{"id":47850,"date":"2015-02-23T19:55:15","date_gmt":"2015-02-23T19:55:15","guid":{"rendered":"http:\/\/samathieson.com\/sa-mathieson\/?page_id=47850"},"modified":"2015-06-16T13:52:45","modified_gmt":"2015-06-16T13:52:45","slug":"how-far-can-you-see-at-sea-calculate","status":"publish","type":"page","link":"https:\/\/samathieson.com\/sa-mathieson\/training\/data\/how-far-can-you-see-at-sea-calculate\/","title":{"rendered":"How far can you see at sea? Calculate it"},"content":{"rendered":"
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Choose a location:
\n<\/h2>\n<\/form>\n\n

Or, enter a height above sea level in metres:
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\n<\/h2>\n<\/form>\n

<\/h2>\n

How far can you see out to sea? It depends how high above the sea you are. The curvature of the earth means that, on the sea shore at a height of two metres, you can see just 5km or 3 miles.<\/p>\n

This calculator works out how far you can see at sea at a variety of locations around the UK coastline, including Plymouth Hoe, the top viewing platforms of Portsmouth’s Spinnaker Tower<\/a> and Blackpool Tower<\/a>, the White Cliffs of Dover, Beachy Head, the cliffs near Boulby (the highest sea-cliff on England’s east coast, Great Hangman in north Devon (the highest sea-cliff in England), Conachair on St Kilda (the highest sea-cliff in the UK) and a jet at cruising altitude.<\/p>\n

The result tells you the distance of the horizon at sea level. It may also be possible to see the tops of objects that are further away.<\/p>\n

When you choose a location, its height above sea level in metres will appear in the lower box. You can also use this box to enter any other height.<\/p>\n

Heights are from Ordnance Survey mapping<\/a> or the websites of the towers in question.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Choose a location: Standing on the sea shorePlymouth HoePortsmouth Spinnaker Tower Sky DeckBlackpool Tower EyeWhite Cliffs of DoverBeachy Head, East SussexBoulby, North YorkshireGreat Hangman, north DevonConachair, St KildaJet at 30,000 feet Or, enter a height above sea level in metres: How far can you see out to sea? It depends how high above the sea … Continue reading “How far can you see at sea? Calculate it”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":18104,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-47850","page","type-page","status-publish","hentry"],"yoast_head":"\nHow far can you see at sea? Calculate it<\/title>\n<meta name=\"description\" content=\"Works out how far you can see at sea, taking into account the earth's curvature. 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