What it looks like
Lateral. A polygon over land or sea where hazardous activity is conducted.
Vertical. Typically surface to a defined FL; many sea ranges extend from SFC to FL245 or higher.
When it's active
Often permanent in extent but with active/inactive cycles published by NOTAM and AUP/UUP.
Treat every range as active until the NOTAM or AUP says otherwise.
What VFR pilots should do
Entry is not legally prohibited, but flying through an active danger area is unsafe. Treat sea ranges as active unless a NOTAM or AUP confirms otherwise.
Where you'll meet it
- EG D138 Holbeach
- LF D54
- ED D44
On NOTAMbriefing.com
Every European danger area is drawn from authoritative source data — Eurocontrol EAD for structure, the Network Manager B2B feeds for AUP/UUP, plus AIP and SUP for published schedules. Combined with Dynamic Airspace Mapping (DYNAM), you only see what's active today. What is DYNAM?
Related airspace types
R Restricted Area A restricted area may limit entry during active periods. GNOTAM Graphical NOTAM A graphical NOTAM has a mappable effect area, making it easier to see whether the notice affects a route, airport, or local flying area. CTR Control Zone A CTR protects controlled traffic around an aerodrome and is one of the first airspace types pilots check near departure and destination airports.