The ship made six short flutes. What does this mean? A backs off, B dodges, C turns around, D is in distress.

Six piccolo sounded on the ship, which meant that D was in distress.

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A ship generally refers to a ship propelled by machinery, and usually refers to a ship propelled by machinery. It is a water vehicle with high carrying capacity and long voyage. Ships are usually divided into three types: military ships, commercial ships and ferries. Below we will introduce the characteristics and classification of ships in detail.

Ships usually use mechanical means such as steam engine, diesel engine or electricity as propulsion power, thus pushing the ship forward. Ships have strong carrying capacity and can carry a large number of goods and passengers, which makes ships have high efficiency and economy in water transportation. The voyage of the ship is very long, so you can choose different routes according to your needs, from short distance to ocean voyage.

The ship has good stability and strong wind and wave resistance, which can ensure the safety and reliability of maritime transportation. Military ships in ships refer to ships used for military purposes, including combat ships and auxiliary ships. Military ships have strong defense and attack capabilities and can perform a variety of military tasks.

Commercial ships refer to ships used for commercial transportation, including cargo ships, oil tankers, passenger and cargo ships, etc. Merchant ships are mainly used for the transportation of goods and passengers by sea, with large load and long voyage. Ferry is a kind of ship used for water traffic, including passenger ferry and passenger ferry. Ferry is mainly responsible for transporting vehicles, passengers or other articles from one water area to another.

Ships can be classified according to tonnage, among which giant tankers have the largest carrying capacity, which can reach hundreds of thousands of tons; The tonnage of large cargo ships and passenger and cargo ships is second; Small ships and passenger ships have smaller tonnage. Ships can be divided into steam ships, diesel ships and electric ships according to their propulsion methods.

A steam ship is a ship propelled by steam; Diesel ship is a ship propelled by diesel engine; An electric ship is a ship propelled by electricity. Ships can be classified according to their uses, including ocean-going cargo ships, ocean-going passenger ships, oil tankers, container ships, warships and scientific research ships.

Ocean-going freighters are mainly responsible for the transportation of goods by sea; Ocean-going passenger ships mainly transport passengers; Tankers specialize in transporting petroleum or petroleum products; Container ship is a ship that specializes in transporting container goods; Warships are mainly used for military purposes; The scientific research ship is mainly used for scientific investigation and research.

In a word, the ship is an indispensable means of transportation in water transportation, which has a wide range of applications and development prospects. In the future, with the continuous development of technology, ships will be applied in more fields and become an important part of people's production and life.