"Ark": square ship.

" Scorched earth": loess.

1. Ship:

Refers to: anything that uses the buoyancy of water, relying on manpower, sails, engines (such as steam engines, gas turbines, diesel engines, nuclear power units), etc. Power refers to pulling, pulling, pushing, rowing, or propelling propellers and high-pressure nozzles to enable transportation on water.

2. Classification by purpose:

Small merchant ships: vessels for commercial purposes.

Passenger ship: a ship for transporting passengers.

Cargo ship: A ship used for cargo transportation (carrying less than 15 passengers). Such as crude oil tankers, container ships, bulk carriers, etc. that transport crude oil.

Ferry: mainly carries cargo, passengers, and cars.

Railway rolling stock ferry: A ferry capable of transporting large rolling stock.

Cargo and passenger ships: ships for both cargo transportation and passenger transportation.

Rescue vessel: used for marine rescue work.

Work ship: a salvage ship that handles salvage and other work, a scientific research ship that engages in scientific research and inspections, and an engineering ship that performs maintenance and repair work on sailing ships.

Fishing boats: boats used in the fishing industry.

Non-commercial vessel: Use of vessel for non-commercial purposes.

Speed ??boat: A boat mainly used for water entertainment or rowing competitions. There are many types of motorboats, and hovercrafts all fall into this category.

Tug boat: a special boat that pushes and pulls large ships in and out of the port.

Pilot boat: A special boat that takes pilots on and off merchant ships.

Ship: A ship that specifies a waterway.

Warships: Military-purpose ships, such as cruisers, destroyers, etc. Military-affiliated ships that are not used for military purposes also fall into this category.