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Garmin GPSMAP 378

Garmin GPSMAP 378
alaScore 83

160 reviews

Oct, 2017

alaTest has collected and analyzed 160 reviews of Garmin GPSMAP 378. The average rating for this product is 4.0/5, compared to an average rating of 4.0/5 for other GPS for all reviews. People really like the screen and performance. The maps and price also get good reviews, whereas there are some mixed views about the route planning.

usability, price, maps, performance, screen

We analyzed user and expert ratings, product age and more factors. Compared to other GPS the Garmin GPSMAP 378 is awarded an overall alaScore™ of 83/100 = Very good quality.

Review analysis

(Based on 160 reviews)

1 expert reviews

User Reviews  

Showing 151 review(s)

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Showing 1 - 151 of 151 Show Reviews: in English | in other languages (9)

Consumer review by: ( review summary for Garmin GPSMAP 378


alaTest has collected and analyzed 43 user reviews of Garmin GPSMAP 378 from The average user rating for this product is 4.0/5, compared to an average user rating of 3.9/5 for other GPS on Reviews about the size and screen are on the whole positive. The maps and price also get good feedback. Views are divided on the performance, and many are less positive about the durability.

usability, price, maps, screen, size


91% of the reviews on give this product a positive rating.

This summary is based on the products: Garmin GPSMAP 62 Handheld GPS WorldwideGarmin GPSMAP 62 Handheld GPS Worldwide

Oct, 2017

Consumer review by: ( review summary for Garmin GPSMAP 378


alaTest has collected and analyzed 101 user reviews of Garmin GPSMAP 378 from The average user rating for this product is 3.9/5, compared to an average user rating of 4.0/5 for other GPS on Reviewers are impressed by the maps and price. The size and performance are also mentioned favorably. There are some critical reviews about the reliability. There are some mixed opinions about the route planning and screen.

usability, performance, size, price, maps


82% of the reviews on give this product a positive rating.

This summary is based on the products: Garmin GPSMAP 78sc Waterproof Marine GPS and ChartplotterGarmin GPSMAP 78sc Waterproof Marine GPS and Chartplotter

Oct, 2017

Expert review by: Sal Cangeloso (

Review: Garmin GPSMAP 62 handheld GPS device


Garmin's GPSMAP 60 series is practically the standard by which all other handheld GPS devices are measured, at least at the enthusiast level. The product was released about five years ago and still is popular today, so you can bet its follow-up is a...

Aug, 2010

Consumer review by: Mike K (

Great for Small Boat Use and Geocaching


I got my Garmin 78sc a couple of weeks ago, to use not only on the water (Chesapeake Bay), but for hiking and geocaching. By now I've sailed for 3.5 days,(about 18 hours total run-time), before needing to change the alkaline batteries, so I'm fairly...

Lots of marine features and alarms, such as anchor drag alarm, low water depth alarm, (from map depths) Man Overboard function, etc. The coastal marine plots seem fairly good and accurate to the paper chart I have of Upper Chesapeake Bay ; Very fast at...

Price kinda high, but the accurate marine charts are worth it. Base maps (on land only--the marine charts are good) are a joke, and optional 100K topo map software are still sparsely populated

Oct, 2010

Consumer review by: Stephen G (



This is a very nice unit for the auto and boat. I had it about 3 weeks now and used it on long trips and performed well. Only problem that I have is that the voice sounds distorted so I will ask Garmin a replacement. Tiger GPS customer service etc is...

Oct, 2007

Consumer review by: Joseph Lagana (



Makes on water Travel Easy, also helps to get back to the Hot Fishing Spots. On the road, Tells you the Intersections coming up, Great at night, or when the Locals have removed the street signs!

Sep, 2007

Consumer review by: Mzee in Forks (

Garmin has its act together


I would buy it again. Needs maps for inland lakes and cities/highways, but one can't expect it to do everything. Garmin's ease of use is great. Color screen, customizable themes, menus, great reception. It floats, works as an alarm clock without...

Battery save feature ; Compass feature is handy ; Easy to use menus ; Fast initializing ; Good reception in timber ; Pre-loaded coastal charts

Manual is pdf ; Steeper learning curve

Sep, 2010

Consumer review by: bbudman (

Multi-Purpose GPS For The Car And Boat


I have used several different GPS devices over the years and Garmin builds some of the best automotive and boating units you can buy. My latest purchase was the Garmin GPSMAP 640. Although expensive, this unit packs plenty of features with the weekend ...

Built in maps. Auto and marine capable

Poor speaker. Expensive. Optional maps expensive

Apr, 2010

Consumer review by: PP34 (



Un super produit. Bonne ergonomie, bonne autonomie.Très bonne acquisition et une lisibilité plein soleil sans problème.Menus remaniés, prise en main facile. Possibilité de rentrer des cartes géo-référencées.Compas trois axes précis.Le TOP.

Nov, 2010

Product Specifications

Go from box to boat to dash with the portable and versatile GPSMAP 378. This combination color chartplotter and land navigator comes preloaded with maps for lakes throughout the continental U.S., in addition to detailed street-level mapping. The ability to conveniently add plug-in data cards lets you easily add more maps and features - making this one incredible GPS navigator for land and fresh water. From curbside to dockside, the GPSMAP 378 has you covered - no downloads or computer required. Its preloaded inland lake maps boast 10-meter resolution for more than 3200 lakes - many with depth contours. In addition, these built-in fresh-water maps provide shoreline detail, river and creek channels, islands, boat ramps, campgrounds and more for tens of thousands of lakes across the continental U.S. - giving you the freedom to boat and fish anywhere in the states. These maps also show streams and rivers, tide stations and predictions, a wrecks and obstructions database, and U.S. Coast Guard aids to navigation. For road trips, the 378 comes preloaded with City Navigator NT detailed street maps for North America and includes automatic routing with voice guidance along with an industry-leading database with more than six million points of interest - including hotels, restaurants, gas stations, marinas, attractions and more. These street maps are seamlessly integrated with the 378's lake maps. An included marine mount and automotive kit make it a snap to transfer the unit from boat to car. See real-time weather displayed on the 378's high-resolution 256-color sunlight-readable TFT display. View vital weather data, such as NEXRAD radar, storm cells, wind speeds, surface temperatures, forecasts and more than a dozen other weather attributes directly on the unit's display - so you can spend more time enjoying the water and less time worrying about the weather. The GPSMAP 378: loaded for fresh-water fun, right out of the box.

GPS type

Bicycle: No
Motorcycle: No