An overview of Notices to Mariners and how to use them

ADMIRALTY

10 Jul 201702:55

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📅 Record the date of new additions, new charts, or withdrawn charts as a permanent record in the chart maintenance record.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

00:00

🗺️ 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

Notices to Mariners are essential publications for maritime navigation that provide updates on navigational information. In the context of the video, they are the primary source for updating charts, ensuring that sailors have the most current information for safe navigation. The script mentions that these notices consist of textual information, tracings, and blocks, which all serve to communicate changes that need to be made to nautical charts.

💡Textual NMs

Textual NMs, or Naval Notices, are the written part of the Notices to Mariners. They are crucial as they contain detailed descriptions of the changes that need to be made to charts. The video emphasizes the importance of using these textual notices as the primary source for updating charts, as they provide the necessary details to apply updates accurately.

💡Tracings and Blocks

Tracings and blocks are graphical representations of the information found in textual NMs. They provide a visual aid to help sailors quickly and accurately apply updates to their charts. The video script explains that these visual aids are meant to be cross-referenced with the textual NMs to ensure that all changes are correctly implemented.

💡Cross-referencing

Cross-referencing is the process of comparing the information from different sources to ensure accuracy. In the video, it is mentioned as a critical step when applying updates to charts. Sailors must cross-reference the tracings and blocks with the textual NMs to guarantee that all updates are correctly applied.

💡Chart Number

The chart number is a unique identifier for each nautical chart. The script mentions that tracings display the chart number, which is essential for sailors to know which charts are affected by the updates and need to be revised.

💡New Chart or New Addition Date

This refers to the date when a new chart is issued or an addition is made to an existing chart. The script indicates that tracings display this date, which helps sailors track the timeliness of their charts and updates.

💡Grid for Quick Reference

The grid mentioned in the script is a small layout on the tracings that helps sailors quickly locate where the update should be applied on the chart. For instance, if a cross is in the lower left box of the grid, the update is to be made in the lower left corner of the chart.

💡Previous Update

Before applying a new update, it's important to ensure that the chart contains the previous update. The script mentions that tracings will also show the previous update, which sailors can verify by checking the NM number in the bottom left corner of the chart.

💡Magenta Pen

After applying an update, the script instructs sailors to use a magenta pen to write the notice number in the bottom left corner of the chart. This practice serves as a record of the completed update, distinguishing it from the NM numbers.

💡2B Pencil

A 2B pencil is used to cross through the appropriate NM number in the chart maintenance record (NP1 33A) to indicate that the update has been applied. The use of a pencil allows for easy correction if mistakes are made, as mentioned in the script.

💡NP1 33A

NP1 33A refers to a specific section in the paper chart maintenance record where sailors are instructed to record the updates. The script highlights the importance of recording the date of new additions, new charts, or withdrawn charts as a permanent record, which helps in maintaining an accurate and up-to-date chart.

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.