Sophisticated instruments which were to make possible the European voyages of discovery, such as the astrolabe , the quadrant, and good navigational maps, were also developed by Muslims.
Well, pirates, explorers in the ocean, anyone like that — they all use charts, which are like maps, so 'uncharted territory', that means it's not on any maps.
That clear mental picture you must have continually in mind, as he sailor has in mind the port toward which he is sailing the ship; you must keep your face toward it all the time.
The Navy had excellent charts with which to guide submarines through canyons and around guyots, but it didn't wish such information to fall into Soviet hands, so it kept its knowledge classified.
To relieve the tedium of this untimely day she would overhaul the cupboards containing her grandfather's old charts and other rubbish, humming Saturday-night ballads of the country people the while.
For the past several Valentine's, we've adopted sexy alter egos -- Juliana, wild and spontaneous, and Clive, passionate collector of beautiful women and antique sailing maps.
Ultimately the Portuguese monopoly on spices was upended by a Dutch spy, Jan Huygen van Linschoten, who worked as secretary for the bishop of Goa in the 1580s and copied his charts, maps and navigational secrets.
Second mate: course 275. a passing vessel is on our port bow . the compass error has been adjusted. Dead racon is on the chart. Captain orders that call him if there is something abnormal.