en_tn/pro/08/27.md

I was there

This is wisdom speaking about herself. (See: rc://en/ta/man/translate/figs-personification)

established

To establish something is to bring into being on a stable basis. Alternate translation: "created" or "made"

when he drew a circle on the surface of the deep

This refers to setting a limit to how far someone in a ship at sea can see all around himself. Alternate translation: "when he marked on the ocean's surface how far a person at sea can see in every direction" (See: rc://en/ta/man/translate/figs-explicit)

the deep

"the ocean"