GPS navigation on Explorer Yachts and the question if it works under water

GPS, or the Global Positioning System, is an essential tool for modern navigation on land, in the air and at sea. On an explorer yacht, GPS is indispensable for planning and executing expeditions, providing accurate, real-time position information. Although GPS has its limitations in the water, some advanced technologies offer solutions to these challenges.

GPS on discovery yachts

On an explorer yacht, the GPS is essential for both general navigation and more specific tasks. It allows yacht owners and their crew to plan courses, navigate safely and monitor their current location, speed and course. In addition, the GPS helps identify potential hazards such as shoals or reefs before they can be a problem.

Most modern explorer yachts have integrated GPS systems that are coupled with other on-board systems such as radar, AIS (Automated Identification System) and ECDIS (Electronic Chart Display and Information System). Together, these systems provide a comprehensive navigation solution that ensures the yacht safely and efficiently follows its planned course.

GPS under water

GPS signals are high frequency waves that are strongly absorbed and reflected by the water surface. This means that the GPS signals can only penetrate the water to a very limited extent, usually only a few centimeters to meters. Therefore, the use of GPS under water is technically very limited and usually not practical.

However, some specialized GPS receivers can operate underwater as long as they are close enough to the surface and are waterproof. These devices receive GPS signals when they are above water and then switch to another navigation system when they are underwater. They calculate their position based on pressure and inertia and must surface periodically to get an updated fix.

Conclusion

Although GPS is essential for navigation on explorer yachts, it has its limitations when it comes to working underwater. Nevertheless, advanced devices and technologies can overcome these challenges and provide accurate position data underwater in certain conditions. However, when planning diving or underwater operations, it is important to understand the limitations of GPS and consider alternative navigation systems.