Free tool · Binnacle Passage

Tidal Window Calculator

Live NOAA tide predictions for a station, against a vessel's draft and required clearance — so you can see the window when there's enough water to transit. All depths in feet (MLLW).

NOAA stationCommon pilotage stations — or type any NOAA id below

Station id

Date

Charted depth (ft)

Draft (ft)

Req. UKC (ft)

Find your station on NOAA →

Pick a station, date, and the vessel's draft, then run it. The tool pulls real hourly NOAA predictions and shows when the depth supports the transit.

Assumes charted soundings to MLLW (US charts). Estimate only — does not include squat, surge, or datum uncertainty. Confirm against official sources and the pilot's judgment.

Binnacle Passage puts the tidal window and current-aware ETA on the dispatch board next to the live vessel list — so the desk times the boat to the water, not a guess.

Binnacle Passage for pilots →Timing the transit