Raymarine Quantum 2 vs Garmin Fantom 18x: which system fits?

Keep a supported existing display ecosystem unless replacing it solves another real problem. For a new installation, Quantum 2 deserves attention where scanner power and weight matter; Fantom 18x belongs on a Garmin shortlist. The table describes hardware differences, not measured detection superiority.

#The published differences

Shaded rows contain different values. On a small screen, scroll the table; model names stay visible within it.

Sources: Raymarine Quantum 2 specifications and Garmin installation instructions. Published electrical maxima are planning figures from different operating descriptions, not a like-for-like measured energy test. Transmitter output power is another quantity entirely.

#Example: a cruising yacht changing its helm

Imagine a yacht with a sound Raymarine display, a tired scanner and limited battery capacity. Our first quote would retain the display if its exact version supports Quantum 2. A second quote can price the Garmin route, but must include its display, network changes and any sensors affected. Comparing scanner prices alone would conceal the largest change.

For a new helm without retained equipment, ask the crew to perform the same tasks on both proposed displays: change range, acquire a target, return to the chart and find the radar controls at night. The better layout for that crew can matter more than a small difference in nominal beamwidth. This is a suggested demonstration, not a reported trial result.

#Installation changes the decision

Have the installer check bracket capacity, clearance, cable passage and access. Add the bracket and cable loads to the scanner weight before assessing a mount. For a yacht, consider the headsail's movement as well as the appearance of the installation alongside the dock.

Raymarine's wireless option can alter the data-cable plan, but it does not remove the power cable or compatibility check. Ask how imagery and heading data reach the display separately. A common NMEA 2000 backbone does not make the two scanners interchangeable. The compatibility guide explains the complete connection path.

#Our buying verdict

Shortlist Quantum 2 for a compatible Raymarine refit where its published electrical demand and weight fit the brief. Shortlist Fantom 18x for a Garmin installation whose supported features and controls suit the crew. Request Australian quotes for the whole working system, including commissioning; we have not verified installed totals.

Before paying for an ecosystem change, write down the specific benefit it purchases. If that benefit is simply a longer advertised range or a higher rotational speed, ask for a demonstration relevant to your normal use. Neither number proves that a small target will be detected in the conditions you encounter.

#The complete-system crossover is the real price comparison

On a yacht retaining a supported Raymarine display, the Quantum proposal may preserve the helm, charts and familiar controls. On a boat with a suitable Garmin installation, Fantom may preserve those investments instead. These are retention advantages, not evidence of better detection. Identify every part that survives each proposal and every part that changes.

Shaded rows contain different values. On a small screen, scroll the table; model names stay visible within it.

A budget project often benefits from retaining proven equipment, but not when that equipment is unsupported or unreliable. A no-limit project should still explain why changing the whole system produces a useful improvement. Compare complete written quotes with the same exclusions and acceptance conditions.

#What the power and rotation rows cannot tell you

The published electrical figures use different operating descriptions. They can support a preliminary power discussion, but they do not constitute a measured energy comparison over a yacht’s passage. Likewise, a maximum rotation figure is not a claim that every mode runs at that rate or that the faster headline always produces a better decision for the operator.

Record the desired use: close manoeuvring, coastal traffic, offshore passage monitoring or training. Ask the supplier to demonstrate the relevant views and explain the required inputs. Evaluate the physical controls and readability at the installed helm. A scanner’s specification advantage may have little practical value if the crew cannot quickly select and interpret its picture.

For a 32-foot monohull, cabin wiring access and available energy may determine the sensible package. On a 50-foot cruiser, station layout and the backup strategy may dominate. Read Raymarine versus Garmin for the broader refit decision, and use the radar practice scenario to plan learning after acceptance.