Underlined Depths

[microvise]

Can anyone please confirm that the reason some chart depths are underlined is because they are not covered by water during the LAT. Thanks Nick

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[ccscott49]

Yes, they are heights above LAT, I think, well I'm pretty sure.

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[stephenh]

I think you will find that underlined depths are technically drying heights above Chart Datum which is usually LAT on BA charts but not always .
Chart Datum and LAT vary on foreign charts also.
So take care....

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[ChrisSnushall]

Stephenh is absolutely right. Underlined heights show drying heights above Chart Datum.
Rocks that dry are the most dangerous things out there and can catch the unwary.

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[microvise]

Thanks guys.

Nick

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[Moose]

Lobster pots are the most dangerous things "out there" At least you know where the rocks are.

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El Alce