Sources · Country Guide
Denmark
Cold-water walls, Baltic wrecks and shallow marine trails between two seas
Research Sources
Destination Guide Sources For Denmark
Reference links used to build and maintain this guide.
34 sources • Updated Nov 8, 2026
Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Nov 8, 2026.
- DiveJourney Denmark destination catalog - Live public catalog checked on 2026-11-08 via the DiveJourney public discovery service; all three Danish destination slugs returned.
- DiveJourney Bornholm guide - Country DK, canonical English destination confirmed in public discovery and guide data.
- DiveJourney Little Belt guide - Country DK, canonical English destination confirmed in public discovery and guide data.
- DiveJourney Oresund and North Zealand guide - Country DK, canonical English destination confirmed in public discovery and guide data.
- VisitDenmark official Little Belt profile - Strait current, wildlife, coastal nature and water activities.
- VisitFredericia Trelde Naes snorkel trail - Official marked trail, six stops, beginner status, depth and no-permit guidance.
- VisitDenmark Middelfart snorkel trail - Separate shallow marked snorkel trail and access.
- VisitDenmark Sobadet experienced-diver trail - Experienced scuba-only interpretation route and depth.
- VisitDenmark Marsvinet novice-diver trail - Shallow scuba trail, marine life, beginner suitability.
- VisitMiddelfart air cylinder filling - Air-fill logistics and published price example; reconfirm with supplier.
- VisitFredericia marine and navigation conditions - Current and Little Belt nature-park porpoise conduct.
- VisitDenmark Bornholm diving operator - Evidence for actual island diving instruction and local guide services.
- Bornholm official tourism, island air routes - DAT domestic service and airport access.
- Bornholm Airport technical and transport data - Confirmed RNN/EKRN and approximate Ronne distance.
- Bornholmslinjen ferry service - Bornholm to Ystad, Koge and Sassnitz ferry-route overview.
- Oresund Aquarium guided snorkeling - Summer snorkel safari, participant requirements, published price and current no-date warning.
- Oresund Aquarium seasonal wildlife outings - Porpoise, seal and tuna surface boat programs and seasonality.
- DMI English marine forecast - Official region-by-region Danish marine weather forecasts.
- DMI ocean current and wave models - Public coastal currents, water, waves and model limitations.
- Danish Maritime Authority recreational water-navigation rules - English translation of navigation order, including section 16 restricted areas and section 17 shore-scuba Alpha flags; Danish legal original controls.
- Danish Agency for Culture, Submarine Heritage - Protection of underwater archaeology older than 100 years and certain younger wrecks.
- Danish Maritime Authority, souvenir retrieval - Permission requirements for retrieval of wreck artifacts.
- Christianso official island conservation rules - Protected Ertholmene waters and April 1 to June 15 nesting restrictions.
- EU Commission, non-EU Schengen entry - Passport validity and ordinary short-stay conditions.
- European Union ETIAS official FAQ - As checked 2026-11-08, ETIAS was not accepting applications.
- Danish Police emergency 112 - Official Denmark acute emergency number.
- Rigshospitalet hyperbaric department - Hospital service confirms hyperbaric chamber availability within Danish hospital system.
- DAN emergency assistance - Diving injury first-response and 24-hour DAN number.
- European Environment Agency bathing water viewer - Denmark coastal and inland bathing water monitoring; current municipality alerts still needed.
- Electrical Safety First, Denmark electricity - 230V, 50Hz and European plus Danish type K plugs.
- VisitDenmark travel planning FAQ - Currency, health contacts, basic travel and service conventions.
- Nature Agency permits on state-owned land - Commercial activity and specific equipment may require permits.
- VisitMiddelfart Bridgewalking - Guided walking experience and participant restrictions.
- Country hero photo by Daniel J. Schwarz - Unsplash License. Photographer profile: https://unsplash.com/@danieljschwarz | Location: Denmark