I just started playing Harpoon again after many, many years. This scenario seems to be much harder than I remember. When I used to play it, I could reach 10 subs easily. Now I struggle to get 3. It seems like every time a sub is detected by SOSUS, by the time one of my picket planes get there it has disappeared. And my sub pickets never pick up anything even if I put them basically side by side in the gaps. What am I missing here? What is going on?