Danube · km 678
No depth reports available from APPD.
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 28/10/2026 at 06:00 the Orjahovo gauge read -124 cm, 1 cm higher than 24 hours earlier. Source: APPD.
Gauge Orjahovo is on the Danube, at kilometre 678.
At RNW 39 cm, the site uses 250 cm fairway depth and a 30 cm margin: Orjahovo +181. This is a reference calculation, not a current sounding.
Depth reports: APPD.
Water-level forecasts: the 6-day forecast from APPD (red). Upstream lies Bechet, downstream Corabia.