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Garmin GPSMAP 478

Garmin GPSMAP 478
alaScore 74

225 reviews

Oct, 2015

alaTest has collected and analyzed 225 reviews of Garmin GPSMAP 478. The average rating for this product is 4.4/5, compared to an average rating of 4.0/5 for other GPS for all reviews. Comments about the screen and size are generally positive. The performance and price also get good reviews.

usability, price, performance, size, screen

We analyzed user and expert ratings, product age and more factors. Compared to other GPS the Garmin GPSMAP 478 is awarded an overall alaScore™ of 74/100 = Good quality.

Review analysis

(Based on 225 reviews)

User Reviews  

Showing 225 review(s)

Expert Reviews User Reviews
Showing 1 - 225 of 225 Show Reviews: in English

Consumer review by: ( review summary for Garmin GPSMAP 478


alaTest has collected and analyzed 219 user reviews of Garmin GPSMAP 478 from The average user rating for this product is 4.4/5, compared to an average user rating of 4.0/5 for other GPS on People are impressed by the route planning and screen. The size and performance are also mentioned favorably, but some have doubts about the price.

usability, performance, size, screen, route planning


93% of the reviews on give this product a positive rating.

This summary is based on the products: Garmin GPSMap 478 GPS Navigator and ChartplotterGarmin GPSmap 478 GPS ReceiverGarmin GPSMap 478 GPS Navigator and Chartplotter - 010-00543-00

Oct, 2015

Consumer review by: Tony Moore (



Better instructions - more visual aids such as flow diagrams and decision trees would be helpful in navigating the instrument. I was very pleased with the ordering process and service from PC Nation and would definitely consider using you again.

Fairly compact device with tremendous capability. Works well as a marine navigational tool and as a highway map and route device. 12v plug with microphone works very well. While the price is high the capability and versatility of the device justifies...

It is complex and learning to use it effectively is difficult.

Sep, 2007

Consumer review by: Oby (

GPSMAP 479 Rev1


Own it since July 2006. Excelent for Marine navigation with the g2 chart Technology. Fast Calculation for Road navigation. Higway navigation display is only a line to follow and it is not displayed like i.e. NUVI 3D navigation(but good for marine...

Aug, 2007

Consumer review by: katrinakaif (

Super GPS


The new Garmin GPSMAP 378 and GPSMAP 478 portable GPS navigators have been announced, said to be the world's first portable GPS Navigators with pre-loaded Land and Sea cartography, comprehensive maps and charts. "Our customers want GPS navigators that...



Jan, 2009

Consumer review by: tdog (



I have had 2 TOM-TOMs, a SONY, and something else in 8 months. THIS is the only way to go.

Acquires Satellites Quickly, Compact, Easy Menus, Easy To Read, Easy To Set Up, Large Screen, Simple Controls

Oct, 2008

Consumer review by: krishna (

Nice GPS


Used the Web Updater from Garmin and had a problem where the g2 maps seemed to disappear. It was very easy to get a tech support rep on the phone who helped me turn off the automotive maps in order to see the g2 charts. For some reason, the updater...

Screen resolution is very good for its size


Oct, 2008

Consumer review by: Rosocorrecto (

There is a downside . . .


While the 478 is a powerful GPS, there is a downside. Battery life is very short and the repacement batteries are expensive. If I had it to do over, I'd buy Magellan.

Acquires Satellites Quickly, Compact, Easy Menus

Short Battery Life, Unreliable

Jul, 2008

Product Specifications

Go from box to boat to dash with the portable and versatile GPSMAP 478. This combination color chartplotter and land navigator comes preloaded with U.S. marine charts utilizing elements of the latest BlueChart g2 technology, in addition to detailed street-level mapping. Optional weather and sonar capabilities combined with the ability to conveniently add plug-in data cards, let you easily add more maps and features - making this one incredible GPS navigator for land and sea. PRODUCT FEATURES: Accepts the latest (optional) BlueChart g2 data cards; Add optional GSD 21 for full-feature sonar capability; Add optional GXM 30 antenna for XM WX Satellite Weather; Provides tides and built-in celestial information; NMEA 0183 input and output; Removable quad helix antenna; Single knob tilt/swivel mount.


Run Time (Up To):15hour(s)

Built-in Display

Diagonal Size:3.8"
Diagonal Size (metric):9.7 cm
Resolution:480 x 320

Dimensions & Weight


GPS System

Receiver:12 channel
Recommended Use:Marine
Type:GPS receiver


Packaged Quantity:1
Product Line:Garmin GPSMAP


Waterproof: Yes


Tracklog Points:10000