What's my "Lines"?

For newcomers to nautical charts, there is a tendency to think that a chart is simply a topographical map of the water.  Not quite.  Topographical maps have contour lines, showing increasing elevation.  The more lines, the higher the elevation.  More lines in a condensed area denotes cliffs or steep hillsides.  But the lines are all drawn in the same way, regardless of height.

Nautical charts have lines for the depth contours, but they are much more sophisticated.  Lines with different dot patterns mean different depths.  For example:

Depths from 0 to 3 fathoms (6 feet per fathom) or 18 feet are bounded by an unbroken series of dots: ………………At 24 feet or 4 fathoms, that pattern changes to a series of four dots, space four dots: ….  ….  ….At 5 fathoms it is five dots, space five dots: …..  …..  …..  

There are various patterns of dots continuing through different depth levels.  And to make it more colorful, the shallow waters from 0 to 10 fathoms (60 feet) are colored light blue.  Deeper water is white, and fathoms are noted by simple numbers, for example, 60 = 360 feet.

And that’s just the beginning of how different patterns of lines show depth.  I’d tell you more today, but it’s a deep subject! :)

Buffy Farley

  "Skipper" Steve Morris has been sailing for more than 45 years. Whenever Skipper's sailor friends used to talk about their sailing adventures, it was not unusual for them to grab a chart, unroll it to a certain island or waterway, and tell a story of what happened during a particular voyage. As Skipper realized that nautical charts are used for navigating stories as well as passageways, the idea of nautical chart murals came naturally. What better place to tell a tale of the sea than in one's own home or office than with a beautiful nautical chart mural as the visual aid!

   In 2013, he moved to the Coeur d'Alene area of Northern Idaho with his wife Linda. When Skipper is not working on murals, you can find him sailing his Erickson 27' on Lake Coeur d’Alene.

   He continues to design custom-made wallpaper from nautical charts, satellite photos, topographical maps and favorite photos.

http://nauticalchartwallpaper.com
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