The phrase "announced as such" is correct and usable in written English.
It can be used when referring to something that has been officially declared or stated in a specific manner.
Example: "The event was announced as such in the press release, clarifying its significance."
Alternatives: "declared as such" or "stated as such".
This attack was made at a public gathering announced as such.
But mostly they keep separate, with discreet songs and dances, sometimes bluntly announced as such ("Between Song").
Though not explicitly announced as such, the penultimate Friday of this year's Proms had become a tribute to Pierre Boulez, who died in January.
If not explicitly announced as such, "Myths, Illusions, and Peace: Finding a New Direction for America in the Middle East" reads very much like a foreign-policy blueprint for the region for a new administration.
Relics of this survived into the 20th century in the United Kingdom in the conventions by which an "honourable" did not use the title on a visiting card and was not announced as such.
The electoral conditions were announced as such: The election 67 districts were reduced to 47. M'ba disqualified Aubame by announcing no one who held a post recently was banned.
His last appearance--never announced as such--happened to take place in Los Angeles on April 10 , 1964
In the 1940s and '50s, outside of (mostly paperback) genre fiction, even the worst junk seldom candidly announced itself as such.
This was clearly a work of enormous ambition, and it announced itself as such: "American prosperity was built on two-and-a-half centuries of slavery, a deep wound that has never been healed or fully atoned for – and that has been deepened by years of discrimination, segregation, and racist housing policies that persists to this day.
Roundabout even announced it as such.
"Now we must ride into the world and seek out strange adventures," Lancelot announces, as though such a compulsion were self-evident.
