Danube · km 1879.25
No depth reports available from viadonau (DoRIS).
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 17:30 the Thebnerstraßl gauge read 123 cm, 17 cm higher than 24 hours earlier. Source: viadonau (DoRIS).
Gauge Thebnerstraßl is on the Danube, at kilometre 1879.25.
At RNW 141 cm, the site uses 250 cm fairway depth and a 30 cm margin: Thebnerstraßl +79. This is a reference calculation, not a current sounding.
Depth reports: viadonau (DoRIS).
Water-level forecasts: the 2-day forecast from HD NÖ (yellow). Upstream lies Devín, downstream Bratislava.