Folding method of ship

The folding method of the ship is as follows:

Material preparation: a square piece of cardboard.

1. Fold the two corners of the square along the diagonal. The trace of the fold is deeper, and when it is opened, it looks like the picture below.

2. After that, fold the middle of the boat in half and the two ends in half, neatly folded and evenly distributed in size.

3. Fold inward along the crease, as shown in the figure below.

4. Open one of the corners. If it is the following shape, it is folded in half, otherwise it is folded in half.

5. Fold all the corners below.

6. Four corners are folded in different directions.

7. Arrange the four corners and fold them again according to the above method.

8. This will make the shape smaller and look like a small hat.

9, tidy it up and you can open it.

10, adjust according to the figure after opening.

Ship classification:

First, according to the purpose is divided into:

1. scientific research ship: a ship that conducts marine scientific research.

2. Engineering ship: a ship that carries out maintenance and repair work on a sailing ship or works on water and underwater.

3. Fishing boat: A vessel used for fishing.

4. Container ship: a ship, such as a barge, that specializes in transporting containers.

5. Oil tanker: a ship used to transport liquids.

6. Passenger ship: a large ship carrying passengers.

7. Non-merchant ships: ships used for non-commercial purposes.

Second, according to the material is divided into:

1, steel ship.

2. wooden boat.

3. Alloy boat.

4, barbed wire concrete boat-concrete reduces the use of steel.

5. FRP ship.

Three, according to the structure is divided into:

1, monohull, catamaran

It is often used in ferry and military transportation.

2. hydrofoil

This is a ship that can sail at high speed. There is a bracket at the bottom of the ship and a hydrofoil similar to the wing of an airplane is installed. When the ship accelerates, the hydrofoil can generate buoyancy to lift the hull off the water surface, thus reducing the water resistance and improving the sailing speed. Its steering mechanism does not use the ordinary rudder, but controls the attack angle of the left and right wings.

3. Hovercraft

Hovercraft is a kind of ship that can sail at high speed. It uses air to support at the bottom to reduce the resistance of water. The speed of many hovercraft can exceed 50 knots.