Research Brief: In the 18th century, the only way to navigate accurately at sea was to follow a coastline all the way, which would not get you from ... Martin Richardson De Montfort University, Leicester Zeeba TV ( is part of the River Valley group of Companies.

John Harrison S Fourth Timekeeper - Context Reference Guide

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Today we take a look at one of the most vexing problems to face mariners in the Age of Sail, working out your longitude, and how ... Martin Richardson De Montfort University, Leicester Zeeba TV ( is part of the River Valley group of Companies.

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In the 18th century, the only way to navigate accurately at sea was to follow a coastline all the way, which would not get you from ...

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  • Today we take a look at one of the most vexing problems to face mariners in the Age of Sail, working out your longitude, and how ...
  • Martin Richardson De Montfort University, Leicester Zeeba TV ( is part of the River Valley group of Companies.
  • In the 18th century, the only way to navigate accurately at sea was to follow a coastline all the way, which would not get you from ...

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Visual Search References

John Harrison's fourth timekeeper
A Detailed Study of H4 - John Harrison's Longitude Timekeeper Reconstruction
Should we stop the Harrison clock?
A model of the remontoire action on John Harrisons longitude watch H4
The Longitude Problem - Improving Navigation with the Harrison Clocks
Longitude - TV movie 2000
John Harrison's Clock at the Royal Observatory in Greenwich England
The First Longitudinal Clocks
The Clock That Changed the World (BBC History of the World)
HARRISONS 'H4' HOLOGRAMS: Stopping Time
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Open Reader Guide
John Harrison's fourth timekeeper

John Harrison's fourth timekeeper

This short film is from Editor David J. Eicher's 2013 England astronomy tour.

A Detailed Study of H4 - John Harrison's Longitude Timekeeper Reconstruction

A Detailed Study of H4 - John Harrison's Longitude Timekeeper Reconstruction

Read more details and related context about A Detailed Study of H4 - John Harrison's Longitude Timekeeper Reconstruction.

Should we stop the Harrison clock?

Should we stop the Harrison clock?

Read more details and related context about Should we stop the Harrison clock?.

A model of the remontoire action on John Harrisons longitude watch H4

A model of the remontoire action on John Harrisons longitude watch H4

Read more details and related context about A model of the remontoire action on John Harrisons longitude watch H4.

The Longitude Problem - Improving Navigation with the Harrison Clocks

The Longitude Problem - Improving Navigation with the Harrison Clocks

Today we take a look at one of the most vexing problems to face mariners in the Age of Sail, working out your longitude, and how ...

Longitude - TV movie 2000

Longitude - TV movie 2000

In the 18th century, the only way to navigate accurately at sea was to follow a coastline all the way, which would not get you from ...

John Harrison's Clock at the Royal Observatory in Greenwich England

John Harrison's Clock at the Royal Observatory in Greenwich England

John Harrison's Clock at the Royal Observatory in Greenwich England

The First Longitudinal Clocks

The First Longitudinal Clocks

Read more details and related context about The First Longitudinal Clocks.

The Clock That Changed the World (BBC History of the World)

The Clock That Changed the World (BBC History of the World)

Read more details and related context about The Clock That Changed the World (BBC History of the World).

HARRISONS 'H4' HOLOGRAMS: Stopping Time

HARRISONS 'H4' HOLOGRAMS: Stopping Time

Dr. Martin Richardson De Montfort University, Leicester Zeeba TV ( is part of the River Valley group of Companies.