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Navigational Instruments
Cronómetro de precisão – it was                                invented by John Harrison to                               ...
Roda do leme – controls the ship with                        movements that change the direction of                       ...
Quadrante -An early instrument for                       measuring altitude of celestial bodies,                       con...
Astrolábio -This tool was once used to                  determine the altitude of the sun or                  other celest...
Mapas - A representation of a                  region of the earth or heavens.Lugre Aviz ship
•   Ioanna Christofidou•   Ruta Turcinaviciute•   Beatriz Graça•   Joana Monteiro•   Inês Lopes•   Inês Fernandes
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Navigational instrument

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Navigational instrument

  1. 1. Navigational Instruments
  2. 2. Cronómetro de precisão – it was invented by John Harrison to determine the longitude and the time.Agulha de baleeira – instrumentsimilar to the compass but it isaffected by the Magnetic Northand by the Earth’s Magnetic field.
  3. 3. Roda do leme – controls the ship with movements that change the direction of the ship.Bússola marítima - Aninstrument whose magnetizedmetal needle aligns itself withthe magnetic fields of the earth.
  4. 4. Quadrante -An early instrument for measuring altitude of celestial bodies, consisting of a 90 graduated arc with a movable radius for measuring angles.Bússola - An instrument whosemagnetized metal needle aligns itself withthe magnetic fields of the earth. Thiscauses one end of the needle to pointnorth. Mariners used this information tonavigate the ship.
  5. 5. Astrolábio -This tool was once used to determine the altitude of the sun or other celestial bodies.Telégrafo – This instrument is usedby the captain to send importantorders to the function machines ofthe ship.
  6. 6. Mapas - A representation of a region of the earth or heavens.Lugre Aviz ship
  7. 7. • Ioanna Christofidou• Ruta Turcinaviciute• Beatriz Graça• Joana Monteiro• Inês Lopes• Inês Fernandes

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