As much as it sucks, I restart.
Take my sig pic for example. I found a huge convoy that was protected only by a Flower Corvette (or so I thought). After having dispatched the escort, I surfaced and accelerated to flank to catch the convoy. No sooner than I broke the surface I clicked on the bridge icon to find this destroyer bearing down on me. I had just enough time to catch a screenshot of my impending demise.
