WK 7 MOD 2 NAV6 LEC
Summary
TLDRIn this instructional video, Second Mate Everesto R. Feliciano guides viewers through the operational use of an Electronic Chart Display and Information System (ECDIS), focusing on the integration of the Automatic Radar Plotting Aid (ARPA) for collision avoidance. He explains the importance of radar overlay for position verification, the benefits of using ARPA in conjunction with visual bearings, and the distinctions between information layers, user chart layers, and event graphics. The lecture also covers the display categories of ECDIS and the significance of each layer for safe navigation.
Takeaways
- đ The primary use of ARPA (Automatic Radar Plotting Aid) in conjunction with visual bearings is to establish potential collisions and assist in navigation.
- đ The radar overlay on an ECDIS (Electronic Chart Display and Information System) allows for a quick cross-check of the ship's position against ground field objects and the electronic chart.
- â ïž If the radar picture and electronic chart do not match, it indicates a potential error in the ship's GPS or horizontal datum.
- đĄ The radar overlay serves as a second independent position fixing system, helping to detect and correct course or position errors.
- đ°ïž Navigators should periodically overlay the radar on the ECDIS to check for possible navigation errors.
- đą ARPA overlay benefits include collision avoidance, easier target identification, and minimizing radar-specific limitations.
- đ The overlay of radar and chart images serves to verify each other, reducing the chance of human error.
- đ System redundancy is enhanced by the integration of radar and ECDIS, providing flexibility and backup navigation capabilities.
- đ The watch officer must be vigilant and observe the original radar to ensure that targets are being tracked and displayed correctly.
- đșïž ECDIS display categories include Display Base, Standard Display, and All Layer Category, each offering different levels of detail for navigation.
- đ The Display Base provides the minimum information not intended for safe navigation, while the Standard Display includes necessary details for navigational use.
- đ The All Layer Category offers additional details on demand, such as soundings, submarine cables, and pipeline details, enhancing comprehensive navigation.
Q & A
What is the main purpose of the ARPA overlay in navigation?
-The main purpose of the ARPA (Automatic Radar Plotting Aid) overlay in navigation is to allow a quick cross-check of the ship's position. It helps in identifying discrepancies between the radar picture and the electronic chart, indicating potential errors in the ship's GPS or horizontal datum.
How does the radar overlay on an ECDIS (Electronic Chart Display and Information System) assist in collision avoidance?
-The radar overlay on an ECDIS assists in collision avoidance by providing a continuous and easy-to-use radar picture where radar takes the role of a second independent position fixing system. It allows for the detection of errors and the identification of targets in the area of safe water available for collision avoidance maneuvers.
What are the benefits of using radar overlay in conjunction with ECDIS?
-The benefits of using radar overlay with ECDIS include enhanced collision avoidance, improved target identification, minimization of radar-specific limitations, detection of false fairways, error detection due to different reference systems, reduction of human errors, reduced workload, and enhanced system redundancy and flexibility.
What is a 'double reader picture' and why is it significant in navigation?
-A 'double reader picture' refers to the overlay of the radar image on the electronic chart. It is significant because if the radar picture and the electronic chart do not match, it indicates that the ship's position might be incorrect, providing a clear indication of a potential error in navigation.
How can the radar overlay help in detecting errors in the ship's position?
-The radar overlay can help in detecting errors in the ship's position by showing discrepancies between the radar image and the electronic chart. Differences such as translation offset or rotation offset can indicate position errors, course errors, or sensor data errors.
What is the role of the officer of the watch when using the radar overlay?
-The officer of the watch should activate the radar overlay on the ECDIS to check for possible errors in navigation. They must also be vigilant and observe the original radar to ensure that targets not acquired by the radar system are not missed, as this could be extremely dangerous.
What are the different display categories in an ECDIS?
-The different display categories in an ECDIS are the Display Base, Standard Display, and All Layer Category. These categories provide varying levels of information, from the minimum necessary for navigation to all available details on demand.
What information is typically included in the Display Base layer of an ECDIS?
-The Display Base layer includes the minimum information on the chart, such as coastline, ship safety contour, isolated water, water danger, oscillator danger, scale, range, North Arrow, and units of depth and height.
What is provided in the Standard Display layer of an ECDIS?
-The Standard Display layer provides the minimum information necessary for navigational use, including voice beacons, peak structures, boundaries, parallel channels, rivers, prohibited and restricted areas, chart scale boundaries, ship routing systems, and traffic separation schemes.
What additional information can be displayed in the All Layer Category of an ECDIS?
-The All Layer Category can display additional information on demand, such as sample spot soundings, submarine cable and pipeline details, details of isolated dangers, magnetic variation, reticule place names, and other detailed chart information.
How can the officer of the watch ensure the accuracy of the navigational data?
-The officer of the watch can ensure the accuracy of the navigational data by periodically overlaying the radar on the ECDIS display to check for discrepancies. They should also be attentive to the original radar to verify the information displayed on the ECDIS and to detect any potential errors.
Outlines
đ ARPA Overlay for Collision Avoidance and Position Verification
In the first paragraph, the instructor, Second Mate Everesto R Feliciano, introduces the midterm week 7 of the module on the operational use of the Electronic Chart Display System (ECDIS). The main focus is on the use of ARPA (Automatic Radar Plotting Aid) in conjunction with visual bearings and other means to detect potential collisions. The ARPA overlay is highlighted as a crucial safety feature that enables a quick cross-check of the ship's position against ground field objects. If there's a mismatch between the radar picture and the electronic chart, it indicates a possible error in the ship's GPS or horizontal datum. The radar overlay serves as a second independent position fixing system, allowing for the detection of errors that might otherwise go unnoticed. The benefits of the radar overlay include collision avoidance, target identification, radar performance enhancement, and false fairway detection. It also helps in reducing human errors and workload, providing an integrated display that enhances system redundancy and flexibility.
đ Target Identification and Display Categories in ECDIS
The second paragraph delves into the benefits of target identification using radar in conjunction with chart information, which facilitates easier identification of radar targets. The instructor discusses the radar's specific limitations and how they are minimized when used in an integrated display. The paragraph also covers the detection of ships traveling on the wrong side of traffic separation zones and the importance of error detection caused by different reference systems or sensor data. The mutual check between the radar and chart images is emphasized to reduce human errors, which can be common due to fatigue or oversight. The paragraph concludes with a discussion on the benefits of system redundancy, flexibility, and the automatic tracking of radar targets, warning about the dangers of not displaying the original radar video during navigation.
đș Understanding ECDIS Display Categories for Safe Navigation
In the third paragraph, the focus shifts to the ECDIS display categories, which are crucial for safe navigation. The instructor explains the three categories: Display Base, Standard Display, and All Layer Category. The Display Base contains the minimum information required for the chart, such as coastline, ship safety contour, isolated water, and other essential navigational elements. The Standard Display provides additional information necessary for navigation, including beacons, navigational structures, boundaries, and routing systems. The All Layer Category includes detailed information displayed on demand, such as soundings, submarine cables, pipelines, and place names. The paragraph concludes with instructions for teaching and learning activities, including recitation, question and answer sessions, and assignments, with a reminder of the upcoming quiz.
Mindmap
Keywords
đĄARPA
đĄElectronic Chart Display System (ECDIS)
đĄCollision Avoidance
đĄRadar Overlay
đĄPosition Fixing
đĄNavigational Use
đĄDisplay Layer
đĄTarget Tracking
đĄError Detection
đĄRedundancy
đĄUser Chart Layers
đĄEvent Graphic
Highlights
Midterm week 7 begins with a focus on the operational use of electronic chart display systems.
Instructor Second Mate Everesto R Feliciano introduces the learning outcome to use ARPA with visual bearings.
Discusses the importance of ARPA in establishing collision risks and taking over watch duties.
Differentiates between information layers, user chart layers, and event graphics.
Explains the standard safety function of radar overlay in navigation.
Radar overlay allows for quick cross-checking of the ship's position against electronic charts.
Misalignment between radar and chart indicates potential errors in ship's position or GPS.
Radar overlay provides an independent position fixing system to detect course errors.
Discusses the benefits of radar overlay for collision avoidance and target identification.
Radar performance limitations are minimized when used with electronic charts.
False Fairway detection is possible with radar overlay, identifying ships in wrong traffic zones.
Mutual check between radar and chart data reduces human error in navigation.
Radar overlay reduces workload by providing automatic tracking of radar targets.
System redundancy and flexibility are enhanced with radar overlay.
The importance of vigilance in observing the original radar is emphasized.
Introduces the three display categories: display base, standard display, and all layer category.
Describes the features of the display base, which includes minimum information for navigation.
Outlines the standard display features necessary for safe navigation.
Details the all layer category, which includes additional details displayed on demand.
Assignments and quiz preparation are discussed for upcoming teaching and learning activities.
Transcripts
hello good day gentlemen we are now on
our midterm week 7 the start of your
module two week seven still in
navigation 6 operational use of
electronic chart display system
again I am your instructor I'm second
mate everesto R Feliciano all right our
learning outcome is to determine the use
of arpa in conjunction with visual
bearing and other means to establish
there is a collision and taking over the
watch and differentiate between
information layers
user chart layers and event graphic so
the truck Target arpa overlay we are
going to discuss and this is a standard
safety function of at least including in
the included in the display layer so
let's start with the arpa overlay
now the most important navigation use of
the Actis radar overlay is that it
allows a quick Cross check
of the ship's position
so if ground field objects are suitable
as suitable Coastline or other reference
Target of the radar picture and of
electronic chart do not match
that is double reader picture is shifted
this is a clear indication that the
ship's position
such as GPS potentially the rice
horizontal datum is not
correct or in error
so allowing the radar overlay in our egg
disk allows this quick Cross check of
the ships
position
so as in our display
it will be looking like that allowing
the radar overlay on our
Agnes
so in practice the egg this radar
overlay provides continuous and easy to
use radar peaks in rare in which radar
takes the roll of a second independent
position fixing system
so if the two picture were rotated
against each other such as three degrees
of course error would become apparent
generally differences between chart and
radar image provide a chance to detect
errors which otherwise might might not
have been detected at all so
the radar overlay and the chart
is a
is compared and the difference called
the
could indicate an error
of the position of our actors
so the Navigator should at least from
time to time overlay the radar on the
exist to display to check his navigation
if there is a possible error
okay such as saw
uh
the officer of the watch should activate
radar overlay
Lugar
Patong and overlay
on the apartment radar video starting at
this chart
so possible error such as a translation
offset there is a position error medium
overlayed
or there is a large discrepancy so there
might be a position error another is the
rotation offset
where there might be a course
error
if the rotation if there is a rotation
offset so Indian direction is a so that
could be another error that is records
error
so there are benefits of at least Raider
over Lane
attention such as collision avoidance
where targets and the area of Safe Water
available for collision avoidance
maneuver apparently in one display so
parang two in one yeah
radar as at this in one display
for collision avoidance
now Target identification is also one
radar targets can be more easily
identified when viewed together with
chart information
okay so young Target Mega some
information on this my identified Target
again other benefits are the radar
performance the radar specific
limitation poor resolution savings are
minimized foreign
okay
another
benefits is the false Fairway detection
on ships traveling on the wrong side of
the traffic separation zone can be
recognized as such a penis
so that can be recognized in the eclipse
instantly
okay error detection error caused by
different reference system sensor data
can be easily recognized on an
integrated display
together with the at this radar overlay
now Maryland
Mutual check the overlaying English and
radar image serves to verify one another
so they check each other if there are
errors
so it also reduce errors human errors
are reduced
so due to maybe
butting or a lack of sleep
so it will use our error
to
in checking the data so the data will be
available for us already
reduce also reduce workload it is the
load of the observe the one that needs
to be manually
calculated
calculate manually this will provide it
already and also the radar
arpa information
okay the system redundancy flexibility
and redundancy of the two system are
enhanced
redundancy
[Music]
um
okay
so the radar system can track the
movement of the radar Target
automatically
by acquiring the Target on the radar
manually or automatically by the radar
it must be manually or automatically
tracked
radar can be overlay also in the Actis
Market however targets not acquired are
not displayed in acquire in the muddy
display on Pandora
so this is extremely dangerous if the
old radar video is not displayed because
in the morning
activities
so the watch officer must be vigilant
and observe the original radar
foreign
so so much for the radar overlay we go
now to the egg this display category so
there are three display categories
and this also involves the display layer
these are the display base
standard display and all layer category
display
so on transas act these three categories
are selected from the chart menu path of
the task list so in task list
okay that is just the example you open
the chart panel by selecting it on the
line of the task list menu on the
controller panel so usually as a right
side on the control panel and you you
can select that
Young
tabs yeah
on the lower bar
okay
now
these layers as we have uh as we are
discussing is the display base
this is the first layer actually it is
on the bottom
and this is the minimum information on
the chart but not intended for safe
navigation so example of these are the
coastline on ship safety Contour
isolated water and the water danger
oscillator danger not necessarily
underwater
structure scale range North Arrow
and units of depth and height
and display mode
okay in display Mode Nothing
okay
now other uh those are just examples
the next layer will be the standard
display this is provided with the
minimum information for navigational use
for example I in this place not display
based on a standard display voice
beacons or other age to navigation and
Peak structures boundaries and parallel
channels and rivers
okay prohibited and restricted areas
chart scale boundaries ships routing
systems
ships routing system very roots
uh
also archipelagic
sea Lanes
so this these are examples of the
standard
display okay including also the uh
traffic separation scheme
uh TSS
also we have the last layer or the all
layer category which is to be displayed
on demand so this is selectable by the
pressure of the watch it to be included
on top of the standard display on top of
the base display so we have sample spot
sounding submarine cable pipeline
details of isolated dangers details of
age to navigation magnetic variation
reticule place names Etc
okay so you will see that once you
operate the
the Actis on our lab
so we can identify what we are talking
about here
all right
gentlemen
okay for our teaching and learning
activities so we have the recitation
question and answer
so I have a question yeah with regards
to this lecture so you have to answer
that in as us our presentation to be
written on a piece of paper
and of course you have quiz and an end
or assignment so for now we will start
with the assignment so next meeting will
be your quiz
so next meeting will be recitation and
quiz now is only recitation and
assignment so
check the activities and the and also
read the instruction gentlemen
all right thank you very much I'm a good
day gentlemen
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