The letter A in illustration D006NG represents the __________.?
A) sensible horizon B) geoidal horizon C) visible horizon D) celestial horizon E)NULL
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The steady current circling the globe at about 60°S is the __________.?
A) Prevailing Westerly B) Sub-Polar Flow C) West Wind Drift D) Humboldt Current E)NULL
The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.?
A) coastal features B) ocean basin environment C) ocean routes D) military operating areas E)NULL
Magnetic dip is a measurement of the angle between the __________.?
A) geographic pole and the magnetic pole B) lubber’s line and true north C) horizontal and the magnetic line of force D) compass heading and the magnetic heading E)NULL
You take a bearing of 142° and 259° of two objects. What bearing of a third object will give the best fix?
A) 019° B) 084° C) 166° D) 281° E)NULL
What two shapes indicated in illustration D045NG are used to indicate a preferred channel?
A) A and B B) B and C C) C and D D) A and D E)NULL
What is TRUE of the history display of a target’s past positions on an ARPA?
A) It provides a graphic display to emphasize which vessel is on a collision course. B) In the true presentation, it provides a quick visual check to determine if a vessel has changed course. C) The display is one of…
The celestial coordinate of a star that is relatively constant in value is the __________.?
A) Greenwich hour angle B) local hour angle C) sidereal hour angle D) meridian angle E)NULL
A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.?
A) dead-reckoning position B) estimated position C) fix D) running fix E)NULL
Permission to leave the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal?
A) One short blast B) Two short blasts C) One long blast D) Two long blasts E)NULL