Krazydad Battleships Attack!! Volume 2: 216 Ferocious Puzzles

From the creator of the most popular free printable puzzle website on the Internet, Krazydad, here are 216 15 × 15 Battleship Solitaire puzzles to keep you distracted for countless hours.

Each puzzle has a single, unique solution. Answers are included, as well as a set of secret naval codes (also known as "instructions").