Using Fathom It!'s Automatic Solver
We'll let the automatic solver find our next move. Click on the "Start Solver" button (or press F7) to start the solver. Within seconds, Fathom It! recommends the following:
"1 battleship can be placed in exactly one way: (H,2)-(H,5)"
The automatic solver has found that the battleship can only be placed in the squares (H,2) through (H,5). Sure enough, the battleship cannot be placed anywhere else on the board (take a moment to convince yourself this is true). Therefore, toggle square (H,4) to a middle segment, (H,5) to a right segment:
and finalize the squares. You should now see ...