The National Geographic Magazine, Volume 102National Geographic Society, 1952 - Geography Indexes kept up to date with supplements. |
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Page 627
Our Navy's Long Submarine Arm The National Geographic Magazine 629 A Navy Helicopter , Stalking. the world , a huge , silolike escape - training tank filled with 100 feet of water . On each submarine there are two escape hatches , one at ...
Our Navy's Long Submarine Arm The National Geographic Magazine 629 A Navy Helicopter , Stalking. the world , a huge , silolike escape - training tank filled with 100 feet of water . On each submarine there are two escape hatches , one at ...
Page 634
... submarine's metal hull . Like radar , all these devices have certain range limitations . That's one reason why hunting down a submarine remains a large- scale undertaking and a matter of teamwork . The research center for ASW techniques ...
... submarine's metal hull . Like radar , all these devices have certain range limitations . That's one reason why hunting down a submarine remains a large- scale undertaking and a matter of teamwork . The research center for ASW techniques ...
Page 635
... submarine and ASW forces . It can be set to " home in " on a submarine . The second development is a new use for sonar . Scientists have developed a compact listening device which helicopters and blimps , hovering above the sea , can ...
... submarine and ASW forces . It can be set to " home in " on a submarine . The second development is a new use for sonar . Scientists have developed a compact listening device which helicopters and blimps , hovering above the sea , can ...
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