1) Impact crater on Mars
Found on
https://www.crosswordclues.com/clue/ochakov
The Ochakov was a Russian leningrad Class destroyer of 2900 tons displacement launched in 1938. The Ochakov was powered by 3-drum type oil-burning boilers providing a top speed of 36 knots. She was armed with five 5.1 inch guns; two 3 inch anti-aircraft guns; two 37 mm anti-aircraft guns; four depth charge throwers and six 21 inch torpedo tubes arr...
Found on
http://www.probertencyclopaedia.com/browse/RO.HTM
No exact match found.
