Does drilling with an auger spook the school? How long until they recover?
It does, briefly — ice couples sound straight into the water, and an auger is loud down there. Over shallow flats of 2–3 m (6–10 ft) a school typically tightens to bottom or slides off for 10–20 minutes; over a 10 m (33 ft) basin the disturbance is diluted and fish often keep feeding through it. The practical fix is sequencing: drill every hole you expect to need first, then fish back through them in quiet. Schools that were merely pushed usually drift back along the same grazing line they left on.
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