問題一覧
1
How can understanding tidal patterns be helpful for navigation
to plan safety passages to shallow and coastal waters
2
Why might the ship navigator need to consult from both tide charts and tide tables
they provide different perspective on the same formation allowing for more comprehensive understanding of tidal patterns
3
What is the purpose of using chart datumn when displaying tidal information
to provide a consistent reference point for measuring tides
4
How can atmospheric pressure affect the tidal time
rising pressure increases the water level while falling pressure decreases it
5
What factors can cause short term publication in sea level besides tides
all of the above
6
Which of the statement is true about tidal irregularities cause by waves
they have various periods and can disrupt the regular pattern of high and low tides
7
what factor can cause irregularities in the time in of high and low tide
strong winds and changes on atmospheric pressure
8
What is the difference between MSL and chart datumn
MSL is global average when chart datumn is specific in location
9
Where does MSL typically measures
at specific time station with reference level
10
What does MSL represent in tides are not present
the level of the sea surface in the absence of tide
11
What is the difference between MHWS and MLWS
MHWS is the average height of all high spring tides while MLWS is the average of all spring tide
12
What is the term use to describe the water level at any moment excluding wave variation but including tide and.....
still water level
13
What information is provided in tide tables
predictions of daily high and low tides, times and height
14
How often in the cycle do the values of high water spring, high water neap, low water neap and low water Spring typically changes
approximately every 18.6 years considering astronom
15
factors that contribute to the observed tides.......difference between standard port and secondary
Standard port have tide prediction based on long term observation but secondary port don't
16
what is the main function of tide tables
to predict daily high and low tide, times and height at specific location
17
What is the primary purpose of the Admiralty List of Radio Signals?
To provide information on vital maritime communication and navigation services
18
What type of information does ADRS 1, 3, 4, and 5 provide to bridge crews?
Assistance with routine radio communications and safety information
19
What is the main function of radio time signals for mariners?
To ensure accurate timekeeping and synchronization
20
What are the two main formats in which radio time signals are transmitted?
Audible voice messages and Morse code
21
What are Radio Navigational Warnings (RNWs) used for?
To alert mariners about new navigational hazard and changes
22
What limitations of maritime radio communication systems are explained in Pub. No. 117?
The range and effectiveness of various radio stations
23
What does Volume 6 of the ADMIRALTY List of Radio Signals focus on?
Pilot services, vessel traffic systems, and port operations
24
How do precautionary areas differ from areas to be avoided on Routeing Charts?
Areas to be avoided are completely restricted to all vessels, while precautionary areas require extra caution.
25
What is the main purpose of load lines depicted on Routeing Charts?
To show the maximum safe draft of a vessel based on its stability
26
What is the benefit of using monthly charts in Routeing Charts?
They allow mariners to consider seasonal variations in weather and currents.
27
What type of information do Routeing Charts NOT include?
List of Shipping companies and its Owners
28
What is the primary purpose of Admiralty Routeing
To assist in passage planning for ocean voyages
29
What is the function of traffic lanes in a traffic separation scheme (TSS)?
To separate opposing streams of traffic for safer navigation
30
What are the typical scales used in Admiralty Routeing Charts?
1:5,000,000, 1:10,000,000, and 1:20,000,000
31
What information do wind roses on Routeing Charts provide?
The prevailing wind direction and frequency for each month
32
What does a roundabout in a TSS represent?
An area for vessels to change course gradually
33
How do Routeing Charts assist bridge crews in high-level route planning?
They cover large geographical areas, enabling strategic route selection.
34
What type of traffic is permitted in the inshore traffic zone
only vessels with specific authorization or exemption
35
Which publication does NOT exist in the context of maritime radio communications?
Radio Time Signal Book
36
What information can be found in the ADMIRALTY List of Radio Signals regarding AMVER?
Procedures for reporting missing persons at sea
37
What additional information does ADRS 2 offer compared to 1, 3 and 5
positional and time keeping references worldwide
38
What are the primary channel to do with the navigational warning disseminated
Area warning and NAVTEX broadcast
39
What type of information is NOT typically included in the Admiralty List of Radio Signals
description of the capabilities and limitations of radio operators
40
Tidal pattern of semidiurnal
there are two high and two low waters each tidal day
41
tidal pattern of diurnal tide
only a single high and single low water occur each tidal day
42
tidal pattern of mixed tide
the tide is characterized by a large inequality in the high water heights, low water heights, or in both
43
When do Spring tide occur
A tide with a large tidal range that occurs two times a month (new moon and full moon)
44
When do Neap Tide occur
A tide of minimum range that occurs during the first and third quarters of the moon
45
How do Spring tide occur
when Sun, Earth, and the moon are aligned
46
How do Neap Tide occur
when the gravitational forces of the Moon and the Sun are at right angles to each other