TERNAV (FINALS) Flashcards
What is the primary purpose of the Admiralty List of Radio Signals?
To provide information on vital maritime communication and navigation services
What are Radio Navigational Warnings (RNWs) used for?
To alert mariners about new navigational hazards and changes
What are the two main formats in which radio time signals are transmitted?
Audible voice messages and Morse code
What information can be found in the ADMIRALTY List of Radio Signals regarding AMVER?
Procedures for reporting missing persons at sea
Which publication does NOT exist in the context of maritime radio communications?
I DON’T KNOW
How is Pub. No. 117 updated?
By downloading software updates or through NTM
What limitations of maritime radio communication systems are explained in Pub. No. 117?
The range and effectiveness of various radio stations
What is the main function of radio time signals for mariners?
To ensure accurate timekeeping and synchronization
What does Volume 6 of the ADMIRALTY List of Radio Signals focus on?
Pilot services, vessel traffic systems, and port operations
What type of information does ADRS 1, 3, 4, and 5 provide to bridge crews?
Assistance with routine radio communications and safety information
What does a roundabout in a TSS represent?
An area for vessels to change course gradually
What type of information do Routeing Charts NOT include?
List of Shipping companies and its Owners
What information do wind roses on Routeing Charts provide?
The prevailing wind direction and frequency for each month
What are the typical scales used in Admiralty Routeing Charts?
1:5,000,000, 1:10,000,000, and 1:20,000,000
How do Routeing Charts assist bridge crews in high-level route planning?
They cover large geographical areas, enabling strategic route selection.
What is the function of traffic lanes in a traffic separation scheme (TSS)?
To separate opposing streams of traffic for safer navigation
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
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.
What is the benefit of using monthly charts in Routeing Charts?
They allow mariners to consider seasonal variations in weather and currents.
What is the primary purpose of Admiralty Routeing Charts?
To assist in passage planning for ocean voyages
How can understanding tidal patterns be helpful to navigation?
to plot safe passages through shallow coastal water
Why might the ship navigator need to consult from both tidal charts and tide tables?
they provide different perspectives on the same information allowing for a more comprehensive understanding of tidal waters
What is the purpose of using chart datum when displaying tidal information?
To provide a consistent reference point for measuring tides.
How can atmospheric pressure affect the height of the tide?
Rising pressure increases the water level while falling pressure decreases it.
What factors can cause short-term fluctuations in sea level, besides tide?
All of the above.
Which of the following statements is true about tidal irregularities caused by waves?
They have various periods and can disrupt the regular patterns of high and low tides.
What factors can cause irregularities in the timing of high and low tides?
Strong winds and changes in atmospheric pressure.
What is the difference between MSL and chart datum?
MSL is global average while chart datum is specific to a location.
Where is MSL typically measured?
At a specific time station with reference level.
What does MSL represent if tides are not present?
The level of the sea surface in the absence of tides.
What is the difference between MHWS spring and mean low water spring?
MHWS is the average height of all high spring tides while MLWS is the average of all low spring
tides.
What is the term used to describe the average water level at any moment excluding wave variations but
including tides and surges?
Still water level
What information is provided in tide tables?
Predictions of daily high and low tides times and heights.
How often in a cycle do the values of high water spring, high water neap, low water neap and low water
spring typically change?
Approximately every 18.6 years considering astronomical factors.
What is horizontal movement?
- current but since there’s no current in the option the answer is
tidal stream
What is the difference between standard port and secondary port?
Standard port have tide predictions based on long-term observations while secondary ports don’t.
What is the main function of tide tables?
To predict daily high and low.
What type of information do routing charts NOT include?
List of Shipping companies and its Owners
What is the function of traffic lanes in a (TSS)
to separate opposing streams of traffic for safer navigation
What does roundabout in GMDSS represent?
An area for the vessel to change course gradually.
How do precautionary areas differ from areas to be avoided?
Areas to be avoided are completely restricted to all vessel. While precautionary areas require extra
caution.
Areas to be avoided are completely restricted to all vessel. While precautionary areas require extra
caution.
The prevailing wind direction and frequency for each month
What is the benefit of using monthly charts in routing charts?
They allow mariners to consider seasonal variations in weather and currents.
What is the main purpose of load lines depicted on routine charts?
To show the maximum safe draft of a vessel based on its stability.
What are the typical scales used in Admiralty routing charts?
1:5,000,000, 1:10,000,000, and 1:20,000,000
What type of traffic is permitted in inshore traffic zone?
Only vessels with specific authorization or exemption.
How do routing charts assist bridge crew/navigators in high level route planning?
They cover large geographical areas, enabling strategic route selection.
What type of information does ADRS 1,3,4 and 5 provide to the navigators?
Assistance with routing, radio communications and safety information.
What is the main function of radio time signals for mariners?
To ensure accurate timekeeping and synchronization.
What is RNW (Radio Navigational Warning) used for?
To alert mariners about new navigational hazard and changes.
Which publication does not exist in the context of maritime radio communication?
Radio time signal book.
What does additional information does ADRS 2 offered compared to ADRS 1,3,4 and 5?
Positional and timekeeping references worldwide.
What are the primary channels through which radio navigational warnings are disseminated?
Area warnings and NAVTEX broadcast.
What type of information is NOT typically included in the admiralty list of radio signals?
Description of the capabilities and limitations of radio operators.
What limitations of maritime radio communication systems are explained in Pub. No. 117?
The range and effectiveness of various radio stations
