The control room was silent and Chernavin suppressed the adrenalin that coursed through his body. Drilled into him as a submariner at a moment like this was the need to stay ruthlessly calm, to calculate the odds like a mathematician or a five-dimensional chess player. There was no other way, if he and his crew were to first succeed and then survive. In a moment he would chance a look through the smaller attack periscope, but now was the time to compute and anticipate the surface picture, to visualize what was happening on the sea above them and to prioritize what he needed to see. Then, when he raised the periscope above the surface, he would know in advance what he wanted to look at. Minimizing the time the periscope poked its tiny head above the waves was the best way of limiting the chance of being spotted by the radars, or the keen eyes of the enemy lookouts.

If he was now hesitating, it was because Krasnokamensk was within close torpedo range of something very much larger than anything Chernavin had ever contacted before, even in training against the biggest ships in the Russian fleet. A well-trained Russian submarine sonar operator would usually have added the type and class of ship, perhaps even its name, logged as a result of the detailed data built up over many years of monitoring NATO exercises and studying the specific noise signatures of different ships. But Queen Elizabeth was so new on the scene that no one had yet logged her characteristics.

If I screw up now, the Navy won’t forgive me after all the time and effort they’ve spent on training me.

Chernavin was a realist, a product of his upbringing as the son of an agricultural worker on a collective farm near Moscow. However, for a moment, he felt a sense of destiny. It was as he had read in novels; that everything in his life had somehow been designed to bring him to this point. Chernavin had excelled at school, particularly at mathematics and physics, and been selected for officer training in the Russian Navy in the dark days after the collapse of the Soviet Union. He had first served in the Northern Fleet, when Murmansk had been full of rusting submarine hulks, the detritus of a once-proud navy and a source of shame to those who operated them. However, times had thankfully changed and Russia had rediscovered her pride under the President, under whose personal direction her navy was being re-equipped.