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AMATEUR RADIO / CONTESTING:

Danish Contest Academy

ELECTRONICS:

SAILING & THE ART OF NAVIGATION

Marinehjemmeværnet

Farvandsvæsnet

Søværnet('s Operative Kommando) - Danish Navy

Strømtrekanter

Maritime Danmark (nyheder)

Marinetraffic.com

METEROLOGY:

Surface Pressure fronts

Dansk Meterologisk Institut