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.
The Anzac class is the current main fleet unit of the Royal Australian Navy; the class has eight vessels. The lead vessel of the class, HMAS Anzac, was commissioned in 1996 and the final vessel, HMAS Perth, was commissioned on 26 August 2006.efore the Federation of Australia in 1901, five of the six self-governing colonies in Australia operated a navy, the exception being Western Australia which did not have a naval force. The colonial navies were supported by the ships of the Royal Navy's Australian Station which was established in 1859.