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[14]: 11–12 To set forth these navigational rules, the terms starboard and port are essential, and to aid in in situ decision-making, the two sides of each vessel are marked, dusk to dawn, by navigation lights, the vessel's starboard side by green and its port side by red. [14]: 15 Aircraft are lit in the same way.
The cross-staff was an ancient precursor to the modern marine sextant. "The light of navigation", Dutch sailing handbook, 1608, showing compass, hourglass, sea astrolabe, terrestrial and celestial globes, divider, Jacob's staff and astrolabe. Fairly accurate maps of the Americas were being drawn in the early 17th century.
Swan upping in skiffs. Skiffs are both recreational and working boats on the Thames. They can be seen used for swan upping and other general purpose duties. [3] Racing skiffs are specially built for skiffing in competitions at regattas and long-distance marathon events between the various skiff clubs under The Skiff Racing Association rules along the Thames and also for recreational purposes ...
An example of a complete light characteristic is "Gp Oc(3) W 10s 15m 10M". This indicates that the light is a group occulting light in which a group of three eclipses repeat every 10 seconds; the light is white; the light is 15 metres above the chart datum and the nominal range is 10 nautical miles.
Pintsch gas lights continued to be used for navigation into the 20th century, but after the First World War, Pintsch gas began to be superseded by acetylene as the preferred fuel for unattended navigation lights. By the early 1930s, very few buoys or beacons were still being lit by Pintsch gas.
The boats of HMS London were kept at five minutes' notice, ready equipped with water, salt pork, biscuits, arms, local currency and a small cask of rum. Manned by eight or nine sailors, with a midshipman or junior lieutenant in command, a boat was often away from the London for two or three weeks, normally anchoring every night, the men off ...