問題一覧
1
what is the color of the Starboard hand lateral marks in IALA region?
Green
2
What is the use of a wet bulb thermometer
it measures the temperature of the atmosphere if the atmosphere is 100 percent saturated
3
what is the deviation of a compass if the Compass heading 213 degree and the magnetic heading is 221 degree?
8 degree E
4
What is precipitation?
the part of the water cycle when clouds get heavy and can no longer hold the liquid water
5
what is the light color (when fitted) of the WEST cardinal marks used in IALARegion A and Region B?
white
6
which publication requires infrequent corrections?
sailing directions
7
what information does the outer ring of a compass rose on a nautical chart provide
true direction
8
which one is part of the compass wherein graduated directions are placed?
Compass card
9
which of the following is an indication of change in the weather that maybe expected on the passage of a line squal?
Sudden rise on the barometric pressure
10
The dry bulb thermometer is 30 degree Celcius an the wet bulb temperature is 28 degree Celcius , what is the relative humidity?
85%
11
What is the instrument on board use to measure atmospheric pressure?
Barometer
12
What is the shape of the Starboard hand lateral marks used in IALA Region B
Conical, Pillar, or spar
13
what judgement can you make in the weather forecast with a dropping barometer and a low cloud ceiling?
An increase of humidity and temperature
14
Which of the following condition could determine that the existence of a poor visibility is developing?
when warm moist air passes over a surface, which is cooler than the dew point of the air the visibility will deteriorate as advection fog is form
15
On your ARPA, there are two guard zone. How would you classify the function the inner guard zone?
It give warning of small targets that are initially detected that are closer than the outer zone.
16
A vesser is following a leading light to keep her within the middle of a narrow Channel. The Chart indicates the range to be 001 degree. if She is “on range” what course She iS steering?
True course 001 deg
17
What is the safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone?
Take a possible steps to avoid it if possible
18
What is the speed of the wind in a beaufort force 8?
Wind speed 34 to 40 knots means 37 knots
19
how would you classify the sextant error when the index arm is not pivoted at exact centreof the arc?
Centering error
20
What is the maximum sustained surface wind speed of a cyclone in order for it to be classified as a tropical depression?
about 33 knots
21
A common compass rose as found on a nautical chart shows true north and magnetic north. How many traditional winds are listed on a modern compass rose?
Eight
22
What is the space formed between the direction of the earths magnetic field and the horizontal?
Magnetic dip
23
What will be the effect of the uncorrected deviation due to permanent magnetism if the ship is proceeding towards the magnetic equator?
Decreases
24
What is your opinion of dew point?
It is the temperature to which unsaturated air must be cooled at constant water vapour content
25
Which routeing measure is described as areas within defined limits that constitute a boundry caused by natural obstacles, including those forming separation zones?
Traffic lane
26
What factors are used to determine climate?
Precipitation
27
What is the error introduced intothe satellite signal in the ephemeris data?
Epsilon error
28
How can it help you to avoid the center of the storm using your radar?
The Radar can display on the screen areas moderate or heavy rain continuously for at least 50 nautical miles in broad sector.
29
When the navigational channel passes under a fixed bridge, what would be the lights that mark the edges of the Channel on the bridge?
Red lights
30
What is the topmark (if any)?öf the Starboard hand lateral marks used in IALA Region A?
Single green cone, point upward
31
What is the line drawn on a chart through places of NO variation
Agonic
32
In Great Britain, the Nautical Almanac has been published annually and each page contains data that are tabulated for how many days?
3 days
33
Which of the following term refers to the direction of the flow of the current?
Set
34
What color pf the light will be displayed when information markers are lighted?
White lights
35
There are two Separate carrier frequencies that carry the signal transmitted by the GPS satellite. What is the first Carrier frequency?
1575.42 MHz