An overview of Notices to Mariners and how to use them
Summary
TLDRThe video script discusses the process of updating nautical charts using Notices to Mariners (NMs). It emphasizes the importance of cross-referencing textual NMs with graphic tracings and blocks for accurate updates. Upon receiving NMs, one should identify affected charts, record NM numbers, and apply updates using tracings or NM blocks. Tracings come in A4 or A5 sizes, indicating chart numbers, update locations, and previous updates. After applying updates, use a magenta pen to record the NM number on the chart and cross out the applied NM in the maintenance record to avoid confusion.
Takeaways
- ⚓️ Notices to Mariners (NMs) are crucial for updating nautical charts and consist of textual information and graphic tracings or blocks.
- 📜 Textual NMs are the primary source for chart updates, while tracings and blocks provide a visual representation of the textual NMs.
- 🔄 It's essential to cross-reference tracings and blocks with the textual NMs to ensure all updates are applied correctly.
- 🗂️ Upon receiving NMs, identify affected charts and record the relevant NM number in pencil in the chart maintenance record (NP133A).
- 📅 Record the date of new additions, new charts, or withdrawn charts as a permanent record in the chart maintenance record.
- 📝 Updates can be applied using tracings or NM blocks, which come in two sizes: A4 or A5.
- 📍 Tracings include a small grid for quick reference of the update location on the chart and show the previous update for verification.
- ✅ After applying an update, use a magenta pen to write the NM number in the bottom left corner of the chart to record the update.
- 🖊️ If the update has a year date, underline it to differentiate it from an NM number.
- ✏️ Cross through the appropriate NM number in NP133A with a 2B pencil to indicate that the update has been applied.
Q & A
What are the primary sources for updating a chart according to the transcript?
-The primary source for updating a chart is the textual Notices to Mariners (NM).
What is the purpose of the tracings and blocks in Notices to Mariners?
-Tracings and blocks show the information from the textual NM in a graphic form to help apply updates quickly and accurately.
Why is it important to cross-reference the tracings and blocks with the textual NM?
-Cross-referencing ensures that all changes are applied correctly on the charts.
What should you do upon receipt of new Notices to Mariners items?
-Identify affected charts, record the relevant NM number in pencil against the chart number in your paper chart maintenance record (NP 133A), and enter the date of new additions or withdrawn charts as a permanent record.
What are the two sizes in which tracings are produced?
-Tracings are produced in two sizes: A4 and A5.
What information does a tracing display, and how does it help in updating a chart?
-A tracing displays the chart number, the new chart or new addition date, and a small grid for quick reference of where the update is located on the chart.
How can you ensure that a chart contains the previous update before applying a new one?
-Check the NM number in the bottom left corner of the chart to ensure it contains the previous update.
What should you do after applying an update using a tracing?
-Write the notice number in the bottom left corner of the chart using a magenta pen to record the completed update.
How should you mark the updates in your paper chart maintenance record (NP 133A) after applying them?
-Cross through the appropriate NM number in NP 133A using a 2B pencil to show the update has been applied.
What does it mean to underline the year date when applying an update, and why is it done?
-Underlining the year date signifies that it is not an NM number, preventing confusion with the NM numbers.
Outlines
🗺️ Navigating Notices to Mariners for Chart Updates
The paragraph outlines the process for updating nautical charts using Notices to Mariners (NMs). It emphasizes the importance of cross-referencing textual NMs with graphic tracings and blocks to ensure accurate updates. Upon receiving NMs, one should identify affected charts, record NM numbers in pencil, and maintain a permanent record of updates. Tracings come in A4 or A5 sizes, displaying chart numbers, update dates, and grid references for quick location. It's crucial to verify the presence of previous updates before applying new ones. After applying an update, the NM number should be written in magenta pen, and the applied NM number should be crossed out in pencil in the chart maintenance record to indicate completion.
Mindmap
Keywords
💡Notices to Mariners
💡Textual NMs
💡Tracings and Blocks
💡Cross-referencing
💡Chart Number
💡New Chart or New Addition Date
💡Grid for Quick Reference
💡Previous Update
💡Magenta Pen
💡2B Pencil
💡NP1 33A
Highlights
Notices to Mariners are essential for updating charts and consist of textual NMs, tracings, and blocks.
Textual NMs are the primary source for chart updates.
Tracings and blocks graphically represent textual NM information for quick and accurate updates.
Cross-referencing tracings and blocks with textual NMs ensures correct application of changes.
Upon receipt of updates, identify affected charts and record the relevant NM number in pencil.
Record the date of new additions, new charts, or withdrawn charts as a permanent record.
Updates can be applied using tracings or NM blocks.
Tracings are available in two sizes, A4 or A5, and display chart number, new addition date, and a grid for reference.
Tracings indicate the location of the update on the chart with a small grid.
Before applying an update, ensure the chart contains the previous update by checking the NM number.
After applying an update, record the notice number in the bottom left corner of the chart with a magenta pen.
If the update is a year date, underline it to avoid confusion with an NM number.
Use a 2B pencil to cross through the appropriate NM number in NP1 33A to indicate the update has been applied.
Maintain a paper chart maintenance record for tracking updates and changes.
The process of updating charts is crucial for maritime navigation safety.
Chart updates must be applied accurately to reflect the latest maritime information.
NM numbers are a key reference for tracking the sequence of chart updates.
The use of magenta pen and pencil markings standardizes the update recording process.
Transcripts
notices to Mariners consist of textual
nms tracings blocks and
notes the textual nm's are your primary
source for updating a
chart the tracings and blocks show the
information from the textual NM in a
graphic form so that you can apply the
updates quickly and
accurately it's important to always
cross reference the tracings and blocks
with the textual NM to ensure all
changes are applied
correctly on receipt of these items
identify which of your charts are
affected and record the relevant NM
number in pencil against the chart
number in your paper chart maintenance
record n
p133a the date of new additions new
charts or withdrawn charts should be
entered in Inc as a permanent record
updates can then be applied with the use
of tracings or NM
blocks tracings are produced in two
sizes either A4 or
A5 each tracing displays
the chart number the new chart or new
addition date and a small grid for quick
reference of where the update is located
on the chart for example if the cross is
in the lower left box then the update
will be in the lower left corner of the
chart the tracing will also show the
previous
update before you apply any new update
it's important an to make sure that the
chart contains the previous update you
can do this by checking the NM number in
the bottom left corner of the
chart after applying an update using a
magenta pen write the notice number in
the bottom leftand corner of the chart
to record the completed
update if applying a year date underline
it so that it won't be confused with an
NM
number finally using a 2B pencil cross
through the appropriate NM number in np1
33a to show the update has been
applied
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