Danube · km 1646.5
No depth reports available from Hydroinfo (OVF).
Water depth is not draught. Platform Zero Incidents cites a safety margin of 20–40 cm based on German case law, depending on the riverbed, vessel type and good seamanship. This is not a fixed legal minimum. Under-keel clearance is the space between the vessel and the bed. Dynamic squat while underway reduces that space. Viadonau gives 20–40 cm as a guide for squat. Meeting and overtaking can increase it further; MARIN describes an overtaking manoeuvre with more than 70 cm of squat. Sources: Platform Zero Incidents, CCR, German court ruling, viadonau, MARIN
On 28/10/2026 at 17:00 the Budapest gauge read 37 cm, 7 cm higher than 24 hours earlier. Source: PannonRIS (RSOE / OVF).
Gauge Budapest is on the Danube, at kilometre 1646.5.
At RNW 106 cm, the site uses 250 cm fairway depth and a 30 cm margin: Budapest +114. This is a reference calculation, not a current sounding. In practice Budapest +80 is used here, -34 cm against the official rule.
Depth reports: Hydroinfo (OVF).
Water-level forecasts: the 6-day forecast from Hydroinfo (OVF) (red) and the 6-day forecast from PannonRIS (blue). Upstream lies Óbuda, downstream Kvassay zsilip.