Admiralty Sailing Directions: East Coast of the United States Pilot Vol. 1 (NP68), 17th Edition 2021 Gulf of Suez British Admiralty Nautical Chart 1867:

British Admiralty Nautical Chart 1867: Firth of Clyde Hunterston Channel and Rothesay Sound is a standard nautical chart

Bonny River

British Admiralty Nautical Chart  2252: Gulf of Bothnia is a standard nautical chart

Sometimes it can be seen without the blue circle and emblem

Puerto Cumarebo

Admiralty Sailing Directions: East Coast of the United States Pilot Vol. 1 (NP68), 17th Edition 2021 Gulf of Suez British Admiralty Nautical Chart 1867:East Coast of the United States Pilot Vol. I (NP 68) in the British Admiralty Sailing Directions series. It covers the east coast of the United States from Great Wass Island to Barnegat Inlet. A new or revised edition is due for publication within the coming year. About Admiralty Sailing Directions (ASD) ADMIRALTY Sailing Directions (Pilots) provide essential information to support port entry and coastal navigation for all classes of ships at sea.