Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Dec 7, 2025.

• DiveJourney Germany country page - Internal index of Germany dive spots used for linking signature sites.
• DiveJourney spot: Walchensee, Am Hackl (VW Kaefer) - Spot reference for Bavarian alpine lake diving and mixed scuba/freedive planning.
• DGzRS (German Maritime Search and Rescue) MRCC Bremen contact summary - Official maritime emergency contact and radio guidance for MRCC Bremen.
• DAN Europe emergency call portal - 24/7 dive medical emergency contact information.
• DAN World contact page (emergency hotline) - Global emergency hotline numbers for Divers Alert Network.
• European Union ETIAS official information - Official ETIAS status and traveler guidance.
• EU revised timeline for EES and ETIAS - Official timeline noting expected ETIAS start in the last quarter of 2026.
• Lower Saxony Wadden Sea National Park visitor rules (PDF) - Protected area zoning, seasonal restrictions, and visitor behavior guidance.
• Wadden Sea World Heritage protection and management overview - High-level description of protection objectives and management approach for the Wadden Sea.
• Deutscher Wetterdienst (DWD) sea surface temperature service - Germany's national meteorological service page for sea surface temperature monitoring.
• NOAA COPEPOD: Helgoland Roads time-series overview - Long-term environmental time series used as a reference for North Sea seasonal water temperatures.