Our Garmin 440s test unit shipped with an internal sounder, internal GPS receiver, and was preloaded with Garmin BlueChart g2 U.S. coastal cartography.
The pre-loaded charts covered a very large area that includes both U.S. mainland coasts from Canada to Mexico, Bahamas, Puerto Rico, Hawaii, Guam, and the Great Lakes.
Garmin 440s
The compact 400-series plotters measure 5-inches high by 5.7-inches wide and just under 3-inches deep. They are available in several configurations.
The small ‘s’ suffix appended to the model number indicates the unit has an internal sounder.
The middle number in the model designation identifies the pre-loaded cartography coverage area, 5 is UK/Australia, 4 is U.S. coastal, 3 is U.S. inland lakes, 2 is base map only.
All 400-series chartplotters are capable of using a single Garmin BlueChart g2 Vision card.
Shop for the latest Garmin 440-series chartplotter combos here.
We flush mounted the Garmin 440s using the optional kit. Power and NMEA 0183 data pass through a single cable that fastens to the case back with a twist lock connector. An additional leg on this cable connects the supplied transom-mount transducer to the display unit.
An optional external GPS sensor can be added if needed or desired and connects to the unit using a BNC twist lock. We used the internal antenna for our testing.
Screen Size and Viewability
The Garmin 440s will display aerial photos of certain harbors and points of interest when equipped with an optional Garmin Visions chart card.
All 400-series machines use a screen with a portrait layout that measures 4-inches on the diagonal and carries 320 x 240 pixel resolution.
When viewed straight on the screen darkens slightly when we looked at using polarized sunglasses. No screen fogging was apparent in the display at anytime.
The 440s has two color palettes, day and night. The night palette uses darker coloration to enhance night viewing.
Operation
This Garmin chartplotter fishfinder uses a small number of pushbuttons to manipulate onscreen menus that lead the user through each function. As with other 400- and 500-series units it all starts on the Home page where the user can select from six main pages, Chart, Sonar, Chart/Sonar, Where To, Information, and Configure.
Waypoints
The Garmin 440s can store up to 1500 waypoints and 20 routes. Waypoints are identified by choosing one of 70 symbols and using up to ten characters in the name. Creating a waypoint at present position is done with a tap of the Mark button. You can then edit, delete, select the point as MOB, or go back to the chart page. To navigate to a waypoint you select it from the chart page or waypoint list, and then actuate the Go To function. This puts data boxes up onscreen with course and distance to the waypoint, plus shows a course line to follow on the chart page.
Routes
The Information page leads the user through route building. Once there you work your way