An explanation of equipment and tools used when updating an ADMIRALTY Standard Nautical Chart

Summary

This video guides viewers through the essential equipment and tools required for accurately updating ADMIRALTY Standard Nautical Charts. It covers various pens, pencils, rulers, and other specialized instruments, emphasizing their specific uses and the importance of maintaining an accurate record of updates.

Highlights

Pens for Chart Updates00:00:17

Use a light, fast, waterproof permanent pen with violet or magenta ink. A 0.25 nib is suitable for deletions and inserting chart limits, while a 0.18 nib is best for insertions like light descriptions. Avoid blue, black, or red ink, as red disappears under red lighting used on ships at night.

Pencils and Erasers00:01:02

A 7H pencil is for pinpointing positions, and a 2B pencil is used for normal chart work and guidelines. An eraser is necessary for removing pencil marks, and a scalpel can be used for scratching out details if mistakes are made.

Adhesive for Attachments00:01:40

A good quality glue is essential for neatly and permanently attaching blocks, notes, and tables onto charts.

Plotting and Measuring Tools00:01:53

Rolling and stepping rules are used for plotting chart updates from textual NMs. Bow dividers offer more sensitive and accurate positioning. A 12 or 18-inch plastic ruler is for drawing straight guidelines, lines, and insertion deletion lines. A compass with a pen attachment is for drawing large circular areas.

Specialized Drawing Tools00:02:38

A hacksaw blade (with 14 teeth per inch/2.5 cm) can be used to draw the symbol for a cable. A steel straightedge is useful for finding positions, and a template with various hole sizes is for drawing symbols like radio reporting points, pilots, and small circular areas.

Chart Maintenance Record00:03:13

The NP 133A publication, the paper chart maintenance record, is crucial. It lists every chart numerically and is used to record updates by their NM number. Maintaining an up-to-date record is vital to avoid losing track and missing necessary updates.