Modern navigation on the water has ceased to be the lot of professional yachtsmen and has become a mandatory attribute of safety and comfort for any boat owner. The decision to buy a navigator for a boat today is made not only by the captain of an ocean liner, but also by the owner of a small PVC boat going fishing on weekends. The electronics market offers hundreds of models, and it is almost impossible to understand them immediately without deep dive into the specifications.
The device performs several critical functions: it shows precise location, allows you to plot routes, serves as a map of depths and is often combined with a sonar. Mistakes in choosing can cost not only money, but also the safety of the crew, especially in poor visibility or in an unfamiliar body of water. Therefore, the process of selecting equipment must be approached systematically, taking into account the type of vessel and its use scenarios.
In this article, we’ll take a closer look at the key options to make sure your purchase is an investment in peace of mind, not a disappointment. We’ll discuss screen types, mapping, receiver sensitivity, and editing nuances that beginners often overlook.
Key parameters of choosing a GPS-cardplotter
The first thing that the buyer faces is a huge range of prices and specifications. GPS mapplotter It's a complex electronic device, and its hardware has a direct impact on the quality of work, and the basis of any navigation is a satellite receiver. Modern models support work not only with the American GPS system, but also with the Russian GLONASS, European Galileo and China's BeiDou.
The number of channels that receive the signal determines how quickly the device will “catch” satellites after turning on and how stable it will work in difficult conditions, for example, under a dense canopy of trees or in narrow straits with high banks. Also important is the frequency of updating coordinates, which in quality models reaches 10 Hz and above, ensuring smooth movement of the cursor on the map.
The built-in memory and memory card support deserve special attention. Navigation maps take up a lot of space, and the ability to quickly update them or download detailed maps of fishing grounds is a great way to do this. must-have Some manufacturers use proprietary card formats, which restricts user choice to products of one brand.
- 🛰️ Multisystem: Support for at least two satellite systems (GPS + GLONASS) for confident reception.
- 🗺️ Type of cartography: Pre-installed maps or the ability to download them (Navionics, C-Map, OziExplorer).
- 💾 Memory capacity: Support for microSD cards up to 32 GB and above for raster card storage.
⚠️ Attention: Cheap Chinese navigators without a brand often claim support for many systems, but in practice have low antenna sensitivity and can lose signal when cloudy.
Before buying, check whether the device supports.kmz cards or manufacturers’ own formats, as conversions can be paid or complicated.
Screen and interface: readability in the sun
Visual contact with the navigator on the water takes place in extreme conditions: bright sun, water glare, rain and splashes, so the quality of the screen comes to the fore. Resolution of the matrix And its brightness (measured in the nits) determines whether you see the card clearly or have to cover the display from the sun with your visor, and for daytime use, the minimum comfortable brightness is 800-1000 nits.
Screen size is the second important parameter. For a small PVC boat, 5-7 inches is enough, but if you plan to look at the map from a meter or more, it's better to look at 9-12 inches. However, large screens consume more power and require more space to install. Touch control is convenient, but with wet gloves or wet fingers, resistive or capacitive screens can work incorrectly, so having physical buttons is a big plus.
Viewing angle also plays a role, especially if the navigator is not installed directly in front of the operator's eyes, but slightly to the side. IPS-matrixes provide better color reproduction and wide viewing angles compared to TN panels, which can "fad" when viewed from the side.
The interface of the device should be intuitive. Garmin, Lowrance and Raymarine They use different logical menu chains. Before buying, it is advisable to watch video reviews of the interface of a particular model to see if you will be comfortable switching between the card, sonar and sonar on the go.
Integration with sonar and sonar
Often, you buy a navigator in conjunction with a sonar, and that's the right solution. Combined devices (cardplotter sonar) take up less space and have a single control interface. But there are many technical nuances. First of all, it's the frequency and power of the emitter. For rivers and shallow depths, there are enough standard frequencies, and for seas and deep depths you need powerful emitters.
Modern scanning technologies, such as DownVision (down scan) and SideVision And this is not just arcs on the screen, but a detailed view of the underwater world, and the fact that the navigation system supports this technology greatly enhances the functionality of the navigation system for fishermen.
It is important to consider the type of sensor connection. Some models require the purchase of a separate transducer, others come with a bundle, and you should also pay attention to support for NMEA 2000 or NMEA 0183 protocols if you plan to connect the navigator to other devices on board, such as autopilot or AIS translator.
What is the difference between 2D and 3D sounder?
The 2D sonar shows a slice of water under the boat in real time. The 3D sonar (or sonar with relief building function) accumulates data and creates a three-dimensional model of the bottom, which is useful for studying the structure of driftwoods and brows, but requires the boat to move.
- 🐟 Frequency: Standard 50/200 kHz or high-frequency CHIRPs for better detail.
- 📡 Power: 200 watts to 1000 watts and higher (RMS) affect depth and speed.
- 🔌 Interfaces: port for connecting additional equipment.
Protection from water and climatic conditions
Marine and river electronics must be ready for the harshest of tests. IP67 or IPX7This means that the device will withstand full immersion in water for a certain time (usually up to 1 meter for 30 minutes) and is protected from dust. However, even with high protection, it is important to properly install the device so that water does not leak into the cable connectors.
The materials of the case also matter. The plastic must be resistant to ultraviolet light, otherwise in a couple of seasons it can turn yellow or become brittle. The buttons and connectors must have reliable rubber plugs that do not lose elasticity in the cold.
Not all navigators work equally well in the cold. Liquid crystals in the screen can freeze, response time increases, and lithium batteries (if the device is autonomous) lose charge quickly. For winter fishing or northern latitudes, you need to choose models with an extended temperature range.
⚠️ Attention: Even a waterproof enclosure won't save the device if the condensate gets in through the cable connectors at a sharp temperature drop. Always use dielectric lubricant for contacts.
The IP67 protection class is the minimum standard required for fixed installation on an open cockpit boat.
Comparison of popular models of navigators
To make it easier to choose, we have compiled a comparative table of popular devices on the market, and these models have proven to be reliable assistants for boaters at various levels.
| Model | Screen diagonal | Support for maps | echoer | Features |
|---|---|---|---|---|
| Garmin GPSMAP 64 | 6 inches | Garmin, OpenStreetMap | Optionally. | High autonomy, buttons |
| Lowrance Hook2-7 | 7 inches | C-Map, Navionics | Built-in (CHIRP) | Simplicity, auto-tuning sonar |
| Raymarine Element 9 | 9 inches | LightHouse Charts | Built-in (HV/WV) | High resolution, Wi-Fi |
| Navitel MS700 | 7 inches | Navitel | No (GPS only) | Budgetary support, GLONASS support |
When you choose between brands, you have to consider the ecosystem. GarminIt's logical to use a navigator of the same brand to synchronize data. Lowrance or Humminbird They will be out of competition because of their sonar.
Budget models often win in price, but they can lose in speed when moving at high speed. For fast boats, this is critical: the map must keep pace with the boat, otherwise navigation loses meaning.
Installation and initial setup
The right installation is the key to long-term service of the device. The installation site must be protected from direct waves, but it also provides a good view. The bracket must be rigid, without backlashes, because the vibration on the water is very high. The cables should be laid away from sources of interference, such as motor power wires or radio antennas.
To connect the power, be sure to use a safety lock in the break of the plus wire, located as close to the battery as possible, this will protect the wiring from fire in the event of a short circuit.
☑️ Checklist before first launch
The primary setting includes language, time zone and coordinate format. degrees, minutes, seconds or degrees, minutes. Minutes.It is important to align the format of the navigator with the format in which you plan to download the waypoints from friends or from the Internet.
Calibration of the compass (if it is in the device) should be carried out in the open, away from metal objects and working electronics. The procedure is usually described in the instructions and takes a couple of minutes, but it is critical for correct mapping of the course.
⚠️ Attention: Never run a power cable through the engine compartment without additional corrugated protection – gasoline and oil vapors can break the insulation of a regular wire in one season.
Frequently Asked Questions (FAQ)
Do I need to buy paid cards if there are free ones?
Free maps (such as OziExplorer or OpenSeaMap) often have good coastline detail, but may lack depths, navigation signs, and underwater obstacle information. For serious navigation and safety, paid maps (Navionics, C-Map) are preferred as they are regularly updated and checked.
Can I use a smartphone instead of a navigator?
It is possible, but with limitations. The smartphone is not a specialized marine device: it is afraid of water, the sun (the screen fades), has a weak GPS antenna and quickly discharges. Use the phone only as a backup option or in conjunction with an external GPS receiver in a protected tablet.
How often do I need to update the maps?
The bottom terrain is rarely changed, but the navigation environment (buoys, signs, fairways) can change annually, it is recommended to update the maps at least once a season, before navigation begins.
What to do if the navigator catches satellites for a long time?
This may be due to a discharged internal battery (if any) stored by the satellite almanac, let the device lie in the sun or connect to power in the open for 15-20 minutes, and check whether the signal is shielded by a metal visor or the proximity of the radio antenna.