ALFS (ADMIRALTY LIST OF LIGHTS & FOG SIGNALS) Correction / Updation and How to use.

Summary

This training session covers how to effectively use and correct the ALFS (Aids to Navigation Light List). It explains the process of recording the receipt, updates, and corrections to ALFS, focusing on the importance of accuracy and organization. Key steps include identifying lighthouse characteristics, understanding regional divisions, and following a structured correction process. A detailed example is provided using the Horsebook Lighthouse, demonstrating the method for updating and maintaining the ALFS. The session ensures users can efficiently navigate and correct ALFS, maintaining its relevance and usability for maritime navigation.

Takeaways

• 😀 ALFS (Automated Light Finder System) is a document used to track and update light characteristics for navigation.
• 😀 The first step in using ALFS is to write the port and the date it was received.
• 😀 Each time an ALFS is updated, the update record should be written with the relevant week number.
• 😀 The ALFS document contains a table of contents and important sections like location and light number.
• 😀 The ALFS includes details on why it is used, with self-explanatory guidelines for each section.
• 😀 The ALFS contains 15 volumes, each marked with the corresponding information about the lighthouse and light number.
• 😀 The document explains how to use the ALFS and gives an overview of different types of lights and their characteristics.
• 😀 Symbols, luminous range diagrams, and abbreviation charts are provided to understand light signals and characteristics.
• 😀 The ALFS is divided by ocean region (e.g., Indian Ocean, South China Sea), with detailed lighthouse information for each region.
• 😀 To find a specific lighthouse, locate the page number, light number, and geographic coordinates (latitude and longitude).
• 😀 Corrections to the ALFS are made by cutting and pasting updates, ensuring that all corrections are logged chronologically by week and date.

Q & A

What is the purpose of an ALFS?

The purpose of an ALFS (Aid to Navigation List) is to provide detailed information about lighthouses, their characteristics, and updates to maritime navigation systems.

What should you do first upon receiving an ALFS?

Upon receiving an ALFS, the first thing you need to do is write down the port and date it was received.

What is included in the ALFS after the first page?

After the first page, the ALFS includes a record of updates where you paste the updates and note the week they were applied.

What is the significance of the table of contents in the ALFS?

The table of contents in the ALFS provides a structured overview of the document, guiding the user through different sections such as location, light numbers, and their characteristics.

How many volumes does an ALFS typically contain?

An ALFS typically contains around 15 volumes, each marking a specific geographic area or region.

What is the 'luminous range diagram' in the ALFS?

The luminous range diagram in the ALFS shows the light's visibility characteristics, helping to understand its reach and intensity.

What information can be found under the 'light number' section of the ALFS?

Under the 'light number' section, you'll find key details such as the light's name, location, characteristics, height, and visibility.

How are the ocean regions organized in the ALFS?

The ALFS organizes ocean regions by geographic area, such as the Indian Ocean, Gulf of Mana, and South China Sea, each with its own set of relevant lights and lighthouses.

How do you correct errors in an ALFS?

To correct errors in an ALFS, you must follow the 'Notices to Mariners' process, cutting out the incorrect information and pasting the corrected information in its place. Corrections should be done in chronological order.

What should be written when completing the corrections in the ALFS?

After completing the corrections, you should write the date and week number of the correction, such as '44/20' for the 44th week of 2020, and update the book accordingly.