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Isogonic lines, dashed magenta lines, indicating magnetic variation for a given year; Indications of flashing lights (star with Fl) or marine lights (black dot); Local operations such as parachuting, glider, and ultralight (magenta parachute or glider symbol with letter G, H (hang glider), U (ultralight));
Line moiré is one type of moiré pattern; a pattern that appears when superposing two transparent layers containing correlated opaque patterns. Line moiré is the case when the superposed patterns comprise straight or curved lines. When moving the layer patterns, the moiré patterns transform or move at a faster speed.
It helps the user to distinguish the selection border from the image background by animating the border. The border is a dotted or dashed line where the dashes seem to move slowly sideways and up and down. This creates an illusion of ants marching in line as the black and white parts of the line
The dashed lines are the equal-latitude and equal-longitude lines on top of the background map. The solid lines show equal-range and equal-azimuth with the respect to the radar position. It is a feature of the radar projection that equal-range lines are circles and equal-azimuth lines are straight lines.
This is due to the bending of light rays as they move from the water to the air. Once the rays reach the eye, the eye traces them back as straight lines (lines of sight). The lines of sight (shown as dashed lines) intersect at a higher position than where the actual rays originated.
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The dashed line is the spacetime trajectory ("world line") of the particle. The balls are placed at regular intervals of proper time along the world line. The solid diagonal lines are the light cones for the observer's current event, and they intersect at that event. The small dots are other arbitrary events in the spacetime.
A stop line is always represented by a white thick traversal continuous line, but a give way line may be represented by a white thick dashed line as rectangles (Germany, France, Spain) or by a double-dashed line (United Kingdom) or by a white line of triangles (Austria, Italy, Liechtenstein, the Netherlands, Norway, and Switzerland).