Acasta

[genus] Acasta is a genus of barnacles in the family Archaeobalanidae, containing the following species: ...
Found on http://en.wikipedia.org/wiki/Acasta_(genus)

Acasta

HMS Acasta was a British A class destroyer of 1350 tons built by John Brown and launched in 1929. She was sunk by the German battleship Scharnhorst off Narvik, Norway, while escorting the aircraft carrier HMS Glorious, with HMS Ardent in June 1940.
Found on http://www.probertencyclopaedia.com/browse/RA.HTM
No exact match found