Need some assistance.

[SilentScope]

First time player of this series.

I've done the first three patrol missions and on default realisim. I've yet to find an enemy ship to attack. I've told the sonar operator to scan and the radar to continous scan. Red Squares have shown up on the grid but after traveling over to them, nothings there.

1.
Is there something I'm doing wrong?

2.
I tried to fire the deck gun (single mission) and it tells me it's not ready?

Any suggestions would be appreciated.

Thank you.