Radar and Sonar!Radar and Sonar!

Eric GillEric GillJessica WebbJessica WebbLee Jin TaiLee Jin TaiRyanne GeorgeRyanne GeorgeSydney AielloSydney Aiello

SonarSonar Uses of Sonar during Uses of Sonar during

World War 2:World War 2:

- Submarine- Submarine

- Mines- Mines A sonar device will A sonar device will

send out sub-send out sub-surfaces sound surfaces sound waves and listen for waves and listen for returning echoes.returning echoes.

Sonar is a system that uses transmitted and reflected underwater sound waves to detect and locate submerged objects or measure distances underwater.

Sonar ContinuedSonar Continued

Sonar = Sonar = SoundSound NNavigation avigation AAnd nd RRanginganging

Lewis Nixon invented the first Lewis Nixon invented the first SONAR type device to help in SONAR type device to help in detecting icebergs in 1906.detecting icebergs in 1906.

Paul Langevin took his idea and Paul Langevin took his idea and applied it to detecting applied it to detecting submarines, he called it echo-submarines, he called it echo-location (like a bat).location (like a bat).

Main UseMain Use

Sonar in WWII allowed trade to be Sonar in WWII allowed trade to be re-openedre-opened

It was put on convoy ships to It was put on convoy ships to locate (German) submarines locate (German) submarines

This allowed convoys to locate This allowed convoys to locate incoming attacks on ships incoming attacks on ships allowing them to prepare for the allowing them to prepare for the attack attack

Sonar Usage TodaySonar Usage Today

Today, Sonar is used mainly for Today, Sonar is used mainly for under water searches. under water searches.

Used to find small objects Used to find small objects Sonar is used in the Medical field Sonar is used in the Medical field Sonography is used to see within Sonography is used to see within

the human bodythe human body

RadarRadar

A system for detecting the A system for detecting the presence, direction, distance, and presence, direction, distance, and speed of aircrafts, ships, and speed of aircrafts, ships, and other objects by sending out other objects by sending out pulses of high-frequency pulses of high-frequency electromagnetic waves that are electromagnetic waves that are reflected off the object back to reflected off the object back to the source. the source.

Radar: Radio Detection Radar: Radio Detection and Ranging.and Ranging.

Who and when Radar Who and when Radar was Inventedwas Invented As early as 1866, Heinrich Hertz As early as 1866, Heinrich Hertz

showed that radio waves could be showed that radio waves could be reflected from solid objects reflected from solid objects

Usage in WW2Usage in WW2

Radar was used to locate Radar was used to locate incoming enemy bomb raidsincoming enemy bomb raids

Radar was also used to map the Radar was also used to map the groundground

Radar Usage TodayRadar Usage Today

Used as Speedometers for Police Used as Speedometers for Police officers to tell how fast someone officers to tell how fast someone is going.is going.

Used in the Navy, for tracking Used in the Navy, for tracking enemies, allies, missiles, and enemies, allies, missiles, and other various objects.other various objects.