Intro

Text Contents

Graphics Contents

Tides
    Dragging
    Sample Photo
    Sample Text Window

Buoys
    As Seen On Charts
    Sample Photo
    Another Sample

Annotated Photographs
    Example
    Sample Detail

Sample Data: Rocks
    Sample Photo

Chart Notes: Rocks
    ...continued

Light Animations

Plotting Tutorials
    Tips
    Details

Hydrographic Offices

Search English Terms

Search International Terms
    Spanish

Help Functions
    How to Find...

CHART MANUAL

Every Detail Is Importantant


Corner of a pier and bow of an empty ship along side it.
Tour graphics are heavily compressed for faster loading. Originals are larger and sharper.

A small change in a chart symbol can mean a very large change in what the symbol represents. Rock symbols are a particularly good example of that, as shown in the next section of this tour. In other words, chart symbols are very literal in their meanings and applications. Here we illustrate that by showing how two significant features of what we can see on the water way are reproduced on the chart.

A tiny circle is the symbol of a "dolphin," which is a bundle of piles. In other words, marks and shapes on a chart are almost never decoration, they mean something, and Chart Trainer is where you look to see what they mean.

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