sonar

Table of Contents

Introduction References & Edit History Related Topics

Images

Discover

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.

Timeline of the 2000s

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)

Falling Stars: 10 of the Most Famous Endangered Species

sonar: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Photos

See All Images →

Topics

sonobuoy acoustic communication system active sonar passive sonar sounding depth finder Hayes sonic depth finder echo sounding Fathometer Anti-Submarine Detection Investigation Committee device radar stealth Sealab beacon

Dig Deeper: More Articles That Discuss This Topic

ultrasonics: Ranging and navigating

Quiz

Yellow transportation sign with ASAP (as soon as possible) on violet color sky background. (acronyms)

Figure Out the Acronyms ASAP Vocabulary Quiz