A sat nav, short for satellite navigation, is a system that uses satellite positioning and digital maps to help drivers find their way to a destination. It can show your current location, calculate a route and provide turn-by-turn directions. (Oxford Learner’s Dictionaries)
For drivers travelling through unfamiliar areas, a good sat nav can make route planning much easier. However, it should be treated as a navigation aid rather than something that replaces attention to road signs and actual road conditions.
What Is a Sat Nav?
A sat nav is an electronic navigation system commonly used in cars. It receives positioning information from satellites and combines it with digital map data to determine where the vehicle is and how to reach a chosen destination.
Some cars have sat nav built into the dashboard, while standalone units can be mounted inside a vehicle.
Modern smartphones can also provide similar navigation functions through mapping applications.
How Does a Sat Nav Work?
The system uses satellite positioning to determine the vehicle’s location. It then compares that position with digital map information and calculates a route to the destination.
Depending on the device, it can provide:
- Turn-by-turn directions
- Estimated arrival time
- Distance remaining
- Alternative routes
- Points of interest
- Voice instructions
- Traffic information
- Automatic route recalculation
Some systems can continue providing useful navigation information when a driver takes a wrong turn by recalculating the route. (Motability Scheme)
Built-In Sat Nav vs Portable Sat Nav
There are two common types of sat nav systems.
Built-In Sat Nav
This comes as part of the vehicle’s infotainment system.
It can be convenient because the screen is already integrated into the dashboard and may work with other vehicle functions.
The main consideration is keeping the map data updated and understanding what navigation features the vehicle supports.
Portable Sat Nav
A portable unit can be installed in different vehicles. This can be useful if you drive multiple cars or do not have built-in navigation.
Portable systems are also easier to remove when leaving the vehicle.
Sat Nav vs Phone Navigation
A smartphone can perform many of the same functions as a dedicated sat nav.
Your phone may be more convenient because you already have it with you and can use familiar mapping applications. However, a dedicated navigation device can offer a larger driving-focused interface and may have maps stored directly on the device.
Whichever option you use, make sure the device is securely mounted and positioned so that it does not obstruct your view.
Useful Sat Nav Features
Not every sat nav has the same features, so consider what you actually need.
Voice Directions
Voice instructions allow you to hear upcoming turns without constantly looking at the screen.
This is particularly useful when navigating unfamiliar roads.
Route Recalculation
If you miss a turn or deliberately take another road, the system can calculate another route.
Traffic Information
Some navigation systems can use live traffic information to identify congestion and suggest alternatives. The availability of these features depends on the device and its data connection. (Motorpoint)
Points of Interest
A sat nav may help you find places such as:
- Fuel stations
- Hotels
- Airports
- Restaurants
- Hospitals
- Car parks
This can be useful during longer journeys when you need to make an unplanned stop.
Offline Maps
Offline maps can be useful when travelling through areas where mobile data is unreliable.
Before a long journey, check whether your navigation system has the relevant maps downloaded or stored.
Using a Sat Nav in Nigeria
A sat nav can be particularly useful when travelling between unfamiliar areas in Nigeria.
For example, a driver travelling between Lagos, Ibadan, Ilorin or Abuja may use navigation to plan the route before setting off and identify alternative roads along the journey.
However, Nigerian road conditions can change. Construction, flooding, traffic diversions, security restrictions and damaged roads may not always be reflected immediately in digital maps.
This is why drivers should still pay attention to road signs, local instructions and visible road conditions.
Why You Should Not Follow Sat Nav Instructions Blindly
A navigation system can suggest a route, but the driver remains responsible for deciding whether that route is safe and appropriate.
A suggested road may be unsuitable because of:
- Road construction
- Flooding
- Poor road conditions
- Vehicle restrictions
- Temporary closures
- Heavy traffic
- Narrow streets
- Local access restrictions
If a road sign clearly contradicts the navigation instruction, follow the road sign and reassess the route.
Where Should You Mount a Sat Nav?
The device should be positioned where you can glance at it without taking your attention away from the road for an extended period.
Avoid placing it somewhere that blocks:
- Your view through the windscreen
- Important dashboard information
- Mirrors
- Your ability to see pedestrians or other vehicles
A secure mount is also important. You do not want the device falling while you are driving.
Keeping Your Sat Nav Updated
Road networks change, and map information can become outdated.
Depending on the device, updates may be provided through a computer, Wi-Fi connection, memory card or another update system.
Before an important trip, check whether your maps and navigation software are current.
This is especially useful if you regularly travel to new areas.
Sat Nav for Long-Distance Travel
A sat nav can be useful when preparing for an interstate journey.
Before leaving, enter your destination and review the proposed route. Check the approximate travel time, major towns along the route and places where you may want to stop.
It is also sensible to plan for situations where the device becomes unavailable.
Keep your phone charged, carry a suitable charging cable or power bank and know the general direction of your journey rather than relying entirely on the screen.
Sat Nav and Vehicle Tracking Are Not the Same
A sat nav helps a driver navigate to a destination. Vehicle tracking systems are designed for monitoring a vehicle’s location and movement.
They can sometimes use similar satellite positioning technology, but their purposes are different.
Navigation is mainly about helping you get somewhere, while tracking is generally about knowing where a vehicle is or has been.
Common Sat Nav Problems
Navigation systems can sometimes give confusing instructions or show an inaccurate position.
Possible causes include:
- Outdated maps
- Poor satellite reception
- Incorrect destination information
- Temporary road changes
- GPS signal problems
- Map data that does not reflect recent developments
If the system suddenly places you on the wrong road, slow down safely and verify your surroundings rather than making a sudden turn.
Sat Nav Maintenance
Dedicated sat nav devices require relatively little physical maintenance, but you should still take care of them.
Keep the screen clean, protect the device from excessive heat and inspect the charging cable regularly.
If the unit uses a removable mounting system, check that the mount remains secure before driving.
Do not leave expensive navigation equipment visible inside an unattended vehicle.
Choosing a Sat Nav
If you are buying a dedicated sat nav, consider:
- Screen size
- Map coverage
- Offline navigation
- Traffic information
- Voice guidance
- Route planning
- Map update options
- Mounting system
- Battery life
- Ease of use
A more expensive device is not automatically necessary. Choose one that matches the type of driving you actually do.
Using Travo.ng for Longer Journeys
A sat nav can help you navigate once you are on the road, but organising the wider journey is another part of travelling.
Travo.ng can support travel planning, transport coordination, airport transfers, hotel bookings and other logistics where required.
Whether you are travelling for business, heading to another city or arranging movement for a group, proper planning can make the journey easier before you even start the car.
Final Sat Nav Checks Before Driving
Before setting off, make sure:
- Your destination is correct
- Your route makes sense
- The device is securely mounted
- Voice guidance is working
- Your phone or sat nav is sufficiently charged
- Maps are available for your route
- You understand the general direction of the journey
A sat nav is a useful driving tool, especially when travelling somewhere unfamiliar. Used together with road signs, local information and good driving judgement, it can make navigation much simpler.
