Battlefield Premium members will receive access to the DLC two weeks before it goes on general sale.
The water combat focused expansion will feature four new maps set in the South China Sea. The official blurb reads:
Blow open a crashed passenger plane and capture fishing villages across the tropical Lost Islands. Drop a submarine on your foes as you infiltrate a naval base or rush between shipping docks and rocky islands on the massive Wave Breaker map. Wage war across stormy seas in the largest ocean stretch in a Battlefield map yet with Nansha Strike. Storm an abandoned cliff-side resort, or get lost in the breathtaking vistas in Operation Mortar.
Naval Strike also introduces five new weapons, the amphibious hovercraft vehicle, ten assignments and the all-new Carrier Assault mode, which is an homage to the fan-favorite, Titan mode from Battlefield 2142.
Naval Strike is one of five Battlefield 4 expansions due for release by the summer of 2014. They can be pre-purchased as part of the £39.99 / $50 Battlefield Premium subscription offering. The other four expansions are Second Assault, China Rising, Dragon's Teeth and Final Stand.