Please help an English Newbie.
 

Hi Everyone,

Please can someone help a Newbie from England. What is the significance and use of the button between the 'fore' and 'aft' torpedo display? It lights up red with a black 'S' when the periscope cross-hairs pass over a target vessel but I don't know how to use it properly.

Regards,

Lewisson.

That is the "Lock" and indicator button. With the crosshairs over a target, press that button, or the "L" keypad, and the periscope will "Lock" onto the target.

Thanks. I thought it might be to do with firing.
Regards,
Lewisson.

Welcome aboard!