Timeline:
• 1490, Leonardo Da Vinci records sonar use by
humans.
• 1822, Daniel Colloden used a bell to find the speed of sound underwater in Switzerland.
• 1906, Lewis Nixon invents the first sonar listening device to detect icebergs.
• 1915, Paul Langévin invented the first sonar machine for detecting submarines.
• 1918, both Britain and the U.S have active Sonar systems.
• 1822, Daniel Colloden used a bell to find the speed of sound underwater in Switzerland.
• 1906, Lewis Nixon invents the first sonar listening device to detect icebergs.
• 1915, Paul Langévin invented the first sonar machine for detecting submarines.
• 1918, both Britain and the U.S have active Sonar systems.