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A. Mercury barometer. B. Electric aneroid barometer. C. Aneroid barometer.<\/p><\/div><\/p>\n
Thermometer.<\/strong> This is used to measure the ambient air temperature as well as the temperature of the sea water. Rubber bucket with thermometer inside for taking sea temperatures. Hygrometer.<\/strong> The hygrometer consists of a \u201cwet\u201d and a \u201cdry\u201d bulb thermometer, mounted in a louvered container called a Stevenson screen. It is used to measure the humidity of the air, ie the water carrying capacity of the air. Hygrometer in a Stevenson Screen.<\/p><\/div><\/p>\n Anemometer & wind vane.<\/strong> These two instruments can either be mounted as two separate instruments or is a single combined unit. The anemometer measures wind speed whilst the wind vane measures the direction of the wind. Anemometer & Wind vane.<\/p><\/div><\/p>\n Barograph.<\/strong> A barograph is used to measure and to record the air pressure over a period of time, ie a week. Barograph.<\/p><\/div><\/p>\n The seafarer also makes use of weather maps which he receives in the form of a facsimile via radio from ashore. A weather map can also be constructed from weather data collected by the met offices ashore and gives a graphic picture of the weather in an area. It shows isobars (lines of equal pressure), the presence of fronts and wind. <\/p>\n","protected":false},"excerpt":{"rendered":" The met instruments usually carried aboard merchant vessels and warships are the following: Barometer. This instrument measures the atmospheric pressure (usually in millibars). They can either be mercury barometers or aneroid barometers. The first type uses a column of mercury to measure to measure the pressure, whilst the aneroid uses […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[102,103,105],"tags":[],"class_list":["post-484","post","type-post","status-publish","format-standard","hentry","category-3-meteorology-weather-at-sea","category-10-3-1-meteorology-for-mariners","category-10-3-1-2-meteorological-instruments"],"_links":{"self":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts\/484"}],"collection":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/comments?post=484"}],"version-history":[{"count":2,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts\/484\/revisions"}],"predecessor-version":[{"id":486,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts\/484\/revisions\/486"}],"wp:attachment":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/media?parent=484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/categories?post=484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/tags?post=484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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A. Ambient air temperature.
B. Sea water temperature.<\/p><\/div><\/p>\n
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