This is a black and white woodcut or engraving depicting a coastal scene with a ship, a castle, and people. The scene appears to be a demonstration of some sort of measurement or calculation, as lines and angles are drawn across the image, labeled with degrees (90°, 120°). The right side of the image features a large sailing ship with multiple masts and sails. There are figures on the deck, and a small boat is near the ship. On the left side, a castle or fort is built on a rocky coastline. People are gathered around a large cannon, seemingly aiming towards the ship. There's a small building or dock near the cannon. The sea is depicted with stylized waves. Lines are drawn from the ship to the castle and cannon, and from the cannon to the ship, indicating some sort of calculation or measurement being performed. The image has a historical or scientific feel, possibly illustrating a method of navigation or artillery calculation. The style is reminiscent of early printed illustrations.