Danube · km 2035.98
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
Latest reading: On 27/10/2026 at 23:45 the Melk gauge read 238 cm, 18 cm higher than 24 hours earlier. Source: HD NÖ / viadonau.
Gauge Melk is on the Danube, at kilometre 2035.98.
At RNW 237 cm, the site uses 250 cm fairway depth and a 30 cm margin: Melk -17. This is a reference calculation, not a current sounding.
Depth reports: viadonau (DoRIS).
Marke I (HSW): 733 cm. Navigation may be suspended above Marke II (823 cm).
Upstream lies Ybbs, downstream Kienstock.