Marine radar selector.
Look beyond the range.

Describe The Job Before Comparing Radar Hardware

Start with the situations where radar will earn its place on the boat. A cruiser entering a busy inlet after dark needs a clear picture of nearby traffic and shoreline. An offshore operator may spend more time comparing distant returns while maintaining a useful short range view. An angler interested in bird activity has another operating priority, with no guarantee that every bird group will produce a useful return.

Select the mission that best describes regular use rather than an occasional ideal trip. Add the constraints you already know, such as an existing compatible display or a compact mounting surface. The selector uses those choices to explain a suitable category and the next checks. It should help you ask more precise questions about the installation instead of simply ranking products by their largest published range number.

Understand What Dome And Open Array Change

A radome encloses the rotating antenna inside a protective housing. Its compact footprint makes it a practical category to investigate when mounting space and weight are limited. An open array uses an exposed rotating antenna. A longer antenna can provide a narrower horizontal beam, which helps separate targets that are close together in bearing. The exact capability depends on the radar design and operating conditions.

The choice is not determined by boat length alone. A larger vessel may have a compact installation constraint, while a smaller offshore boat may have a suitable structure for a more demanding system. Compare antenna dimensions, weight, service access, power requirements, and the information you need to distinguish. Manufacturer descriptions from Raymarine explain the category differences, but the final choice still requires the exact model specifications and a review of your boat.

Use The Horizon View To Challenge Range Assumptions

The horizon illustration makes scanner height and target height visible. A low floating object and a tall ship do not present the same line of sight. Increasing the scanner height can extend a theoretical horizon, but it also changes the installation arrangement. A display capable of selecting a long range scale cannot see an object through the curvature of the earth simply because that scale is available.

The planner uses a simplified standard refraction relationship: distance in nautical miles is approximately 1.22 multiplied by the sum of the square roots of scanner height and target height, both in feet. This is an educational estimate, not a detection range prediction. Atmospheric conditions, sea state, target material and shape, radar settings, obstructions, and equipment performance can change the return you actually see. Use the illustration to compare scenarios rather than establish a navigation margin.

Give Close Range Performance A Separate Review

Long range figures are easy to compare on a product page. Your everyday operating view may demand something else: distinguishing nearby boats, reading a narrow channel, or understanding returns around a breakwater. Ask how the proposed system supports the short range views you expect to use and which features remain available when you change range scales or display layouts.

Antenna beamwidth, processing, installation position, and user settings all contribute to the result. No single specification summarizes the entire picture. A radar with a strong feature list can still be difficult to use if it occupies a small pane on an overloaded screen. Include the planned helm layout in the review. Decide where the operator will see radar, chart information, and relevant vessel data without repeatedly hiding the information needed for the current situation.

Separate Radar Features From Operating Decisions

Modern systems may offer Doppler based target coloring, automatic tracking functions, dual range presentations, or specialized processing. Availability and behavior depend on the model and compatible display. A feature name should prompt a practical question: what does the operator need to set up, what supporting sensor data is required, and what does the display show when the information is uncertain?

Automated information still requires interpretation. Tracking limits, clutter, changing target aspects, and interrupted returns can affect what appears on screen. Radar supports situational awareness alongside a proper lookout and other appropriate navigation resources; it does not establish that an area is clear. Ask for an operational handover with the installed system. Learning controls, alarms, gain, clutter settings, and range selection on familiar water is part of obtaining value from the equipment.

Check Display And Sensor Compatibility Before Ordering

The scanner is one component of the radar system. The display must support the exact scanner and the features you want to use. Existing network hardware, power arrangements, and software versions can affect what is possible. A refit that keeps the present multifunction display may therefore have a different shortlist from a project replacing the entire helm.

Record the current display and radar model numbers rather than describing them only by screen size or brand. Include any heading sensor, compass, or network equipment relevant to the intended functions. Ask Concord to review the supported configuration against current manufacturer documentation. If you intend to add another display later, include that requirement now. Planning the connection architecture before purchase is usually simpler than discovering a missing capability after the scanner has been mounted.

Evaluate The Mounting Position As Part Of The System

A good mounting position needs a suitable structure, a clear operating envelope, and a cable route that can be installed and serviced correctly. Masts, hardtops, stacks, and other equipment can create shadow sectors. Raymarine's installation guidance specifically calls for identifying shadow areas during installation. Raising the scanner is not a universal solution when the new position creates other structural, access, or clearance problems.

For an open array, the rotating sweep must remain clear under the conditions described by the manufacturer. For every radar, follow the exact RF exposure distances, separation requirements, electrical instructions, and warnings in its installation manual. The selector does not assess those requirements or approve a location. Provide photographs and dimensions for professional review, and keep people out of restricted areas while transmitting in accordance with the installed equipment's instructions.

Keep The Installed System Ready Between Trips

Include radar in the vessel electronics maintenance routine described by the equipment manufacturers. Inspect accessible cables and mounting hardware when appropriate, and keep records of changes made during service. If the picture changes unexpectedly after other equipment is installed, consider whether the new structure or wiring has affected the radar system. An intermittent connection or a new shadow sector can be mistaken for a limitation of the scanner itself.

Review the operating setup when crew or use patterns change. A person unfamiliar with the helm should know how to access the radar view and understand the basic limitations before relying on the display underway. Save the product documentation where it can be found, and preserve the commissioning information for future troubleshooting. These ownership details support a dependable system over time and give a service technician a clearer starting point when performance needs investigation.

Plan Commissioning And The Next Conversation With Concord

Keep the selector result with your boat information, operating profile, existing equipment list, and photographs of candidate mounting areas. Identify any fixed constraints, such as bridge clearance, access limitations, or the need to preserve an existing display. Explain the situations you want the system to support so the discussion stays connected to actual use.

The installation plan should address power, cabling, mounting, network configuration, alignment, and relevant sensor inputs. Agree on how the system will be commissioned and what the operator will receive at handover. Useful documentation includes the final component list, connection arrangement, and any known blind sectors or operating limitations. Concord can review the equipment and installation together, helping turn a category recommendation into a configuration that makes sense for the vessel rather than a scanner purchase in isolation.

Frequently asked questions