All players with access to combat missions and tests in their Service Record are eligible for Space Battles. Beginners in World of Warships will have to play 70 battles in any of the available modes before being granted access.
Please note that you need to switch to Space Battles in the "Select a battle type" tab, and you can participate in them only on special ships.
Space Battles are not available in the Training Room, and special spaceships can't join Training Battles.
The event is spread over 3 stages, each with its own particular modes:
Stage 1: Rings of Saturn and Binary Star modes
Starts: Mon. Apr. 01 4:20 AM PT / your local time: Mon. Apr. 01 7:20 AM
Stage 2: Space Assault mode
Starts: Mon. Apr. 08 4:20 AM PT / your local time: Mon. Apr. 08 7:20 AM
Stage 3: Torpedo Beat mode
Starts: Mon. Apr. 15 4:20 AM PT / your local time: Mon. Apr. 15 7:20 AM
The event will end with the release of Update 0.8.3.