I think OP doesn't want techno-babble, but coherent and causal interactions of everyday objects in their story.
Mary packed the binoculars in chapter 3, therefore she may use them on the train in chapter 6.
Mary packed the binoculars in chapter 3, therefore she may use them on the train in chapter 6.
And it's not technobabble. I like hard sci-fi. I don't pretend to understand every field of tech, nor do so my characters have the same expertise as me. Having an llm with knowledge of basically all fields is helpful.