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WikiCards · Card list · Science cards · Longitude by chronometer
Common card · Science
Longitude by chronometer, a Common card
Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during the first half of the eighteenth century.
- Rarity
- Common
- Domain
- Science
- ATK
- 55
- DEF
- 24
- Power
- 79
- Wikipedia reads a year
- 11,000
Power 79 (ATK + DEF): stronger than 35 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- It is an astronomical method of calculating the longitude at which a position line, drawn from a sight by sextant of any celestial body, crosses the observer's assumed latitude.
- In order to calculate the position line, the time of the sight must be known so that the celestial position i.e. the Greenwich Hour Angle and Declination, of the observed celestial body is known.
- All that can be derived from a single sight is a single position line, which can be achieved at any time during daylight when both the sea horizon and the sun are visible.
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Longitude by chronometer article was read about 11,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 55 and blocks with 24: each hit it takes is cut by 10 %.
How to get Longitude by chronometer
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
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Card lists
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- Legendary cards136 cards
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Credits
Text : Wikipedia, Longitude by chronometer (revision), CC BY-SA 4.0. Photo : Tatters ❀ from Brisbane, Australia, CC BY-SA 2.0, Wikimedia Commons.
