We have little information on the Columbia diving scene. It is likely that what dive sites are here will be in fair to good condition. Accessing them will be challenging, the waters in the Baltic sea are not for the amateur nor fainthearted.
It is likely that the dive sites will be fairy quiet.
Denmark is the home of no diving organisations.
Denmark being a temperate country and close to the sea gets a fair lashing of rain. Cold winters and warm summers.
The trend for diving in Denmark is CMAS.
Hyperbaric Chambers are available in Denmark.