Submarine Operations

Submarine operations require a knowledge of the locations of fronts and eddies (see Sect. 24.2.1 above), and the general thermohaline structure of the ocean, in order to identify the best tactics for detection, attacks and evasion. The strength and direction of ocean currents is also required, for the purposes of manoeuvre. A knowledge of conditions at the surface, such as wind waves and swells, enables the risk of counter-detection to be assessed, informing decisions on whether it is safe to raise a periscope or communications mast, or to recharge batteries by 'snorting'. A knowledge of surface wind waves and precipitation is also required, in order to assess ambient noise from these sources, as this affects the performance of acoustic sensors.

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