Posted on Leave a comment

An Overview of the Types of Nautical Charts

Would you like more information on the different kinds of nautical charts? Below are some details. Nautical charts can be very helpful for pilots. However, displaying it can sometimes become a problem. A keedox media player can help you upscale and view all types of nautical charts in detail. 

In the article below, we will learn about nautical charts and how is it useful.

The following table lists the types of nautical charts.

  • Interactive ocean and waterway charts provide a global overview
  • A pilot’s chart shows the passage of time and weather
  • Often called a planning diagram or scaled-down diagram
  • Following the coast and the general approach is the large scale chart
  • Harbor charts provide an overview of what’s happening at the harbor.

Charts of different types differ slightly from one another. Ask for assistance if necessary. Check out this guide on Nautical Charts. They come in many types, but not all of them are reliable.

Which Chart Type is Best for Your Needs?

Sailors usually refer to charts as navigation charts. A map of a river or ocean conveys information about depth, features under the surface, landmarks, and other details that are important to navigation. It functions rather like a map of the land.

Charts and navigational charts can be used to plan sailing routes and passages.


Most people refer to navigation charts as nautical charts. Simple as that. You can find maps of the oceans as well as the waterways.

Since boats do not travel on roads, a road map cannot be compared to a nautical chart. There are no off-road or cross-country roads or street names on a road map. Since the land is primarily composed of mountains, hills, and valleys, it may not be obvious that it has these features.

A marine chart does not show topographic contours but instead shows geographic features such as hills and valleys. Nautical charts are used by Navies to calculate deep water depths, island location, and shallow water depths. Sailing outside of the norm can be tricky, and sailors will benefit from knowing how the water moves below the surface.

A chart will show you all of the permanent landmarks that aid navigation, such as lighthouses, daylight marks, and buoys. In addition to wind and current information, a great deal of information is available about the positions of vessels.

As part of this lesson, we will look at the pros and cons of using paper and electronic navigation charts.


In oceans and vast stretches of water, sailing pilot charts are useful for determining the best routes and optimum times for sailing.

As early ships sailed the seas, weather information was collected and summarized into Pilot Charts, which provided rough predictions of ocean conditions. By providing information about the current conditions, wind, and weather, meteorologists assist planners in making informed decisions. In addition to forecasting larger trends, they can also figure out historical probabilities.


It is possible to determine the contents of a chart by looking at its baseline. Among the most important characteristics of a chart is the scale, which includes measurement units in feet and meters.

Ratios are displayed as scales in all charts. There are many with scales of 1:2500, while others have scales of 1: 1,000,000. Distances between chartered and real-world distances are compared. According to scales of 1:25,000, 25,000 inches are equivalent to one inch. 25,000 millimeters equal one inch on the same chart. No matter how the ratios are measured, the ratios in charts and reality are identical.

Small scales 

A sailing chart is one of three types: a sailing chart, general chat, or planning chart. These charts offer the most information while offering the least details. In general, chart scales can range from 1: 100,000 to 1: 500,000, while sailing charts can be 1: 100,000 to 1: 500,000. For instance, the following medium-scale chart shows:

  • A lower level of detail and more scale errors are present.
  • Plan your long-distance voyages and offshore passages using this software
  • A marker or hazard is not necessarily related to the government.
  • Our large-scale charts may be blanked out so that the areas of detail will appear.
  • There are no suitable approaches to harbors, nor are there close approaches to lands.
  • A wide area means that a broad survey is less frequently updated.
  • If we use the smallest scale, a chart’s positional error can change from 450 feet (150 meters) to a mile (1,500 meters).

Large scales

Coastal sailors are most interested in charts and approaches on coastal charts. Thanks to their high resolution and detail, these photos offer a clearer picture of hazards around the scene. The scale is 1:25,001-1,00,00,000.

These charts can serve as a good guide for planning any trip that is a day or two away from home.

Although small-scale charts have more detail, they still omit a few features for readability.

  • You can use this map when planning a trip along the coast or traveling long distances
  • A coastal chart is not uncommon in kit contents.
  • It would be a good idea to update Note to Mariners more often.
  • The scale error in a 100,000:1 chart may range from 25 feet (30m).

Chart of the seas

We should include every detail in large charts since it is nearly impossible to leave any out. 

The passage from your harbor approach to your final destination will be guided by navigation charts, such as harbor charts and berth charts. A scale range of 25,001 to 5000 is used on the charts.

  • Detailed descriptions of the hazards and features are provided.
  • To facilitate navigation after the approach has been completed,
  • Often found in chart kits, these small cutouts or insets are often included.

Errors or failures in the sale of products

In addition to showing the position of objects on the chart, the chart’s scale also indicates how much error can be tolerated. However, you should always use exact positioning when calculating charts, as this document does not address calculated errors. GPS navigation systems have highlighted the error factor, since older maps may have inaccurate information about which items are at the foot.

Draw a line with a sharp mechanical pencil, about .5mm in width. A printer’s pixels are typically .3mm wide, whereas computer pixels are typically .2mm wide. Although the pencil line is thin, it covers 500 meters of water on the general chart for 1: 1,000,000. In the harbor chart’s 1:5,000 scale, each pixel represents one square meter.

Leave a Reply

Your email address will not be published. Required fields are marked *