Observation logs

Field records from inshore tidal stations, updated each season.

Spring tide series — northern stations

Gauge readings taken at three-hour intervals across seven northern inshore stations. Anomalous high-water events noted at two sites; cross-referenced against surge records from the autumn coastal low. Data supplied to Lumen Atlas for chart annotation.

Gauge calibration log

Annual recalibration of eastern reach instruments. Reference datum verified against national tide gauge network. Corrections applied and archived. Results inform the approach depths published by Lumen Survey.

Surge event data

Water-level records captured during an autumn coastal low. Storm setup measured at four locations; drying-height corrections pending further analysis before submission to the Atlas. Expected to appear in the next issue of Lumen Press.

Methodology note

All records use mean low water springs as chart datum. Observations are logged automatically and reviewed manually before archiving. Queries and corrections welcomed by email at tides@harbor-lumen.com.