INT 1 · K 14
Sunken rock with known depth
DangersCore
A sounding with an italic R gives the measured least depth over rock.
What it means
A sounding accompanied by italic R gives the known least depth over a submerged rock. A danger surround is added where appropriate.
Why it matters
Treat the number as a least depth at chart datum, not a passage recommendation. Apply tide, uncertainty, sea state, and under-keel margin.