Your earned weapon for when the sub is the last ship standing — reveal its quadrant, then fire two shots a turn.
Submarine Radar is a power-up you earn, not a purchase. It only comes into play when your opponent's submarine is the only ship left — the moment the endgame usually turns into blind guessing.
Isolated, the submarine can take 10–20+ shots of pure guessing to find. Radar cuts that down: it reveals which quadrant the sub is hiding in, then unlocks two shots per turn for the rest of the match. Earn it by watching one short ad at the start of the game.
At the start of a game you're asked if you want to watch a short ad to arm radar for that match. Skip it and play normally, or watch it to bank the power-up.
Radar stays dormant until the submarine is the last enemy ship. Sink it earlier and the radar simply goes unused — no waste, no penalty.
The correct quadrant flashes three times, narrowing the hunt from 100 cells to 25 — and you switch to two shots per turn.
With the search cut to a single quadrant and double the shots, you corner the sub roughly twice as fast. Finish strong.
The 10×10 sector is split into four quadrants. Radar lights the one the sub is hiding in — here, the lower-right block glows while the last ship is cornered.
Radar active · sub cornered to one quadrant · 2 shots per turn
Cut the endgame in half. No more endless blind guessing — close it out.
The sub endgame can feel like luck. Radar hands you back control.
The quadrant flash and 2-shot mode feel like flipping on a superpower.
Before the match, choose to watch a short video ad to arm radar for that game.
No in-app purchases. Every player has the same access by watching ads.
Once armed, radar is available the whole game — it fires when the sub is last.
Sea Grid Armada is available now on the App Store — free for iPhone & iPad.
Download on the App Store