The thickness of the ozone layerâthat is, the total amount of ozone in a column overheadâvaries by a large factor worldwide, being in general smaller near the equator and larger towards the poles. It also varies with season, being in general thicker during the spring and thinner during the autumn.
Report Abuse. How ever many you have-is your fleet of ships. The US Merchant Marines currently have 465 ships in their fleet. The US Navy has a fleet of 286 ships. A fleet is the total number of ships. It can be the total number of a nation, or can be a fleet of ships operating under the same ownership.
A fleet is usually a large group of ships, but it can be any group of vessels like planes or cars that operate as a unit. A naval fleet is the largest formation of warships. A naval fleet at sea is like an army on land. One meaning of fleet comes from the Old English fleot, meaning âship,â âraft,â or âfloating vessel.â Although a fleet is usually a group of ships or airplanes operating under the same ownership, any group of vessels sailing together can be called a fleet, even you and your friends in a fleet of kayaks.