Spoiler: Hannabel and Anika
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Duplicating the auspex settings turned up another transmitter, in another of the locations the ship had marked. This one was identical to the first, down to the type of explosive charge concealed within it. Once she knew that, Hannabel was able to find the rest easily enough. There were a total of five, spread in various locations around the ship, and all apparently intended to be autonomous. Rather than one transmitter being moved around, they had a series of planted devices that required no additional upkeep. All of them were jet black, and all of them were set to detonate if tampered with.

The ship didn't have anyone who was an explosives expert, per se, but as with any ship big enough, there were people with the skill required.