1. An imaginary line around the earth half way between the north & south poles is called:
a) the prime line of latitude
b) the equator
c) the prime meridian
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2.The imaginary lines running between the north & south poles around the earth:
a) are called lines of longitude and they start with 0° at the equator
b) are called meridians of longitude and they run east & west from the prime meridian from 0° to 180°
c) are called lines of latitude and they run east and west from the line passing through Greenwich
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3. Positions on the earth can be given using co-ordinates on an imaginary grid system. By convention, mariners give position by:
a) stating the latitude first and the longitude second using degrees, minutes and tenths of minutes OR seconds
b) stating the longitude first and the latitude second using degrees, minutes and tenths of minutes OR seconds
c) stating north latitude first, then south latitude followed by west longitude , then east longitude
d) none of the above
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4. Mariners measure distances in nautical miles. A nautical mile is equal to:
a) a minute of a degree of latitude at the equator
b) a minute of a degree of longitude anywhere on the earth's surface
c) a minute of a degree of latitude anywhere on the earth's surface
d) 1852 feet
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5. Direction is defined as the angle between a reference line & a line that joins a point on that reference line to some other point. The most commonly used reference for directions on the earth's surface is:.
a) the local meridian
b) the local line of latitude
c) the prime meridian
d) none of these
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6. To portray all the important features on the earth and other features such as harbours, dangers to navigation etc. on paper mariners use:
a) marine charts
b) nautical road maps
c) GPS receivers
d) strip charts where north is always shown on the top of the chart
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7. The type of chart most commonly used by mariners in local areas use:
a) a point-to-point projection
b) a direct projection
c) a Mercator projection
d) all of the above
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8. On a Mercator projection lines of latitude and longitude appear as:
a) straight lines of latitude & longitude but courses must be plotted as curved lines
b) curved lines
c) straight lines
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9. Every chart has a "title block" which give key information about the chart. This would normally contain such things as:
a) area covered by the chart, type of projection, the scale of the chart, depths of water, heights of land
b) distances between points on the chart
c) direction of courses between points on the chart
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10. Heights of land are often given relative to chart datum which in non-tidal waters is chosen according to:
a) average water level
b) higher high water
c) Neither of the above
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11. Depths of water are shown by small figures in the water area of the chart. These indicate the depth of water:
a) below chart datum in non-tidal waters
b) below higher high water in tidal waters
c) below lowest normal tide in tidal waters
d) Either a) or c) depending on the waters being sailed
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12. The compass rose is used to indicate:
a) true north clockwise on the outer ring, magnetic north counter-clockwise on the inner ring
b) the true north clockwise on the outer ring and magnetic north clockwise on the inner ring
c) the magnetic deviation of the area of the chart for a particular year
d) the magnetic variation of the area of the chart at all times
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13. Compass roses on a chart always:
a) show the same information but a different points on the chart
b) are printed only at points near the top left corner and bottom right corner
c) are printed to show different changes in deviation by year
d) are printed to show variation at differnt points on the chart
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14.Parallels of latitude run in an east-west direction & are indicated by horizontal lines. These lines are drawn at 10' intervals labelled:
b) upon the compass rose
c) along both top and bottom margins of the chart
d) along both side margins of the chart
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15. Meridians of longitude, which run in a north-south direction are indicated on the chart by vertical lines. Since the Boating Chart is in the Western hemisphere longitude increases:
a) from right to left across the chart
b) from bottom to top on the chart
c) from left to right across the chart
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