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.
Most fleets are named after that ocean or sea, but the convention in the United States Navy is to use numbers. A fleet is normally commanded by an admiral, who is often also a commander in chief, but many fleets have been or are commanded by vice admirals or even rear admirals. Most fleets are divided into several squadrons, each under a subordinate admiral. Those squadrons in turn are often divided into divisions.