Competence 1 (Deck)
- 1.Where can the data relating to the direction and velocity of rotary tidal currents be found?
- A.
Tidal Current Tables
- B.
Mariner's Guide
- C.
Tide Tables
- D.
Nautical Almanac
- 2.What is the nature of the beam transmitted by echo sounder?
- A.
Parabolic
- B.
Directional
- C.
Hyperbolic
- D.
Linear
- 3.Which statement about the Flinders bar on a magnetic compass is correct?
- A.
It corrects the semi-quadrantal error at intercardinal headings.
- B.
It compensates for the error caused by the vertical component of the earth's magnetic field.
- C.
It allows the magnetic compass to move freely in the fluid.
- D.
It reduces the deviation into half.
- 4.What is a chart that covers a large area?
- A.
Large scale chart
- B.
General chart
- C.
Coastal chart
- D.
Small scale chart
- 5.Which chart symbol indicates that the bottom is coral?
- A.
Sh
- B.
Cl
- C.
Co
- D.
R
- 6.When navigating using DGPS, you may expect your position to be accurate to within a radius of ________ meters.
- A.
100 m
- B.
50 m
- C.
20 m
- D.
10 m
- 7.The standard atmospheric pressure in millimeters of mercury is:
- A.
960
- B.
760
- C.
23.25
- D.
29.92
- 8.The interval between the sun's upper limb being in the horizon and its center being 12 degrees below is called:
- A.
Astronomical twilight
- B.
Civil twilight
- C.
Nautical twilight
- D.
Observational twilight
- 9.In the IALA Buoyage System, what is the color of an East Cardinal Mark?
- A.
Black band with above and below yellow band
- B.
Black band above and below yellow band
- C.
Black band below yellow band
- D.
Black band above yellow band
- 10.Which statement is TRUE concerning "night effect" and the reception of radio signals?
- A.
"Night effect" is most prevalent late at night
- B.
During "night effect", polarization is at a minimum
- C.
"Night effect" is caused by all of the polarized ground waves being vertical
- D.
"Night effect" is caused by rapid changes in the ionosphere
- 11.The standard time meridian for zone description -1 is:
- A.
15deg. E
- B.
7 1/2deg. E
- C.
0deg.
- D.
7 1/2deg. W
- 12.Polaris is always within how many degrees of the north pole?
- A.
1 degree
- B.
0.2 degree
- C.
0.5 degree
- D.
0.1 degree
- 13.The mean distance between the earth and the sun is:
- A.
1 astronomical unit (AU)
- B.
1 celestial unit
- C.
1 parsec
- D.
4.3 light years
- 14.A general chart could have a scale of:
- A.
1. 50,000
- B.
Not more than 1. 25,000
- C.
1. 200,000
- D.
1. 1,000,000
- 15.The standard sea level pressure of the atmosphere is:
- A.
1013.25 millibars of mercury
- B.
1012.45 millibars of mercury
- C.
1013.52 millibars of mercury
- D.
1012.35 millibars of mercury
- 16.A vessel is following a range to keep herself if within a narrow channel. The chart indicates the range to be 243deg. The vessel is on range, when she is steering a course of:
- A.
234deg. T
- B.
063deg. T
- C.
270deg. T
- D.
243deg. T
- 17.Due to the revolution of the earth around the sun, a sidereal day is shorter than a solar day by about:
- A.
3 mins and 26 secs
- B.
3 mins and 36 secs
- C.
3 mins and 06 secs
- D.
3 mins and 56 secs
- 18.The apparent wind can be zero when the true wind is from:
- A.
Astern and equal to the ship's speed
- B.
Ahead and equal to the ship's speed
- C.
Ahead and equal to twice the ship's speed
- D.
Astern and equal to twice the ship's speed
- 19.If your vessel is dragging her anchor in a strong wind, you should:
- A.
Increase the scope of anchor cable
- B.
Shorten the scope of anchor cable
- C.
Put over a stern anchor
- D.
Dropped another anchor
- 20.From those listed, which would be the preferred method of position fixing for greatest accuracy and certainty of position?
- A.
Taking a radar range and radar bearing
- B.
Taking several radar bearings
- C.
Taking several radar ranges
- D.
Taking a radar range and visual bearing
Questions: 21 | Attempts: 2810 | Last updated: Sep 22, 2020
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