SYED wrote:The thing is major fleet movements in hyper are detectable.
Actually, based on earlier novels in the series, ships can only be detected by detection gear in their own dimension ie n-space or hyperspace. For example, the "hyper footprint" that system detectors pick up is only seen once the ships cross the hyper wall into normal space. If one looks back to ART, for example, Filareta notes that he *should* have left a few scouts behind in hyper to pick up the Havenite detachment; rather than having them surprise him by transiting behind him, where his sensors couldn't see them until they hit N-space. Similarly in HAE, while the Havenite cruiser could "see" Artemis and Wayfarer in hyper in front of it, it too was in hyper. And the plan for Artemis to escape was to translate down into n-space where the cruiser still in hyper wouldn't detect her.
I must admit it seems strange that if the grav stresses the impellor drive creates are FTL detectable, that they can't be detected in multiple dimensions, but so far there's no mention of that capability in any of the previous novels.
The only novels of David's that I've read where vessels going faster than light can be detected in normal space were the Dahak series and the Fury series, neither of which is set in the Honorverse.