Knowledge

Navigation

Navigation: How good route planning works

- A configuration error in the BSH GeoSeaPortal temporarily made licensed nautical chart data freely accessible; FreeNauticalChart was not at fault.
- The BSH must distribute quality-assured nautical chart products for a fee via licence holders; WMS open data services are classified as ‘not to be used for navigation’.
- Official BSH charts offer higher, traceable data reliability and frequent updates; FreeNauticalChart could establish a commercial model via licensing.

​FreeNauticalChart: The BSH gives its view – Interview with Thomas Dehling

- Increasing GNSS/GPS interference in the Baltic Sea region, particularly in the eastern Gulf of Finland, is affecting navigation and on-board systems.
- Crews should continuously check position data for plausibility and be proficient in traditional navigation using charts, a compass, bearings and a plumb line.
- Being prepared with paper nautical charts, navigational instruments, a logbook, an emergency plan and regular notes of the last known safe position increases confidence in decision-making.

GPS interference: What should you do if the chartplotter fails?

- Aqua Map displays official messages for sailors as symbols directly on the map, including buoy displacement, restricted areas and new dangers.  
- The service uses data from Denmark, France, the USA and Canada, among others; German BSH messages are not integrated and must be called up separately.  
- This function is part of the paid Advanced Tools (Expert €14.99/year, Master €24.99/year) with auto-updates and offline caching.

Navigation: Navigation app Aqua Map integrates notices to mariners - Germany is missing

- Orca integrates high-resolution weather, tide and current data as animated layers directly into the free sat nav app.
- The app shows the development of wind, rain, waves, currents and tides along planned routes for better decision-making.
- High-resolution models such as ICON-D2, ICON-EU, UK Met Office and ECMWF are available up to ten days in advance, depending on the tariff.

Navigation: Orca Navi app revises weather forecast. Model selection and animated display - even in the free version

- Oceans regulate the climate, provide habitats and shape the currents, weather, tides and therefore the safety of every sailing trip.  
- Salinity, temperature and density control currents such as the Gulf Stream or Peru Current, and influence climate, area characteristics and navigation.  
- El Niño 2026 will change storm and precipitation patterns worldwide and will be relevant for sailors when planning trips, choosing a season and taking out insurance.

World Oceans Day: Why the sea is more than just an area for sailors

Pilot project on the Trave: radio communication in English

- Aqua Map Chart Viewer is a free, web-based online nautical chart with basic functions and worldwide coverage, except Danish waters.  
- Users can call up navigational aids, depth and harbour information and display wind, wave and current data via a weather overlay with a 48-hour slider.  
- Route planning, synchronisation with the mobile app and offline use are only possible in the paid version with premium access.

Navigation: Aqua Map Chart Viewer, free online nautical charts - tall ship event as a live example

- Passage Planner extends Windy with favourable weather routing with multi-planning and uses several global weather models, but only a simple map.  
- In the practical test, the calculated routes showed implausible loops and return routes; Navimetrix was faster and provided more comprehensible routes.  
- The lack of nautical charts with depths, fairways and buoys makes a comparison with real nautical charts necessary and limits the practicality.

Navigation: Passage Planner - Weather routing plugin for Windy

- On 10 August 2025, 64 million cubic metres of debris in Tracy Arm Fjord triggered a landslide and a 481-metre-high tsunami.  
- The wave was caused by abruptly displaced water, shaved off vegetation up to 481 metres high and is the second highest run-up on record.  
- Researchers see glacier retreat due to climate change as a destabilising factor and expect similar events with potential danger for cruise ships.

Mega tsunami 2025: 481 metre high monster wave - horror scenario like in an eco-thriller

- Mobile apps enable the display and remote control of on-board instruments on smartphones and tablets via WLAN gateway or special hardware.  
- There are specialised solutions for NMEA-0183/2000, regatta sailors, cruising sailors and anglers, as well as branded apps from Garmin, Raymarine, B&G and Lowrance.  
- Price and licence models range from free basic versions and one-off payments to expensive annual subscriptions with sometimes criticised connection and synchronisation problems.

On-board instruments on the tablet: 11 apps for monitoring ship data

- Recreational boaters must use up-to-date paper charts, which can be kept up to date with the publisher's own annual correction sets.
- Updating is done with PDF or paper updates by writing in with waterproof pens and cutting out and sticking on cover sheets.
- Correction is cheaper than buying new maps and promotes map comprehension; electronic maps usually require new chips instead of correction sets.

Navigation: 2026 correction sets for DK Baltic Sea charts are available

Navigating successfully while sailing ➤ Here's how! ✅ Learning to navigate while sailing: tips, sat nav apps & more! ✅

Navigation while sailing: Learning to navigate at sea

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Navigation while sailing: Learning to navigate at sea

Navigation
How good route planning works

FreeNauticalChart
The BSH gives its view – Interview with Thomas Dehling

GPS interference
What should you do if the chartplotter fails?

Navigation
Navigation app Aqua Map integrates notices to mariners - Germany is missing

Navigation
Orca Navi app revises weather forecast. Model selection and animated display - even in the free version

World Oceans Day
Why the sea is more than just an area for sailors

Pilot project on the Trave
Radio communication in English

Navigation
Aqua Map Chart Viewer, free online nautical charts - tall ship event as a live example

Navigation
Passage Planner - Weather routing plugin for Windy

Mega tsunami 2025
481 metre high monster wave - horror scenario like in an eco-thriller

On-board instruments on the tablet
11 apps for monitoring ship data

Navigation
2026 correction sets for DK Baltic Sea charts are available

Navigation while sailing: Learning to navigate at sea

NavigationHow good route planning works

​FreeNauticalChartThe BSH gives its view – Interview with Thomas Dehling

GPS interferenceWhat should you do if the chartplotter fails?

NavigationNavigation app Aqua Map integrates notices to mariners - Germany is missing

NavigationOrca Navi app revises weather forecast. Model selection and animated display - even in the free version

World Oceans DayWhy the sea is more than just an area for sailors

Pilot project on the TraveRadio communication in English

NavigationAqua Map Chart Viewer, free online nautical charts - tall ship event as a live example

NavigationPassage Planner - Weather routing plugin for Windy

Mega tsunami 2025481 metre high monster wave - horror scenario like in an eco-thriller

On-board instruments on the tablet11 apps for monitoring ship data

Navigation2026 correction sets for DK Baltic Sea charts are available

Navigation
How good route planning works

FreeNauticalChart
The BSH gives its view – Interview with Thomas Dehling

GPS interference
What should you do if the chartplotter fails?

Navigation
Navigation app Aqua Map integrates notices to mariners - Germany is missing

Navigation
Orca Navi app revises weather forecast. Model selection and animated display - even in the free version

World Oceans Day
Why the sea is more than just an area for sailors

Pilot project on the Trave
Radio communication in English

Navigation
Aqua Map Chart Viewer, free online nautical charts - tall ship event as a live example

Navigation
Passage Planner - Weather routing plugin for Windy

Mega tsunami 2025
481 metre high monster wave - horror scenario like in an eco-thriller

On-board instruments on the tablet
11 apps for monitoring ship data

Navigation
2026 correction sets for DK Baltic Sea charts are available