At 13.5 pounds and 22 inches, STM is the smallest air-launched weapon in the Raytheon portfolio.
Has both GPS/INS and digital semi-active laser guidance."
Link to Original Source
Catch up on stories from the past week (and beyond) at the Slashdot story archive
I've never been canoeing before, but I imagine there must be just a few simple heuristics you have to remember... Yes, don't fall out, and don't hit rocks.