I've sailed the Baltic Sea numerous time since 1967. It is a Sea, Lake, or Bay, depending of who you are talking with, with great and very complex history. All those wrecks found so far , probably only 1/1000th of what's there, are because of trading and all of the wars fought since the Roman times. Because of the make up of this sea, historically it is a treasure unequaled anywhere in the world.
According to the International Hydrographic Organizations "Limits Of Oceans And Seas", the Baltic Sea is bordered by the coasts of Denmark, Sweden, Finland, Russia, Estonia, Latvia, Lithuania, Poland and Germany and extends north-eastwards of the following limits:
In the Little Belt (Dansih Waters): A line joining Falshøft 54° 47' N, 9° 57',5 E and Vejnæs Nakke, Ærø 54° 49' N, 10° 26' E.
In the Great Belt (Danish Waters): A Line Joining Gulstav (South Extreme of Langeland Island) and Kappel Kirke 54° 46' N, 11° 01' E on the Island of Lolland.
In Guldborg Sound (Dansih Waters): A Line joining Flinthorne Rev and Skjelby 54° 38' N, 11° 53' E.
In the Sound Øresund (Danish and Swedish Waters): A Line Joining Stevns Lighthouse 55° 17' N, 12° 27' E and Falsterbo Point 55° 23' N, 12° 49' E.
Baltic Sea is a sub division of the North Atlantic.
Sub divisions under the Baltic Sea are:
Gulf of Bothnia
Gulf of Finland
Gulf of Riga
Baltic Sea is not a lake.
Temperatures of the Baltic Sea can be from 0°C/partly frozen to somewhere in the 20's°C.
The Baltic Seas has been suffering from a lot of alga over the last decade.
A lot of wars have been fought in the Baltic Sea.
Significant for the Baltic Sea and partially the North Sea (also part of the North Atlantic) and surrounding waters is the Hanse Federation from ~1100 to ~1600 AD.
This was a very early trade federation and they developped ability to communicate over long distances between the cities of the Hanse Federation by means of fires.
As Denmark is said to have been the inventor of the sailing ship and Denmark, Sweden and Holland historical have been the all time greatest sailing nations, the control of the waters within the Hanse Federation was extreme.
My guess is that a lot of wrecks; a lot more than normal, ended up on the bottom due to wars and the Hanse federation.
"dolph"