Seeing 0.18 deg/hr drift on the north-seeking gyro set on the 1200 level near the east return; resection closure stays under 12 mm over a 400 m traverse, but backsight azimuth shifts 0.05 to 0.07 deg between stations. For weekly development and oreline mapping, is that within tolerance or should I add a second 2-minute settle and shift 10 m off the ventilation to stabilize it?
or should I add a second 2-minute settle and shift 10 m off the ventilation to Yes, and your 12 mm/400 m is fine for weekly dev, but the one thing that tightened our azimuths was hanging a 5–10 kg sandbag off the tripod — dropped backsight deltas from about 0.06° to about 0.02°; are you on wood legs?
Short answer from my side: I’m seeing the same pattern — one concrete thing that helped was writing down the exact handoff and timebox it to 15–20 min. Does that match what you’re running into?