The Tomatometer score — based on the opinions of hundreds of film and television critics — is a trusted measurement of critical recommendation for millions of fans. It represents the percentage of professional critic reviews that are positive for a given film or television show.
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The Tomatometer is 60% or higher.
The Tomatometer is below 60%.
Movies and TV shows are Certified Fresh with a steady Tomatometer of 75% or
higher after a set amount of reviews (80 for wide-release movies, 40 for
limited-release movies, 20 for TV shows), including 5 reviews from Top Critics.
Percentage of users who rate a movie or TV show positively.
This television documentary follows the search for the key to navigating the seas. It is based on the novel by Dava Sobel, Lost at Sea -- The Search for Longitude. It begins with Will Andrewes, as he joins a crew to try out a replica of a typical log and line of the early 1700s. It was a crude method, using a triangle of wood (called a log) with a knotted line tied to it. They would count the number of knots that passed through the navigator's fingers in the time it took a 28-second sand glass to flow through. This would give the speed of the ship in knots and was the only way to tell the distance a ship traveled at sea. These ideas were advanced by astronomers and by accurate timepieces made by John Harrison in the 1700s. The rest of the episode shows the continued quest for accurate longitude through astronomy and accurately tracking time at sea.