A satellite navigation (satnav) system offers a number of benefits for travellers, especially those on the road. Here are some of the key advantages:

1. Route Planning and Guidance: The primary benefit of a satnav system is to provide accurate, turn-by-turn directions from your current location to your desired destination. This eliminates the need for physical maps and reduces the likelihood of getting lost.

2. Real-time Traffic Updates: Modern satnav systems often include real-time traffic updates, which can help you avoid congestion and other traffic problems. This can save a significant amount of time on longer journeys.

3. Estimated Time of Arrival: Satnav systems calculate the estimated time of arrival (ETA) based on current traffic conditions and the distance remaining. This can help in planning your schedule more effectively.

4. Points of Interest: Satnav systems can identify points of interest such as gas stations, restaurants, hotels, and tourist attractions. This can be particularly useful when you're in an unfamiliar area.

5. Safety: Some satnav systems can alert drivers to upcoming hazards, like sharp turns, speed cameras, or accident-prone areas.

6. Alternative Routes: If the primary route is blocked for some reason, a satnav can provide alternative routes to reach the destination.

7. Voice Commands: Most modern satnav systems offer voice command features, allowing drivers to interact with the system without taking their hands off the wheel, which enhances safety.

8. Offline Maps: Some satnav systems allow you to download maps for offline use, which can be incredibly useful in areas with poor or no internet connection.

9. Lane Guidance: In complex interchanges or multi-lane roads, satnav systems can provide lane guidance to help drivers position themselves correctly well ahead of time.

All of these features make a satnav system an invaluable tool for drivers, particularly for those travelling in unfamiliar areas or over long distances.