SnMap Digital Marine Chart for ScanNav Software

Introduction

Are you looking for a SnMap digital marine chart compatible with ScanNav software to prepare a navigation, plan a route or analyse a maritime area on a computer? Digital marine charts used with ScanNav provide a cartographic environment suitable for coastal, offshore and ocean navigation planning, depending on the available geographical coverage.

A digital chart for ScanNav can display essential nautical information such as depths, soundings, depth contours, coastlines, navigation marks, lights, hazards, wrecks, channels, ports and anchorages. It provides an important support for preparing a route before departure and analysing the different areas encountered during a voyage.

Choosing a SnMap digital marine chart for ScanNav mainly depends on the navigation area, the required geographical coverage, the level of detail needed, the data format and compatibility with the version of the software being used.

What is a SnMap digital marine chart?

A SnMap digital marine chart is digital chart data intended for use in a compatible navigation environment. It allows a maritime area to be displayed on a computer and provides access to different types of information useful for route planning.

Unlike a paper nautical chart, digital cartography can be displayed at different zoom levels, allowing the navigator to quickly examine a large geographical area or, conversely, focus on a specific sector.

Depending on the available data and geographical coverage, a digital marine chart may display:

• depths and soundings;

• depth contours;

• coastlines and islands;

• ports and harbour facilities;

• channels and navigable waterways;

• buoys and other navigation marks;

• lights and lighthouses;

• wrecks;

• navigation hazards;

• regulated or restricted areas;

• anchorages and other nautical information.

The exact content depends on the source of the chart data, the geographical area covered and the format used.

What is a SnMap chart used for with ScanNav?

ScanNav is navigation and charting software that allows users to work with compatible digital chart data on a computer.

A SnMap digital marine chart suitable for ScanNav provides the cartographic support required to analyse a navigation area and prepare a route.

Before going to sea, the navigator can, for example, examine:

• the departure area and its approaches;

• harbour entrances and channels;

• shallow-water areas;

• isolated hazards;

• anchorages;

• passages between islands;

• different possible routes;

• ports that could be used as stopovers.

Digital cartography is therefore particularly useful during the voyage-planning phase. It makes it possible to work across a large geographical area and quickly switch from an overview to a more detailed analysis.

Which SnMap digital marine chart should you choose for ScanNav?

The first criterion to consider is the area in which you intend to navigate.

A chart covering Brittany will not necessarily meet the requirements of a navigator planning a Mediterranean crossing or navigation in the Caribbean.

It is therefore important to start by determining precisely:

• the departure port;

• the destination or navigation area;

• the planned route;

• the coastal areas along the route;

• possible stopovers;

• alternative routes;

• possible diversion areas.

For long-distance navigation, several chart areas may be required to avoid gaps in coverage.

Check compatibility with ScanNav

Compatibility between the chart data and the software is essential.

Not all digital marine charts are interchangeable. The data format must be compatible with ScanNav and with the computer configuration being used.

Before selecting SnMap chart data, it is therefore advisable to check:

• the exact data format;

• the version of ScanNav being used;

• the geographical coverage;

• the available level of detail;

• any specific technical requirements.

SnMap digital marine chart for coastal navigation

Coastal navigation generally requires detailed cartographic information.

Close to shore, the navigator encounters numerous features that must be accurately identified: shoals, rocks, channels, buoys, lights, ports, islands, regulated areas and narrow passages.

A SnMap digital marine chart compatible with ScanNav can be used to study these different elements before creating a route.

For example, when preparing a coastal route along Brittany, the navigator may need to analyse several passages between islands, identify the main channels, examine shallow-water areas and locate available ports or anchorages.

The same principle applies to the Mediterranean, the English Channel, the Atlantic coast or any other area covered by the available chart data.

SnMap chart for offshore and ocean navigation

Offshore and ocean navigation involve different requirements.

The navigator needs sufficiently broad geographical coverage to analyse a route over tens, hundreds or thousands of nautical miles.

A SnMap digital marine chart can therefore be used to prepare:

• offshore passages;

• ocean crossings;

• transatlantic crossings;

• long-distance cruising;

• voyages between several countries;

• round-the-world sailing.

For these types of navigation, it is particularly important to verify that the available chart areas cover the entire route.

A transatlantic crossing, for example, may require chart coverage that allows the navigator to work with the departure and arrival areas as well as the entire ocean passage.

Planning a route with ScanNav

One of the main advantages of digital cartography is the ability to prepare a route before departure.

With ScanNav and compatible chart data, the navigator can progressively analyse the intended route.

A typical planning process may include the following steps:

1. define the departure point and destination;

2. identify the relevant maritime area;

3. check the available chart coverage;

4. analyse depths and soundings;

5. identify hazards and sensitive areas;

6. locate channels and navigation aids;

7. study ports and anchorages;

8. define a primary route;

9. prepare alternative routes;

10. check the overall consistency of the passage.

This approach is particularly useful for complex navigation or long-distance voyages.

Digital marine charts and depth information

Bathymetric information is an essential component of marine cartography.

Soundings and depth contours help the navigator understand the configuration of the seabed and assess possible navigation areas.

When preparing a coastal route, the navigator may need to identify:

• areas with sufficient depth;

• shoals;

• rapid changes in depth;

• channels;

• harbour approaches;

• passages between land masses.

However, it is important to remember that chart data does not replace the navigator's observation and vigilance. Actual conditions may differ from charted information, depending on the date of the surveys, changes in seabed conditions, weather and sea conditions.

SnMap raster or vector chart: what is the difference?

The distinction between raster and vector cartography is important in digital navigation.

A raster chart is essentially a digital representation of a chart. It preserves the general appearance of the source chart and can be displayed electronically.

A vector chart consists of structured geographical objects. Information such as soundings, coastlines, hazards and navigation aids can be stored as individual data objects.

The two approaches have different characteristics in terms of display, zooming, data management and available functionality.

However, the choice should not be based solely on whether the chart is raster or vector. Actual compatibility with ScanNav, the data format and geographical coverage remain essential considerations.

Why is chart coverage important?

A common mistake is to select a chart based on a single destination when the planned voyage actually covers a much larger area.

For coastal cruising, several charts may be required if the route extends over a significant distance.

For an ocean crossing, chart coverage should be considered in terms of the entire voyage.

Before planning a route, it is therefore advisable to identify:

• the main navigation area;

• the departure and arrival areas;

• stopovers;

• possible diversion routes;

• ports of refuge;

• the different chart areas required.

This approach helps prevent gaps in coverage during voyage planning.

Updating digital marine charts

Digital chart data can change over time.

Modifications may affect ports, channels, navigation aids, regulated areas or other hydrographic information.

Keeping chart data current is therefore an important part of navigation preparation.

Before departure, it is advisable to check:

• the date or status of the available data;

• whether updates are available;

• the actual geographical coverage;

• compatibility with the version of ScanNav being used;

• whether the data is suitable for the planned route.

For professional navigation, requirements may also depend on the vessel's procedures and applicable regulations.

What type of navigation can SnMap charts be used for?

A SnMap digital marine chart compatible with ScanNav can meet different requirements depending on the available coverage.

Recreational boating

Digital cartography can be used to prepare a sailing or motorboat trip, a coastal cruise or a longer itinerary.

Coastal navigation

It can be used to study ports, channels, anchorages, hazards, shoals and navigation aids.

Offshore navigation

The priority becomes geographical coverage and the ability to plan routes over long distances.

Transatlantic crossing

Sufficient coverage should allow the navigator to work with the entire crossing, from the departure area to the approach to the destination.

Offshore operations

Digital cartography can be used to analyse areas far from the coast and prepare routes for professional or recreational navigation.

How to prepare a long voyage with SnMap and ScanNav

For a long-distance voyage, it is preferable to consider the entire route rather than selecting individual charts one by one.

Start by defining the overall itinerary and then identify the different geographical areas along the route.

A complete preparation may include:

• chart coverage for the departure port;

• the initial coastal areas;

• offshore sectors;

• ocean areas;

• approaches to destination ports;

• planned stopovers;

• ports of refuge;

• alternative routes.

This approach makes it possible to check that the chart coverage is consistent with the navigation programme.

Key criteria to remember

When choosing a SnMap digital marine chart for ScanNav, the essential criteria are:

• compatibility with ScanNav;

• data format;

• geographical coverage;

• level of detail;

• type of nautical information available;

• currency of the data;

• complete coverage of the planned route;

• any additional chart areas that may be required.

The chart selection should always be based on the actual navigation programme and the computer equipment being used.

Conclusion

A SnMap digital marine chart compatible with ScanNav provides a navigation-planning tool for analysing a maritime area, studying depths and hazards and creating a route on a computer.

When choosing suitable chart data, the main criteria are compatibility with ScanNav, data format, geographical coverage, level of detail and the currency of the nautical information.

For coastal navigation, particular attention should be paid to ports, channels, anchorages, shoals and navigation aids. For offshore, ocean or transoceanic navigation, geographical coverage becomes a key consideration.

Chart preparation should ultimately be considered as one part of overall voyage planning. It does not replace lookout duties, the required nautical documents, the navigator's judgement or the assessment of conditions encountered at sea.

Frequently Asked Questions – SnMap Digital Marine Charts for ScanNav

What is a SnMap digital marine chart?

A SnMap digital marine chart is digital chart data intended for use in a compatible navigation environment. It allows nautical information to be displayed and analysed on a computer.

Is a SnMap chart compatible with ScanNav?

Compatibility depends on the exact SnMap data format and the configuration or version of ScanNav being used. It is therefore important to check the technical specifications before use.

What does a SnMap digital marine chart contain?

Depending on the area and data source, it may contain depths, soundings, depth contours, coastlines, ports, channels, navigation marks, lights, wrecks, hazards, anchorages and regulated areas.

Can a SnMap chart be used for coastal navigation?

Yes, when the coverage and level of detail are suitable for the area concerned. Digital cartography can be used to prepare harbour approaches, coastal passages and anchorage planning.

Can a SnMap chart be used for offshore navigation?

Yes, provided that the data covers the relevant offshore area and is compatible with ScanNav.

Can a SnMap chart be used for a transatlantic crossing?

This depends on the available geographical coverage. A transatlantic crossing requires chart coverage covering the entire passage, including the departure and arrival areas.

Which digital marine chart should I choose for ScanNav?

The choice mainly depends on the navigation area, required coverage, data format, required level of detail and compatibility with ScanNav.

Is a SnMap chart a raster or vector chart?

The term SnMap alone does not determine the exact type of data. The format and technical specifications of the chart data used with ScanNav should be checked.

What is the difference between raster and vector marine charts?

A raster chart is a digital representation of a chart, whereas a vector chart consists of structured geographical objects. Their operation and functionality depend on the navigation software being used.

Do digital marine charts need to be updated?

Yes. Current chart data is important because nautical information can change. The availability of updates should be checked before navigation.

Can ScanNav be used to prepare an offshore voyage?

ScanNav can be used to prepare and analyse a route when compatible chart data covering the intended navigation area is available.

What chart coverage is needed for a long-distance passage?

For a long-distance passage, sufficiently broad geographical coverage is required to cover the entire route, potentially using several complementary chart areas or datasets.

Is a SnMap chart suitable for professional navigation?

Digital chart data can be used in a professional context when its source, format, coverage, currency and compatibility meet the requirements of the operation and navigation system.

Why use a digital marine chart with ScanNav?

Compatible digital cartography provides ScanNav with the geographical information required to analyse a maritime area, study available nautical information and plan a route.

How do I choose a SnMap chart for ScanNav?

First identify the exact navigation area and planned route. Then check geographical coverage, data format, compatibility with ScanNav, level of detail and the currency of the chart data.