Ch.11
This mechanical device is what Harrison used to transform navigation and accurately measure longitude.
What is the chronometer?
This Astronomer Royal opposed Harrison’s method in favor of the lunar distance method.
Who is Nevil Maskelyne?
This is what Captain James Cook used onboard his ships to fight scurvy.
What is sauerkraut?
This English watchmaker improved John Harrison’s concepts but struggled to scale production.
Who is Thomas Mudge?
This location became the international standard for the Prime Meridian in 1884.
What is Greenwich, England?
The H-1 was sent on trial with William Harrison, but it only made it as far as what European Country?
What is Portugal?
This organization resisted awarding John Harrison the full longitude prize despite his success.
What is the Board of Longitude
This was highly regarded by Captain Cook on his multiple journeys for being supremely helpful.
What is K-1?
This innovator pioneered mass production of chronometers by outsourcing labor and simplifying designs.
Who is John Arnold?
This annual event in Greenwich, where a large ball is dropped at 1pm, symbolizes the precision of timekeeping.
What is the Greenwich Time Ball tradition?
Harrison’s 3rd watch (H-3) took nearly 20 years to make, and couldn’t be tested right away due to what major event?
What is the Seven Years War?
How much of the prize did the Board of Longitude offer Harrison?
What is half?
How many days per month is the moon on the opposite side from the sun?
What is 13 days or two weeks?
This watchmaker refined chronometer designs to make them more reliable and affordable, helping sailors navigate more accurately.
Who is Thomas Earnshaw?
This Lieutenant Commander took on the task of restoring Harrison’s chronometers and helped to preserve his legacy in the 20th century.
Who is Rupert T. Gould?
Reverend Nevil Maskelyne, referred to as the villain/antihero in the book, is also known as what?
What is the Seaman’s Astronomer?
The Board of Longitude required this before giving over the full prize amount.
What are two duplicates of the H-4?
This watchmaker was tasked with reproducing an exact copy of the H-4 by the board.
Who is Larcum Kendall?
Why did the Board of Longitude disband in 1828?
What is the repeal of the Longitude Act?
In the 21st century, the reliance on this time standard might present challenges for countries with differing technological access or time zone disparities.
What is Universal Coordinated Time (UTC)?
Maskelyne used lunar distances to establish the precise longitude of what island?
What is St. Helena?
This is the main difference between the two surviving portraits of John Harrison.
What are the clocks that he is pictured with?
These were causing the H-5 to behave poorly at the observatory at Richmond.
What are lodestones
This key innovation in marine timekeeping, perfected by Thomas Earnshaw, made chronometers both more affordable and highly reliable, revolutionizing long-distance navigation.
What is the spring-detent escapement?
In 1967, this organization officially adopted UTC as the global standard, even though the standard had been used in some form for years before.
What is the International Telecommunication Union (ITU)?