Archive for February, 2013
"Traverse board: The ship's crew used a traverse board to plot the ship's speed and course over four hours, which was the length of time of one watch shift. The speed and compass direction were plotted on the board at thirty-minute intervals. At the end of the watch, the information plotted on the traverse board was charted on paper. The information helped pilots with estimating the ship's location" ~ Diorama/display in the Florida Museum of Natural History, Tallahassee, Florida. (Photo 091712-52.jpg) Traverse board: http://www.piraterelief.com/plank/?p=265.
" Navigation: Ship pilots of the 1500s had few tools to help them navigate unfamiliar waters. Pilots had to be familiar with astronomy, maps, math, physics, and seamanship to direct the ship successfully. Shifting winds and currents, and sometimes hurricanes made navigation difficult.
The Cross Staff: was used to measure the angle between the horizon and the sun or North Star. Combining this information with data from astronomical tables provided the latitude.
The Hourglass: A sand clock or hourglass was used to measure time. It took thirty minutes for the sand to empty from the upper to the lower chamber. The clock was turned upside down to repeat the process." ~ Diorama/display in the Florida Museum of Natural History, Tallahassee, Florida. (Photo 091712-53.jpg) Navigation: http://www.piraterelief.com/plank/?p=271.
Ship Wreck artifacts:
Welcome to our collection of Shipwreck Artifacts. We will be adding pictures from various shipwrecks and their artifacts on this archive from our travel tales and explorations around the world so visit back frequently for new additions.
Shipwreck artifacts are cultural items, once belonging to humans in maritime history that has been recovered after a shipwreck, maritime tragedy, or loss. Underwater archaeologists recover most of these finds, but sometimes these are found washed ashore or even inland as topical geology changes on the planet.