What The Ship Will Not Say
They split the work six ways, which was how a committee of the awake was always split, because six was the number of directions a problem had when you decided to take it apart and nobody had time to do two of them. Marta went to her hydroponics bay to rerun the atmospheric numbers on deck eleven, because there were specific signatures in the CO2 cycle for how many lungs had been breathing in a given air, and Marta was the one who could read them. Tomas went to medical to prepare what he would need if Kati came up and what he would need if she did not. Ilkay and Reet went to the observation cupola, because from there, with the slow optical instruments that the ship used to hold its bearing against the receding sun, they could run a pass over the hull and look for any small asymmetry, any external artefact, any sign that the problem was not entirely interior. Anneli went to the bridge, which was a room the Kaleva's crew used mostly for sitting and thinking, and Mihkel went down into Reval's core.
Nobody went into Reval's core by choice. The core was housed inside a kilometre of radiation shielding at the thickest point of the ship's hull, a small pressurised capsule that a chief engineer could enter through a series of four keyed hatches and in which a chief engineer could, if he had to, open a service port on the shipmind's own long memory and look at the strata of what it was