World Chart

Introduction

A world chart provides a global representation of the world's oceans, seas and major maritime areas. Unlike a coastal or harbour nautical chart, which is designed to represent a limited area in detail, a world chart allows sailors to visualise the main oceans, continents, maritime routes and major sailing regions on a single sheet.

It is particularly useful for planning an ocean passage, considering a long-distance cruising project, visualising a round-the-world sailing route or simply understanding the geographical organisation of the world's maritime areas. A world chart makes it possible to locate major transatlantic and transpacific routes, strategic passages and major international maritime regions.

A world chart can therefore be used by sailors planning an offshore or round-the-world voyage, sailing schools, merchant shipping professionals, teachers or anyone looking for a clear and comprehensive representation of the world's maritime geography.

What Is a Marine World Chart?

A world chart represents the Earth's surface on a single cartographic document. In its maritime form, it places particular emphasis on oceans, seas, major geographical areas and principal navigation regions.

Depending on the chart, it may show:

• the Atlantic Ocean;

• the Pacific Ocean;

• the Indian Ocean;

• the Arctic Ocean;

• the Southern Ocean;

• the Mediterranean Sea;

• the North Sea;

• the Baltic Sea;

• the Caribbean Sea;

• the Red Sea;

• the China Seas;

• the main ocean routes.

Depending on the type of world chart, it may also show latitude and longitude, major ports, maritime passages, interoceanic canals, shipping routes or selected geographical and maritime information.

A marine world chart is therefore primarily a planning and overview document. It provides a global perspective that cannot be obtained from a large-scale coastal nautical chart.

What Is a World Chart Used for by Sailors?

The main advantage of a world chart for sailors is that it provides an overall view of a navigation project.

Before preparing the detailed charts required for an ocean passage, it is useful to visualise the entire route. A sailor planning a passage from Europe to the Caribbean, for example, can locate the North Atlantic, the Azores, Madeira, the Canary Islands, Cape Verde, the Lesser Antilles and the main transatlantic routes.

For a round-the-world sailing project, a world chart helps to understand the sequence of major ocean areas: Atlantic Ocean, Caribbean Sea, Panama Canal, Pacific Ocean, Southeast Asia, Indian Ocean, Red Sea, Suez Canal and Mediterranean Sea.

It does not replace the detailed nautical charts required for navigation and passage planning. Instead, it provides a general planning document that allows the navigator to move progressively from a global overview to detailed preparation for each maritime area.

World Charts and Ocean Passage Planning

Planning an ocean passage generally begins with a global representation of the route. A world chart makes it possible to identify the sequence of seas and oceans to be crossed and to locate the main strategic passages.

For an Atlantic crossing, for example, it can be used to visualise routes between Europe, the Azores, Madeira, the Canary Islands, Cape Verde and the Caribbean.

For a Pacific crossing, it shows the major island groups of Polynesia, Melanesia and Micronesia, as well as the enormous distances between Panama, the Galápagos, the Marquesas, Tahiti, Tonga, Fiji, New Caledonia, Australia and New Zealand.

In the Indian Ocean, it helps place the Seychelles, Maldives, Mauritius, Réunion, Madagascar, the East African coast, the Gulf of Aden and the Red Sea within their wider maritime context.

This global perspective is particularly useful when preparing a long-distance sailing project.

The Major Oceans Shown on a World Chart

The Atlantic Ocean plays a major role in international navigation. It connects Europe, Africa, North America, the Caribbean and South America. Ports such as Le Havre, Brest, Lisbon, Las Palmas, Mindelo, Fort-de-France, Bridgetown, New York and Miami are all located within this vast maritime area.

The Pacific Ocean is the largest ocean on Earth. A world chart makes it possible to appreciate the enormous distances between the American coast, Polynesia, New Caledonia, Australia, New Zealand and Asia. Ports such as Panama, Balboa, Papeete, Nouméa, Auckland, Suva, Honolulu and Sydney can be placed within this wider geographical context.

The Indian Ocean connects Africa, the Middle East, India, Southeast Asia and Australia. Maritime routes passing around the Cape of Good Hope, Madagascar, the Seychelles, Sri Lanka, the Strait of Malacca and Singapore illustrate its importance for international navigation.

The Arctic Ocean and northern seas also have a particular place in world cartography, especially for sailors interested in polar routes, Greenland, Iceland, the Norwegian Sea and the Northwest Passage.

Seas and Strategic Maritime Passages

A world chart also helps explain the importance of the principal maritime passages.

The Panama Canal connects the Atlantic and Pacific Oceans and is a major passage for ships and sailing vessels undertaking interoceanic voyages.

The Suez Canal connects the Mediterranean Sea with the Red Sea and is an essential route between Europe and the Indian Ocean.

The Strait of Gibraltar provides the link between the Atlantic Ocean and the Mediterranean Sea. The Strait of Malacca is a major passage between the Indian Ocean and the seas of Southeast Asia.

Other important passages can also be identified on a global chart, including the Strait of Magellan, Cape Horn, the Bering Strait, Bab-el-Mandeb, the Strait of Hormuz and the Sunda Straits.

These geographical features help explain why certain maritime routes are preferred and how the configuration of the continents influences ocean passages.

World Chart for a Round-the-World Sailing Voyage

For a sailor planning a circumnavigation, a world chart is an excellent visual planning tool.

It allows the overall route to be plotted and the major stages to be identified: departure from Europe, Atlantic crossing, Caribbean navigation, Panama Canal, Pacific crossing, sailing in Polynesia and Melanesia, passage towards Australia and the Indian Ocean, followed by the return towards Europe.

It can also be used to compare different route options before moving on to detailed nautical charts.

For a family sailing project or a long-distance catamaran cruise, a world chart can also provide a useful way of explaining the overall geography of the voyage and its different stages to the crew.

SHOM and Admiralty World Charts

Nautic Way Maritime Bookshop offers world charts and planning charts from publishers including SHOM and Admiralty. SHOM publishes world maps intended for global geographical representation, while Admiralty, produced by the United Kingdom Hydrographic Office, provides planning charts covering the world's oceans and major maritime areas.

Admiralty's chart portfolio includes ocean and planning charts for major areas such as the Atlantic and Pacific Oceans and other large maritime regions. Such documents are particularly useful when planning long-distance ocean routes.

Imray also publishes overview and planning charts as well as a large range of charts for coastal navigation, passages and approaches. Its charts are based on official hydrographic office data and supplemented with information intended for small-craft navigation.

From a World Chart to Detailed Nautical Charts

A world chart provides the first level of geographical representation. Once the general area has been identified, the navigator must move on to charts appropriate for each stage of the voyage.

For an Atlantic crossing, it may be necessary to use planning charts, passage charts and then coastal and approach charts for the destination ports.

For Mediterranean navigation, a world chart makes it possible to identify the general area before selecting charts covering France, Spain, the Balearic Islands, Italy, Greece, the Adriatic Sea or Turkey.

The same principle applies to the Caribbean, Indian Ocean, Pacific Ocean or northern European waters.

The selection of a nautical chart should therefore always take into account the geographical area, scale, level of detail and intended purpose.

A Global Chart for Maritime Education and Geography

Beyond navigation, a world chart also has genuine educational value. It provides a clear way of understanding the geographical organisation of the world's maritime areas and the importance of oceans in international trade and navigation.

It can be used to locate major commercial and cruising ports, principal straits, canals, archipelagos and major maritime routes.

For sailing schools, training centres, yacht clubs and maritime educational institutions, a world chart can therefore serve as a teaching aid for explaining maritime geography, distances and the main routes used by long-distance sailors and commercial shipping.

It can also support the study of celestial navigation, ocean currents, prevailing winds, shipping routes and the history of maritime exploration.

A Global Overview, Not a Coastal Navigation Chart

It is important to distinguish a world chart from a nautical chart designed for precise navigation.

At a global scale, representing the Earth's surface requires a cartographic projection that necessarily introduces certain distortions. A world chart therefore cannot replace a detailed nautical chart for a harbour approach, a passage through a channel, navigation among shoals or crossing an area containing navigational hazards.

For actual navigation, charts must be selected according to the area, scale and level of accuracy required. The world chart is used beforehand, for general planning and understanding the overall geographical context of a voyage.

Criteria for Choosing a World Chart

Several criteria can be considered when selecting a world chart suitable for a particular purpose:

• the geographical area represented;

• the cartographic projection;

• the level of maritime information;

• the representation of oceans, seas and major passages;

• the indication of maritime routes;

• the chart format and dimensions;

• the paper medium and method of presentation;

• the language and cartographic conventions used;

• the intended purpose: navigation, education, planning or maritime reference.

A world chart intended for a round-the-world sailing project will not necessarily meet the same requirements as one used in a navigation school or one intended to illustrate maritime geography in an office or classroom.

Conclusion

A marine world chart provides a global view of the world's oceans, seas and major maritime routes. It makes it possible to locate the principal ocean basins, international ports, archipelagos, canals and straits that structure global navigation.

It is particularly useful for planning a transatlantic or transpacific passage, organising a round-the-world sailing project, understanding major maritime routes or teaching nautical geography.

World charts from SHOM and Admiralty meet different requirements for global representation and ocean planning. They can be supplemented by more detailed nautical charts from publishers and hydrographic organisations such as Admiralty, SHOM, Imray and NV Charts, depending on the geographical area concerned.

A world chart therefore provides the broadest perspective on maritime cartography. It does not replace a detailed navigation chart, but it helps sailors understand the overall structure of a voyage and place each sea, ocean and port within the wider network of global maritime routes.

FAQ – World Charts

What is a marine world chart?

A marine world chart represents the world on a single cartographic document, with particular emphasis on oceans, seas, continents and major maritime areas. It provides a global overview that complements detailed nautical charts.

What is a world chart used for by sailors?

It is mainly used to visualise a worldwide route, plan an ocean passage, organise a round-the-world voyage and understand major maritime routes before selecting the detailed charts required for each stage.

Can a world chart be used for navigation at sea?

A world chart does not replace a nautical chart at an appropriate navigational scale. It is intended for general planning and geographical understanding. For coastal navigation, channel navigation or harbour approaches, detailed nautical charts are required.

Which oceans are shown on a world chart?

Depending on the document, it may show the Atlantic Ocean, Pacific Ocean, Indian Ocean, Arctic Ocean and Southern Ocean, together with the principal seas associated with them.

Is a world chart useful for planning a round-the-world sailing voyage?

Yes. It makes it possible to visualise the entire route and understand the sequence of major maritime areas, such as the Atlantic, Caribbean, Panama Canal, Pacific, Polynesia, Australia, Indian Ocean, Red Sea and Mediterranean.

What is the difference between a world chart and a nautical chart?

A world chart provides a general representation of the world or a very large geographical area. A nautical chart is designed for a specific area and provides a level of detail appropriate for navigation, including soundings, hazards, aids to navigation, channels and harbour approaches.

Which publishers produce world or ocean planning charts?

SHOM and Admiralty produce world and ocean planning documents. Imray also publishes overview and planning charts for different maritime regions. Imray's current catalogue includes overview charts, ocean charts, passage charts and ocean planning charts.

Is a world chart suitable for teaching navigation?

Yes. It is a useful teaching aid for explaining oceans, seas, continents, major maritime routes, straits, canals and the general geography of long-distance voyages.

Which ports can be located on a world chart?

Depending on the level of information provided, a world chart may allow major ports such as Le Havre, Rotterdam, Lisbon, Las Palmas, Fort-de-France, New York, Miami, Panama, Papeete, Nouméa, Auckland, Sydney, Singapore, Cape Town, Durban and Marseille to be located.

Why use a world chart before selecting the charts for an ocean passage?

It makes it possible to identify the major maritime areas crossed and structure the documentation required for the voyage. The navigator can then select, for each stage, the planning, passage, coastal or approach charts corresponding to the required scale and level of detail.