Oddities discovered at sea/on charts?

[SV DestinyAscen]

Pardon the ramblings of an old man - I'm organizing old charts and logs for my daughter and future generations and found an old chart we have from the south china sea. A marked mine field off the southern coast of a Vietnamese island (Hon Tranh).

What sort of oddities have you discovered?

[StuM]

In a similar vein. Annotation on current charts here:
"FORMER MINED AREA - The approaches to Port Moresby have been swept and are open to surface navigation only. They are not safe for anchoring, trawling, bottoming of submarines or seabed activites"

[JPA Cate]

There's a spot near Raoul Is. (New Zealand waters) where the chart said something along the lines of "bottom rises and subsides approximately 20 ft." There is a nearby source of vulcanism.

Ann

[Hydra]

In N Brittany too, the chart mentions former mined areas.

When Navionics scanned the French paper charts of S Brittany, they failed to notice that a small text did not refer to the name of a place but to the tide: "marée semi-diurne" means "semi-diurnal tide". This isn't a village.

Alain

[Sea Dreaming]

Originally Posted by Ann T. Cate

There's a spot near Raoul Is. (New Zealand waters) where the chart said something along the lines of "bottom rises and subsides approximately 20 ft." There is a nearby source of vulcanism.

Ann

Yikes!