All boats have flags telling who they are ( that is even true today) and in the open sea it is was impossible to tell what or who the other ship was without a flag. There was no means to contact the ship you saw and no way to know who they were. The flag told the story of the ship facing you.
The Newbrunswick flag has an image of a boat on it.
A red flag.
yes!
Surrender was expeted.
jolly roger
The jolly Rodger.
To steer their boat.
Pirates were usually people on a boat who rebelled, then were corrupted by power, and wanted money.
The jolly roger.
Merchant flag: Storm the town merchants (Swashbuckler)
No, a jolly roger is a pirates flag.
penisland