Now you can keep your boat at periscope depth all day long!
现在，您可以让您的船民在潜望镜深度一天！
At periscope depth it can be located by the enemy's reconnaissance aircraft.
在潜望镜深度它能被敌人的侦察飞机定位。
Submarine motion at the periscope depth, will suffer the interference that comes from waves.
潜艇在潜望镜深度航行时，会受到来自波浪的干扰力。
In the middle of the Atlantic ocean, with a salinity of 3.2 %, a VLF signal will penetrate down to a depth of 10-20 meter, barely periscope-depth for a modern large scale submarine.
在大西洋中部，海水的盐度为3.2%，甚低频无线电信号可以穿透到海面下10 ~20米的深度，几乎就是现代大型潜艇的潜望镜深度。
In the middle of the Atlantic ocean, with a salinity of 3.2 %, a VLF signal will penetrate down to a depth of 10-20 meter, barely periscope-depth for a modern large scale submarine.
在大西洋中部，海水的盐度为3.2%，甚低频无线电信号可以穿透到海面下10 ~20米的深度，几乎就是现代大型潜艇的潜望镜深度。
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