The reference datum used in determining the heights of land features on most charts is（）.
Depiction of TSS's on charts uses（）as the primary color.
Attention is （）the advice on the use of charts in The Mariner’s Handbook Chapter 3，Section 1.
On a ship’s crane，the load chart relates the allowable load to the combination of the boom length and（）.
The revision date of a chart is printed on which area of the chart? （）
The compass rose on a nautical chart indicates both variation and （）.
The loran lines drawn on navigation charts represent（）.
The emergency signal for fires is sounded on the ship’s whistle and general alarm as（）.
The buoy symbol printed on your chart is leaning to the northeast. This indicates （）.
Solid green arrows on the main body of a pilot chart indicate （）.
On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.
On this chart only the principle （） to navigation are shown．
The pushbutton on the handset of a ships sound-powered telephone must be depressed to （）.
The amount and accuracy of the information provided on the different charts（）considerably.
The soundings on the imperial chart are measured in（）.
Many of the soundings shown on the chart are derived from （）.Undue reliance should not be placed upon them．
The agonic line on an isomagnetic chart indicates the （）.
On a ship crane，the load chart relates the allowable load to the combination of boom length and（）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
How did Mr. Phillips sound on the phone?
89. The revision date of a chart is printed on which area of the chart ________.
73. Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a ____.
85. The shoreline on charts generally represents the mean ______.
On a line chart, the x－axis is also called the dependent axis because its values depend on those of the y－axis.（)
