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All nautical instruments that measure the speed of a ship through water are known as logs. [2] This nomenclature dates back to the days of sail, when sailors attached a piece of lumber (a "log" of wood) to a rope knotted at regular intervals off the stern of a ship. Sailors counted the number of knots that passed through their hands in a given ...
Models were cast in different materials, including wood, bronze, lead, and clay. Greek warships were popular subjects to be made in miniature. One particular model, acquired by the Staatliches Museum (engl.: Land museum) in Kassel, Germany, proves to be helpful to archaeologists and historians in understanding what a hemiolia warship was like.
The trailboards are a pair of boards that may be found at the bow of certain sailing vessels, where they run from the figurehead or billethead back to or towards the hawsepipe. They are in the main decorative, though they often bear the name of the ship; they vary in decoration styles.
The traverse board is a wooden board with peg-holes and attached pegs. It is divided into two parts, upper and lower. The top part is for recording direction sailed. It has a representation of the compass rose with its 32 compass points, just as on the face of the ship's compass. Eight concentric rings are inscribed on the compass rose.
A decorative or ornamental knot (also fancy knot [1]) is an often complex knot exhibiting repeating patterns. A decorative knot is generally a knot that not only has practical use but is also known for its aesthetic or ornamental qualities. [ 2 ]
Knot: Speed: League: Length: Nautical mile: Length: Rhumb: Angle: The angle between two successive points of the thirty-two point compass (11 degrees 15 minutes) (rare) [1] Shackle: Length: Before 1949, 12.5 fathoms; later 15 fathoms. [2] Toise: Length: Toise was also used for measures of area and volume Twenty-foot equivalent unit or TEU: Volume
It consists of a small board with a knotted piece of twine through the center. The observer holds one of the knots in his mouth and extends the board away so that the edges make a constant angle with his eyes. Mariner's astrolabe Derived from the astrolabe, it was developed in late 15th century and found use in the 16th to 17th centuries.
An Electronic Navigational Chart (ENC) is a digital representation of a real-world geographical area for the purpose of Marine navigation.Real-world objects and areas of navigational significance, or to a lesser degree - informational significance, are portrayed through Raster facsimiles of traditional paper charts; or more commonly through vector images, which are able to scale their relative ...
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