Swimming through an unfamiliar body of water or going to the open sea without a reliable reference point turns into a risky venture, where the cost of error is calculated not only by lost time, but also by the safety of the crew. water-navigator It has become the standard equipment for even small pleasure boats and fishing boats, combining precise positioning, depth mapping and route building functions, becoming a digital navigator who never gets tired or loses his alertness.
Unlike automotive analogues, maritime navigation requires completely different factors, such as the lack of grid connection and constant environmental dynamics. mapplottersThey can work with vector and raster nautical maps, mapping buoys, fairways and depths in real time. Integration with the sonar allows you to see not only what is under the keel, but also to build a three-dimensional picture of the bottom, which is critical for finding fish places or safe passage over reefs.
Choosing the right equipment is always a trade-off between functionality, screen size and the budget allocated for boat upgrades. In this article, we will discuss what specifications to look for first, so that your purchase will serve as faith and truth for many years. GPS receivers The displays will help avoid common mistakes when buying.
Key criteria for choosing navigation equipment
The first thing that a consumer encounters in an electronics store is a huge range of prices and features that are easy to get confused about. The basis of any navigator is its display, and here the main parameter is not only the diagonal, but also the diagonal. resolution On a small, low-resolution screen, the map details will merge into mush, making it impossible to read information on the go, especially in bright sunlight or when pitching.
The second critical aspect is to protect the housing from aggressive aquatic environments: sea water, foam spray and direct sunlight create extreme operating conditions that quickly disable household appliances. IPX7 or IPX8 It is a mandatory requirement to ensure that the device will withstand a full immersion or a long rainstorm without loss of performance.
⚠️ Warning: Never rely on electronic navigation devices alone. Always carry paper maps of the swimming area and a compass on board, as electronics can fail at the most inopportune moment.
When choosing, you should also consider the availability of slots for memory cards and support for various card formats, such as: Navionics, C-Map or Garmin BlueChartThe ability to expand memory allows you to download detailed maps of inland water bodies or topographic maps for cruising, turning the navigator into a versatile tool.
- 🌊 Display type: The touch screen is convenient for building routes with your finger, but the button control works more reliably in gloves and with strong shaking.
- 📡 Sensitivity of the receiver: modern chips with support for satellite systems GLONASS and Galileo It provides a more stable signal in difficult weather conditions.
- 🔌 Connection interfaces: availability of ports
NMEA 0183andNMEA 2000It is required for integration with the autopilot, AIS transceiver and radar.
Functional capabilities of modern cartplotters
The modern water navigator is a powerful computer that can process giant data sets in real time. The basic function is to map the current location with high accuracy, but the potential is revealed when working with the data. route-point The device allows you to plan a path in advance, calculate the arrival time based on current speed and drift, and automatically guide the boat on a given course.
One of the most useful features for anglers and researchers is that you can record tracks of the sonar directly onto a map. You can swim through the area, see the bottom relief on the screen, and the navigator will save this road map of the depths. Next time, even with the sonar turned off, you will see on the screen where there is a pit, a dump or a sunken tree, which greatly improves the efficiency of the search.
Many mid- and high-end models support the technology Auto GuidanceIt's a system that automatically makes a safe route between two points, bypassing the straits and obstacles marked on the map, but it's worth remembering that the algorithm doesn't know about the temporarily exposed buoys or unmapped objects, so the control of the boatmaster is mandatory.
The Secret of Positioning Accuracy
To improve navigation accuracy in difficult conditions (narrow channels, rocky banks), use an external GPS antenna with a take-out on the mast or top of the superstructure, which will provide a direct view of the sky and minimize the multipath signal.
| Function | Description | Useful for fishing |
|---|---|---|
| Waypoints | Preservation of location coordinates | High (catching points) |
| TrackBack | View the history of the path on the map | Medium (return journey search) |
| Man Overboard | Instant preservation of the point of falling of a person | Critical (lifesaving) |
| Tide Data | Tide charts | High (exit planning) |
Integration with sonar and radar
The best way to do this is to connect all the instruments together, and to connect the sonar to the mapplotter, you can put a picture of the bottom and the objects you find directly on the map, and you can see not just a numerical depth, but a visual representation of what's underneath your boat, tied to geographic coordinates.
Using radar in conjunction with the navigator allows you to swim in poor visibility, fog or at night. Overlay), which allows you to see moving targets (other vessels) against a static map of the coastline, which greatly simplifies the identification of objects and decision-making on maneuvering.
The protocol is most often used to transfer data between devices. NMEA 2000It's a modern digital network, and unlike the old analog standard, it allows you to connect multiple devices to a single cable, providing two-way communication and power to devices directly from the navigation network.
☑️ Verification of instrument integration
When setting up a system, it is important to correctly allocate data sources, for example, if you have two GPS receivers connected, the navigator must know which one is the main one, and configuration errors can lead to the autopilot taking the boat wrong, or speed data will be displayed incorrectly.
Setting up and calibrating the navigation system
Once the equipment is installed, the adjustment stage is set up, on which the accuracy of the readings depends. The first step should always be to update the software (the software updates are the first step).firmware) Up to the latest version: Manufacturers regularly release patches that improve receiver performance and correct interface errors.
Then you have to configure the display of the data on the screen, and you can create your own pages with the devices you want: speed, course, depth, voltage on the onboard network. Night ModeThe color scheme is changed to red or dark to preserve the operator’s night vision.
⚠️ Warning: Before you first go to sea, be sure to calibrate the compass by circulating the vessel. Magnetic interference from the engine or metal cargo can significantly distort the course readings.
The important thing is to set up the alarms, set limits for anchorage, going to shallow water or going off course, and the sound signal will attract attention if the boat starts to blow off in the wind or current while you are resting in the cabin.
- 🛠️ Map Update: Check regularly for updates for nautical charts as the navigation environment changes.
- 🔋 Backup power: Make sure the navigator is connected to a separate battery or has protection against power surges.
- 🧹 Screen cleaning: Use only soft fabric and fresh water, avoiding aggressive chemicals that can damage the anti-reflective coating.
Maintenance and protection from the marine environment
The sea air is saturated with salt, which is the main enemy of any electronics. Even if the device has a high level of protection, salt plaque on the contacts of the connectors and the housing can lead to corrosion and oxidation. Regular flushing with fresh water after each exit is the golden rule of longevity of your equipment.
Special attention should be paid to connectors and cables. Despite the presence of rubber seals, moisture can penetrate through microcracks or temperature expansions. Using dielectric lubricant for contacts helps to create an additional barrier to moisture and prevents electrochemical corrosion.
In winter or in long-term simple navigation, it is better to dismantle and store in a dry room at room temperature. Sharp temperature changes can cause condensation inside the case, which will lead to short circuit. If you can not remove, use protective covers and silica gel inside the runduk.
To protect the screen from scratches and glare, you can use a specialized matte film for marine appliances, which not only protects the display, but also improves readability on a bright sunny day.
Prospects for the development of water navigation
Technology is moving forward, and today's navigators are getting new features that seemed like a fantasy until recently, and wireless integration allows you to stream a picture from a mapplotter to a tablet or smartphone anywhere on a boat, allowing you to control navigation while lying in a bed or steering your sails on your nose.
The introduction of augmented reality technologies (AR) It's starting to change the way we see water, and a camera mounted on a mast overlays the names of islands, buoys and navigational signs onto a video image, identifying them in real time, which is especially useful when entering an unfamiliar port or narrow fairway.
Cloud services are also evolving to share catch, weather and sea conditions with other users in real time, and social navigation is becoming a trend, bringing water-powered drivers together into a single information network where everyone can share important information about the water situation.
Investing in a quality navigator is an investment in security, and don't skimp on brand safety and reliability, because at sea, appliances can be life or death.
Do I need to buy expensive cards for inland water bodies?
For large rivers and reservoirs, free or basic maps are often enough, as the fairways are well marked there. However, for small rivers, lakes and fishing, detailed paid maps with isobats of depth can be extremely useful, but their purchase depends on the specifics of your walks.
Can a navigator work without the internet?
The GPS receiver receives the signal directly from satellites, and the maps are stored in the device’s memory, and the Internet is only needed for initial downloading of maps, software updates or using online services (weather, broadcast).
How often should I change my navigator?
The service life of quality devices is 7-10 years or more, and replacement is required either in case of physical failure or when the functionality of the device no longer meets your increased requirements (for example, the advent of radar or the need for 3D maps).