“机敏”级潜艇在全世界的海域中巡逻，而且被水面舰艇和其他潜艇探测到的几率非常小。
The Astute submarines will patrol the world's oceans with minimum risk of being detected by surface ships and other submarines.
"这项技术被发明之后，武器设计者将其改造用来探测潜艇只是时间早晚的问题。
After this technique had been invented, it was only a matter of time before weapons designers adapted it for the detection of submarines.
当潜艇指挥官使用潜望镜对海面态势进行评估的时候最容易被探测到也最容易被攻击。
Submarines are most vulnerable to detection when the submarine commander USES a periscope to assess the situation on the surface.
要接收高频信息，只有提高传输速率，但这样潜艇很容易被探测到。
To receive high frequencies, which can boost the data rate, submarines have to surface and risk detection.
潜艇在海底只待了不到20分钟，在那之后，人们只用无人驾驶的潜艇再次探测过那里。
The vessel spent barely 20 minutes on the ocean floor, and only unmanned vessels have been back since.
由于受探测手段的限制，水下潜艇对空中目标的威胁评估一直是研究难题。
Limited from detecting means, the threat estimation on air targets is a difficult problem to submarine underwater.
滨州舰可单独或者协同海军其他兵力攻击敌水面舰艇、潜艇，具有较强的警戒探测和综合作战能力。
The frigate can attack surface warships and submarines alone or together with other forces of the PLA Navy. It also has strong capabilities of guard, detection and combat.
伊朗称Ghadir为隐形潜艇，难以通过声纳探测，目的在于浅水水域的沿岸作战，特别是在海湾地区。
Iran has described the Ghadir as stealth submarines, hardly detectable by sonar and aimed at coastal operations in shallow waters, notably in the Gulf.
而中国方面则称，“无瑕号”是在执行侦查任务，其中一项就是探测中国潜艇，而海南是中国潜艇基地的大本营。
The Chinese say the Impeccable was on a spy mission. Detecting submarines is indeed one of her roles, and Hainan is home to Chinese submarine bases.
机载激光海洋测深系统对快速而便宜地绘制沿海海图和探测潜艇有重要意义。
An airborne laser sounder bathymetric system is of great importance to chart coastal bathymetry rapidly and cheaply and to detect submarines.
声呐是潜艇重要的探测设备。
并根据热尾流与周围海水的平均温度差计算出红外探测器对潜艇热尾流的作用距离。
According to the difference in temperature between thermal wake and seawater, the operation range of the detector to thermal wake was calculated.
为了提高水下潜艇对抗反潜直升机的能力，需要尽快解决水下对空探测的技术问题。
Therefore, development of a technology for the submarine to detect the anti-submarine helicopter by monitoring the helicopter radiated noise in underwater is urgently required.
随着低噪声安静型潜艇的出现，传统的水下目标探测手段面临着挑战。
Along with the appearance of the low noise peaceful submarine, the traditional undersea detection methods face the new challenge.
卡- 27装有用于导航、探测水面潜艇及通信天线的雷达系统。
For navigation and to detecting surfaced submarines and responder beacons, a radar system is equipped.
随着水声探测潜艇的手段和方法以及带有声制导的水下武器的不断完善，对潜艇的声学性能的要求越来越高。
With the progressive development of underwater acoustic detection and acoustic-guided weapons, more advanced requirements are imposed upon the acoustic properties of submarines.
随着潜艇消噪声技术的不断提高，迫切需要研制灵敏度极高的探测器对其进行远距离定位，光纤水听器的问世正是适应了这一要求。
With the improvement of the technology for submarine to eliminate noise, it is urgently to find out a kind of sensor with high sensitivity to orient submarine from long distance.
结合潜艇利用跃变层规避主动声纳探测的战术背景，对跃变层对主动声纳的搜潜概率影响进行了研究。
The effects of thermoclines depth, thickness and sound velocity change on searching submarine probability were discussed, and lastly.
伯努利“水丘”、开尔文尾流、涡尾迹、内波尾迹都起源于潜艇水动力学，对于潜艇的非声探测具有重要的应用意义。
The Bernoulli hump, Kelvin wake, vortex wake and internal wave wake, etc. are generated, as the submarine moves in the ocean. These wake signatures may be used in remote sensing of submarine.
伯努利“水丘”、开尔文尾流、涡尾迹、内波尾迹都起源于潜艇水动力学，对于潜艇的非声探测具有重要的应用意义。
The Bernoulli hump, Kelvin wake, vortex wake and internal wave wake, etc. are generated, as the submarine moves in the ocean. These wake signatures may be used in remote sensing of submarine.
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