Garmin GPSMAP 421s Sounder with Dual Frequency Transducer Q&A

The GPS SuperStore.™ Since 1994.

USA & International

1-866-GPS-CITY • Live Chat

Cart (0)

Testimonials

Product Videos

Home > GPS Receivers > Marine GPS
Garmin GPSMAP 421s Sounder Marine GPS with Dual Frequency Transducer

Garmin GPSMAP 421s Sounder with Dual Frequency Transducer Q&A (Question & Answer)
If you have a question about the Garmin GPSMAP 421s Sounder with Dual Frequency Transducer , enter it here. Our tech staff moderates this Q&A and typically respond within 24 hours (72 hours if a weekend). Visitors are also welcome to chime in at your convenience. No login required.

» Enter a new question for this item	» Return to Q&A Page

#	Question	User	Replies	Latest Post
1.	› Is this compatible with part# 010-C1032-00 Alberta inland maps?	chris	3	11 days ago
2.	› Would adding the BlueChart g2 Vision SD card to this be the same as a 441s?	Jerry	2	33 days ago
3.	› What version of software is with the GPSMAP 421s?	Michael	2	58 days ago
4.	› Problem with screen display, blurry and not all there?	Scott	3	75 days ago
5.	› Does the 010-10192-01 come with 25feet of cable?	Jimmy	1	112 days ago
6.	› What transducer to use with the Garmin GPSMAP 421s?	Jimmy	1	114 days ago
7.	› Is the newer G2 Vision card compatible with the Garmin GPSmap 178?	Chris	1	174 days ago
8.	› Does this read surface temp only?	James	1	174 days ago
9.	› Disconnect the unit from the boat for storage?	Paul	1	233 days ago
10.	› Is this compatible with the microSD Card BlueChart g2 Canada HXCA015R?	Jack	1	318 days ago
11.	› What is the 421s sonar transducer power?	Mark	1	333 days ago
12.	› What is the best location for the GPS unit 421?	Segie	1	343 days ago
13.	› What is needed for a 2nd mounting option?	Desmond	1	343 days ago
14.	› Problem reading G2 Vision card?	JIM ZACK	1	362 days ago
15.	› Is there any map available for Lake Muskoka in Ontario?	ilmar	1	1 years ago
16.	› Will this SD card work with the GPSMAP 421S?	Corey	1	1 years ago
17.	› Is this compatibility with Topo mapping?	Joe	7	1 years ago
18.	› Does the 421s unit have distance, speed and depth unit selection?	Phill	1	1.1 years ago
19.	› What chart is for Massachusetts Bay?	John	1	1.1 years ago
20.	› Is there a GPS that uses legal land descriptions?	Vince	1	1.1 years ago
21.	› Which Vision card to use?	Ivan	3	1.3 years ago
22.	› What is the difference between dual beam and dual frequency?	stefane	3	1.4 years ago
23.	› Will this unit accept external antenna?	Joe	8	1.5 years ago
24.	› Is there a 12V adapter for the 421s?	Greg	1	1.8 years ago
25.	› Is there a Garmin external antenna jack adapter?	scott	1	1.8 years ago
26.	› Problem with screen clarity?	scott	6	2 years ago
27.	› Is transducer through-hull in-hull or transom-mounted?	Dmitri	1	2 years ago
28.	› Is this compatible with Topo maps?	LUC RICHARD	3	2.1 years ago
29.	› What charts are provided with GPSMAP 421s?	RadioHam	1	2.1 years ago
30.	› Can this display water temperature?	Cheryl	1	2.4 years ago

Follow:

Learn:

Videos, Q&A, Reviews

Gallery

Buzz:

Garmin GPSMAP 421s Sounder Marine GPS with Dual Frequency Transducer

Garmin GPSMAP 421s Sounder with Dual Frequency Transducer