Almanach du Marin Breton: Reference Guide for Coastal Navigation in the English Channel and Atlantic

The Almanach du Marin Breton is a historic reference in French nautical documentation. Designed to assist sailors in preparing and conducting their voyages, it brings together practical, technical, regulatory and safety information essential for coastal navigation and cruising.

Particularly well suited to navigation along the English Channel, Brittany and the Atlantic coast, the Almanach du Marin Breton covers a large area from Dunkirk to Hendaye, with information also relating to the southern coast of England. It is particularly valuable when navigating in areas subject to significant tidal ranges and strong tidal currents.

Published annually, the Almanach du Marin Breton brings together tide tables, current charts, port and harbour information, approaches, lighthouses and lights, buoyage, weather information, navigation rules, safety procedures and key regulatory texts.

What is the Almanach du Marin Breton used for?

A nautical chart allows the navigator to determine the vessel's position, plot a route and identify depths, hazards, channels, shoals, buoys and other cartographic information required for navigation.

The Almanach du Marin Breton provides complementary information. It helps sailors understand how to navigate in a particular area, how to prepare a harbour approach, when to pass through a current-affected area and what practical information to consult during a stopover.

It can be used to:

• prepare coastal navigation;

• calculate passage times according to the tides;

• anticipate tidal currents;

• prepare harbour entrances and departures;

• identify ports and their characteristics;

• consult information about anchorages;

• prepare a stopover;

• find useful VHF frequencies;

• access maritime weather information;

• consult navigation and buoyage rules;

• prepare both daytime and nighttime navigation;

• keep practical nautical documentation readily available on board.

The Almanach du Marin Breton is therefore both a coastal navigation guide, a maritime directory, a safety reference and a practical source of information for planning stopovers.

Extensive coverage of the French western coastline

One of the main advantages of the Almanach du Marin Breton is its geographical coverage.

The area extends from Dunkirk to Hendaye, encompassing most of the French coastline along the English Channel and Atlantic. It therefore includes:

• the North Sea;

• the English Channel;

• Northern Brittany;

• Southern Brittany;

• the Bay of Biscay;

• the French Atlantic coast;

• the Basque coastline.

This coverage is particularly useful for sailors undertaking cruises between several French regions and wishing to use consistent documentation on board.

Navigation in the English Channel: Tides and Currents

The English Channel is an area where tidal phenomena play a major role.

Between Dunkirk, Dieppe, Le Havre, Cherbourg, Granville and Saint-Malo, sailors need to incorporate tide times and currents into their route planning.

The Almanach du Marin Breton provides data that help anticipate these phenomena and prepare difficult passages more effectively.

For example, a voyage between Cherbourg and Saint-Malo cannot be planned solely according to the distance between the two ports. The navigator must also consider wind, tide, currents, maritime traffic and the characteristics of the approaches.

The almanac therefore provides practical information that complements nautical charts.

Northern Brittany: Preparing Challenging Passages

Northern Brittany is one of the areas where the Almanach du Marin Breton is particularly useful.

Ports such as Saint-Malo, Saint-Brieuc, Paimpol, Tréguier, Lannion and Roscoff are located in a maritime environment characterized by numerous islands, rocks, channels and areas affected by strong currents.

Approaching some ports requires a good understanding of water levels and tidal conditions.

For a cruise in Northern Brittany, the almanac helps sailors prepare successive stopovers and anticipate passage times in the most sensitive areas.

Southern Brittany: Raz de Sein, Iroise Sea and Coastal Passages

Southern Brittany and the Iroise Sea also present specific navigation conditions.

Areas such as the Raz de Sein, Fromveur Passage and the waters around Ouessant are known for their currents and require careful preparation.

The Almanach du Marin Breton provides current information that allows sailors to incorporate these phenomena into their route calculations.

Ports such as Brest, Douarnenez, Audierne, Concarneau, Lorient, Port-Louis, Belle-Île, Quiberon and Le Croisic can therefore form part of a voyage prepared using this documentation.

For a cruise in Brittany, combining the nautical chart, tide data and port information provides an essential basis for voyage preparation.

From Brittany to the Atlantic

Beyond Brittany, the Almanach du Marin Breton also supports navigation along the French Atlantic coast.

Sailors can plan stopovers towards La Rochelle, Royan, Rochefort, Arcachon, Bayonne and Saint-Jean-de-Luz, potentially continuing towards the Spanish border and the Bay of Biscay.

The Bay of Biscay also requires appropriate preparation. Weather, swell, prevailing winds, maritime traffic and distances between ports can significantly affect navigation conditions.

The almanac mainly provides the practical and regulatory information required for coastal navigation and stopovers.

Ports: Essential Information on Board

The Almanach du Marin Breton includes a detailed directory of numerous ports. The information provided helps sailors prepare their arrival and organize their stopovers.

The documentation includes information such as:

• port coordinates;

• useful contacts;

• available services;

• berthing facilities;

• characteristics of harbour installations;

• access conditions;

• anchorages;

• visitor pontoons;

• practical information required for the stopover.

Knowing the harbour before arrival is an important part of navigation safety, particularly when the crew is unfamiliar with the area.

The Almanach du Marin Breton therefore lists approximately 340 ports throughout its coverage area.

Lighthouses, Lights and Landfalls

Coastal navigation is not limited to position and depth information.

During a landfall or nighttime navigation, identifying lighthouses, lights, marks and landmarks is an important part of navigation.

The Almanach du Marin Breton provides information about navigational lighthouses and lights, including their positions and characteristics.

This information complements the nautical chart and improves the navigator's understanding of the coastal environment.

It is particularly useful for nighttime approaches or when visibility is reduced.

Marine Weather and Voyage Preparation

Weather is another important aspect of navigation planning.

A voyage between Brest and Lorient, for example, is not prepared in the same way as a passage across the Bay of Biscay. Wind, swell, visibility and changing weather conditions can influence the choice of route or stopover.

The Almanach du Marin Breton provides information enabling sailors to identify the various sources of marine weather forecasts and useful contacts.

It therefore complements the weather information routinely used on board.

Maritime Regulations, Buoyage and Safety

The publication also contains an important section devoted to maritime regulations and safety.

Sailors can find information concerning:

• steering and sailing rules;

• maritime signals;

• marks and signals;

• maritime buoyage;

• vessel lights;

• the International Code of Signals;

• safety procedures;

• rescue information;

• maritime communications.

These elements are particularly useful for sailors who want a reference document that is readily accessible on board.

VHF Frequencies and Rescue Services

Communication is an integral part of maritime safety.

The Almanach du Marin Breton provides information about VHF frequencies used by ports and rescue centres, making it easier for sailors to identify the appropriate contact depending on the situation.

This information can be particularly useful when entering a harbour, requesting assistance or dealing with a situation requiring communication with maritime services.

Knowing this information in advance avoids having to search for it during an emergency.

A Reference for Leisure and Professional Sailors

The Almanach du Marin Breton is intended for a broad audience.

It can be used by:

• beginner sailors;

• sailing yacht owners;

• motorboat sailors;

• cruising skippers;

• cruise crews;

• sailing schools;

• professional coastal operators;

• sailors preparing cruises lasting several weeks.

For beginners, it provides educational support for understanding tides, buoyage, navigation rules and the organization of a stopover.

For experienced sailors, it becomes primarily a voyage-planning and quick-reference tool.

The Importance of the Annual Edition

The Almanach du Marin Breton is an annual publication. This is important because nautical and regulatory information needs to remain current.

Information relating to ports, contacts, services, regulations and certain navigation details may change.

It is therefore preferable to consult the edition corresponding to the year of navigation.

Up-to-date nautical documentation also helps avoid planning a route or stopover using information that has become obsolete.

Almanach du Marin Breton and Nautical Charts

The Almanach du Marin Breton does not replace a nautical chart.

The two documents have different but complementary functions.

The nautical chart is used to:

• determine the vessel's position;

• plot a route;

• identify depths;

• identify hazards;

• follow channels;

• interpret buoyage.

The Almanach du Marin Breton provides additional information about tides, currents, ports, lights, regulations, communications and stopovers.

For navigation in the English Channel and Atlantic, it can be used with charts from Shom, Admiralty, NV Charts or other hydrographic services, depending on the cruising area.

Documentation Particularly Suited to French Coastal Navigation

The strength of the Almanach du Marin Breton lies in its adaptation to the French coastline of the English Channel and Atlantic.

It can accompany both a day sail and a cruise involving multiple ports.

An itinerary such as Saint-Malo – Brest – Concarneau – Lorient – Belle-Île – La Rochelle can be prepared using information about ports, tides, currents and regulations.

Likewise, a voyage from Cherbourg – Granville – Saint-Malo, or a southbound cruise towards Arcachon and the Basque Country, requires a combination of charts, weather information and practical nautical data.

The almanac therefore has a natural place in the ship's nautical library.

Conclusion

The Almanach du Marin Breton is a major reference in French nautical documentation for navigation along the English Channel and Atlantic coasts.

Its coverage from Dunkirk to Hendaye, information on approximately 340 ports, tide tables, current data, harbour information, weather information, lighthouse and light data, as well as regulatory and safety information, make it a particularly comprehensive reference.

It is particularly well suited to areas where tides and currents play a major role, including Normandy, Northern Brittany, Southern Brittany, the Iroise Sea and the Bay of Biscay.

Used together with suitable nautical charts, it helps sailors prepare routes, challenging passages and stopovers more accurately, while keeping an immediately accessible reference document on board.

FAQ – Almanach du Marin Breton

What does the Almanach du Marin Breton contain?

It includes tide tables, current information, port and harbour information, approaches, lighthouses and lights, marine weather information, buoyage, navigation rules, safety information and VHF communications.

What area does the Almanach du Marin Breton cover?

The main edition covers the French coastline from Dunkirk to Hendaye, with additional information relating to the southern coast of England.

Is the Almanach du Marin Breton suitable for sailing in Brittany?

Yes. It is particularly well suited to navigation in Northern Brittany, Southern Brittany and the Iroise Sea, including preparation of tides, currents, ports and challenging passages.

Is the Almanach du Marin Breton useful in Normandy?

Yes. It covers navigation between Dunkirk, Dieppe, Le Havre, Cherbourg, Granville and Saint-Malo, providing useful information about ports, tides and approaches.

Does the Almanach du Marin Breton provide tide times?

Yes. Tide tables are one of the publication's important components and allow sailors to prepare navigation that depends on water levels.

Does it also provide information about currents?

Yes. The publication includes current data and charts that are particularly useful in areas where tidal currents are significant.

Is the Almanach du Marin Breton useful for navigating the Raz de Sein?

Yes. The Raz de Sein is one of the passages where careful preparation of tides and currents is particularly important. The almanac provides information useful for this preparation, in combination with the nautical chart and other navigation references.

Does the Almanach du Marin Breton contain port information?

Yes. The publication lists approximately 340 ports and provides information such as coordinates, contacts, services, berthing facilities and other data useful for preparing stopovers.

Does the Almanach du Marin Breton replace a nautical chart?

No. It complements the nautical chart. The chart is used to plot the route and identify depths and hazards, while the almanac provides extensive practical, harbour and regulatory information.

Which nautical charts can be used with the Almanach du Marin Breton?

Depending on the cruising area, it can be used with charts from Shom, Admiralty, NV Charts or other national hydrographic services.

Is the Almanach du Marin Breton suitable for nighttime navigation?

Yes. Information about lighthouses, lights and maritime signals is particularly useful when preparing approaches and nighttime navigation.

Does the Almanach du Marin Breton contain VHF frequencies?

Yes. It provides information about VHF frequencies used by ports and rescue centres.

Should a new edition be used every year?

As the Almanach du Marin Breton is an annual publication, using the edition corresponding to the year of navigation is recommended in order to have the latest information concerning tides, ports, contacts and regulations.

Is the Almanach du Marin Breton suitable for beginners?

Yes. It is also an educational reference for understanding tides, currents, buoyage, navigation rules, ports and safety procedures.

Is the Almanach du Marin Breton suitable for a cruise lasting several weeks?

Yes. Its extensive geographical coverage makes it possible to prepare itineraries involving numerous stopovers, particularly between the English Channel, Brittany and the French Atlantic coast.