WK 7 MOD 2 NAV6 LEC

Summary

In 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

• 📍 The primary use of ARPA (Automatic Radar Plotting Aid) in conjunction with visual bearings is to establish potential collisions and assist in navigation.
• 🔍 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.
• ⚠️ If the radar picture and electronic chart do not match, it indicates a potential error in the ship's GPS or horizontal datum.
• 📡 The radar overlay serves as a second independent position fixing system, helping to detect and correct course or position errors.
• 🛰️ Navigators should periodically overlay the radar on the ECDIS to check for possible navigation errors.
• 🚢 ARPA overlay benefits include collision avoidance, easier target identification, and minimizing radar-specific limitations.
• 🔄 The overlay of radar and chart images serves to verify each other, reducing the chance of human error.
• 🔄 System redundancy is enhanced by the integration of radar and ECDIS, providing flexibility and backup navigation capabilities.
• 👀 The watch officer must be vigilant and observe the original radar to ensure that targets are being tracked and displayed correctly.
• 🗺️ ECDIS display categories include Display Base, Standard Display, and All Layer Category, each offering different levels of detail for navigation.
• 📈 The Display Base provides the minimum information not intended for safe navigation, while the Standard Display includes necessary details for navigational use.
• 📚 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

00:00

📍 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.

05:01

🔍 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.

10:05

🗺 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.

Keywords

💡ARPA

ARPA stands for Automatic Radar Plotting Aid, a system used in maritime navigation to track the movement of other vessels and predict potential collisions. In the video, ARPA is discussed in conjunction with visual bearings and other means to establish the risk of collision, highlighting its importance in navigation safety and operational use of electronic chart display systems.

💡Electronic Chart Display System (ECDIS)

ECDIS is a navigation system that displays nautical charts electronically, providing real-time information to aid in navigation. The script mentions the operational use of ECDIS, emphasizing its role in modern maritime navigation, including the overlay of radar data for enhanced situational awareness.

💡Collision Avoidance

The concept of collision avoidance refers to the proactive measures taken to prevent ships from colliding with each other. The script discusses the benefits of using ARPA and ECDIS in conjunction for collision avoidance, as they can help identify potential threats and navigate safely.

💡Radar Overlay

Radar overlay is a feature that allows the radar image to be superimposed on the nautical chart, providing a more comprehensive view of the surrounding environment. The script explains how this feature can help in quickly cross-checking the ship's position and detecting errors in navigation.

💡Position Fixing

Position fixing is the process of determining the exact location of a vessel. The script mentions that the radar overlay provides an independent position fixing system, which can help in verifying the accuracy of the ship's GPS position.

💡Navigational Use

Navigational use refers to the application of tools and systems to safely navigate a vessel. The script emphasizes the minimum information required for navigational use, such as voice beacons, peak structures, and boundaries, which are part of the standard display layer in ECDIS.

💡Display Layer

The display layer in the context of ECDIS refers to the different levels of information that can be shown on the screen, such as base, standard, and all layers. The script discusses how these layers can be selected to customize the information displayed for safe navigation.

💡Target Tracking

Target tracking is the process of monitoring the movement of other vessels or objects using radar. The script explains how ARPA can automatically track radar targets, which is crucial for collision avoidance and maintaining situational awareness.

💡Error Detection

Error detection in the script refers to the identification of discrepancies between the radar image and the electronic chart, which can indicate potential navigation errors. The radar overlay is used to cross-check and verify the ship's position, helping to detect and correct errors.

💡Redundancy

Redundancy in this context means having backup systems or methods to ensure the reliability of navigation tools. The script mentions the benefits of radar overlay in enhancing system redundancy, providing an alternative means of tracking and navigation.

💡User Chart Layers

User chart layers are customizable layers in ECDIS that allow users to add or modify information displayed on the chart. The script differentiates between information layers and user chart layers, indicating the flexibility users have in tailoring the display to their needs.

💡Event Graphic

Event graphic refers to the visual representation of events or data on the ECDIS, such as the predicted paths of vessels. The script mentions event graphics in the context of differentiating between types of layers and information displayed on the system.

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