Publisher's blurb:
"A Marine Survey" gives a set of four challenges for your heroes as they chart out the entrance to an unfamilliar harbor. Small boats in the surf, combined with precise measurement and tempermental instruments make this a challenge to get the right information, the right positions, and make a chart which could lead someone in a ship into the harbor. If you don't get it right, you'll be responsible for the wrecks which result, but if you get it right, you'll open this harbor to safer and more reliable navigation.
Just don't swamp your boat, fall overboard, run aground, or get the wrong measurements through all this, or you'll have a bad day!
This two page adventure should be enough to get you started with maritime mayhem in existing games without having to learn a whole new naval gaming system.