Not all stock ports are empty
Scapa
Loch Ewe
Hartlepool
Southend
Dover
Portsouth
Portland
Bristol
Merthyr
Liverpool
Firth of Clyde
Firth of Forth
New York
Norfolk
Halifax
Curacao
Port of Spain
Cape Town
Gibralter
Rio
Reykjavic
All have ships in just not many
One or two in most cases
Player ports have no harbour traffic though
Stock
GWX