony. pp. 318–322.
Robison, S.S. (1906). "Codes". Manual of Wireless Telegraphy for the Use of Naval Electricians (1st ed.). p. 112.
"Regelung der Funkentelegraphie im Deutschen Reich". Elektrotechnische Zeitschrift: 413–414. 27 April 1905.
The three International Morse sequences were:
Ruhezeichen ("cease sending") ▄▄▄ ▄▄▄ ▄▄▄ ▄▄▄ ▄▄▄ ▄▄▄ , OO;

Notzeichen ("distress") ▄ ▄ ▄ ▄▄▄ ▄▄▄ ▄▄▄ ▄ ▄ ▄ , SOS; and

Suchzeichen ("calling") ▄ ▄ ▄ ▄▄▄ ▄▄▄ ▄▄▄ ▄ , SOE.
"German regulations for the control of spark telegraphy". The Electrician: 94–95. 5 May 1905.
Service Regulation XVI (Report). 1906 International Wireless Telegraph Convention. U.S. Government Printing Office. p. 38.
"The International Radio-Telegraphic Convention". Electrical World. 12 January 1907. pp. 83–84.
"'S 5 S' rivals 'C Q D' for wireless honors". Popular Mechanics. February 1910. p. 156.
"Regulations: Article II: Safety Signal", International Conference on Safety of Life at Sea, Government Printing Office, Washington, D.C., 1914, page 37.
"Distress call". International Radiotelegraph Convention. Washington, DC. 1927. p. 51 – via hathitrust.org.
"Urgent signal". International Radiotelegraph Convention. Washington, DC. 1927. p. 54 – via hathitrust.org.
"1421. Urgent Marine Information Broadcast Format", United States Coast Guard Communication Manual (CG-233), 1959 edition, page 14-3.
"1422. Safety Marine Information Broadcast Format", United States Coast Guard Communication Manual (CG-233), 1959 edition, page 14-4.

itu.int (Global: 1,487^th place; English: 1,305^th place)

"Recommendation ITU-R M.493 Digital selective-calling system for use in the maritime mobile service". itu.int. International Telecommunication Union.

loc.gov (Global: 63^rd place; English: 47^th place)

chroniclingamerica.loc.gov

"Notices". The Pacific Commercial Advertiser. 27 August 1909. Retrieved 20 August 2019.

loc.gov

"International Convention for the Safety of Life at Sea" (PDF). Library of Congress. 31 May 1929.

lumenauthority.com (Global: low place; English: low place)

"How to Signal SOS With a Flashlight [Complete Guide]". Lumen Authority. 2021-04-15. Retrieved 2021-07-07.

navy-radio.com (Global: low place; English: low place)

U.S. Navy, Bureau of Naval Personnel, Radioman 3 & 2, NAVPERS 10228-B, Washington, D.C.: U.S.G.P.O., 1957, pp. 135, 177, 402.

ncdcr.gov (Global: low place; English: 8,987^th place)

"Distress signal SOS first heard at Hatteras, 1909". ncdcr.gov (blog). 11 August 2015.

oceanlinersmagazine.com (Global: low place; English: low place)

Edwards, John (9 June 2020). "Slavonia sends an SOS". oceanlinersmagazine.com.

radiomarine.org (Global: low place; English: low place)

Jeffrey Herman (1994). "Reports from NMO - 500 kc Procedures". RadioMarine.org.

uscg.gov (Global: low place; English: low place)

navcen.uscg.gov

"Discontinuation of Morse code services in the MF radiotelegraphy band" (PDF). GMDSS. GMDSS Resolution. 10 February 1993. COM/Circ.115. Archived from the original (PDF) on 2020-06-10. Retrieved 2019-08-18.
U. S. Coast Guard, Amalgamated International and U. S. Inland Navigation Rules, Annex IV, Retrieved October 24, 2018

web.archive.org (Global: 1^st place; English: 1^st place)

"Discontinuation of Morse code services in the MF radiotelegraphy band" (PDF). GMDSS. GMDSS Resolution. 10 February 1993. COM/Circ.115. Archived from the original (PDF) on 2020-06-10. Retrieved 2019-08-18.

worldradiohistory.com (Global: 127^th place; English: 68^th place)

"Notable achievements of wireless" (PDF). Modern Electrics. September 1910. p. 315.

SOS (English Wikipedia)

books.google.com (Global: 3rd place; English: 3rd place)

hathitrust.org (Global: 296th place; English: 153rd place)

babel.hathitrust.org

itu.int (Global: 1,487th place; English: 1,305th place)

loc.gov (Global: 63rd place; English: 47th place)

chroniclingamerica.loc.gov

loc.gov

lumenauthority.com (Global: low place; English: low place)

navy-radio.com (Global: low place; English: low place)

ncdcr.gov (Global: low place; English: 8,987th place)

oceanlinersmagazine.com (Global: low place; English: low place)

radiomarine.org (Global: low place; English: low place)

uscg.gov (Global: low place; English: low place)

navcen.uscg.gov

web.archive.org (Global: 1st place; English: 1st place)

worldradiohistory.com (Global: 127th place; English: 68th place)

books.google.com (Global: 3^rd place; English: 3^rd place)

hathitrust.org (Global: 296^th place; English: 153^rd place)

itu.int (Global: 1,487^th place; English: 1,305^th place)

loc.gov (Global: 63^rd place; English: 47^th place)

ncdcr.gov (Global: low place; English: 8,987^th place)

web.archive.org (Global: 1^st place; English: 1^st place)

worldradiohistory.com (Global: 127^th place; English: 68^th place)