The GPSMAP 421 is a compact chartplotter that features an ultra-bright 4” QVGA color display along with an improved high-speed digital design for increased map drawing and panning speeds. It’s ready to go with a built-in, satellite-enhanced worldwide basemap and an easy-to-use interface designed to help you navigate the open waters with ease. The GPSMAP 421 also accepts BlueChart® g2 Vision cards for added features and functionality such as high-resolution satellite imagery, 3D views and Auto Guidance technology.

View Satellite-enhanced Worldwide Basemap

The GPSMAP 421 basemap contains worldwide satellite images in place of traditional maps. The GPSMAP 421 also comes standard with a high-sensitivity GPS receiver for superior satellite tracking and quicker acquisition times. In addition, the GPSMAP 421 can receive U.S. graphical weather data via optional GXM 51 satellite receiver/antenna. And with an SD card slot, it’s easy to add additional maps without connecting to a computer.

Add Sonar

Where applicable, the sounder version, GPSMAP 421s, comes with a powerful dual-frequency transducer that clearly illustrates depth contours, fish targets and structures whether you’re fishing in freshwater or off the coast. The GPSMAP 421 and GPSMAP 421s are also NMEA 2000-certified for easy connectivity with sensors, instruments and future marine offerings.

Add Extras with BlueChart g2 Vision

With the optional BlueChart g2 Vision SD card, you can add a whole new dimension of exceptional features to your chartplotter.

• 3D Mariner’s and Fish Eye view provides you with a 3-dimensional perspective of map information, both above and below the waterline
• High-resolution satellite images and aerial photographs help you orient yourself in unfamiliar areas
• Auto Guidance technology searches through all relevant charts to create a route you can actually follow — one that avoids obstacles, shallow water, buoys and other obstructions

What's in the Box:

• GPSMAP 421/421s*
• Tilt/swivel mount
• Protective front cover
• Power/data cable
• Documentation

*Sounder available with and without dual-frequency transducer. See versions tab for details

Manuals

1. Important Safety and Product Information (ML), Rev. D, Mar, 2009  |  Download
2. Installation Instructions (EN), Rev. A, May, 2009  |  Download
3. NMEA 2000 Network Fundamentals, Rev. B, Feb, 2009  |  Download
4. Owner's Manual, Rev. A, May, 2009  |  Download
5. Quick Reference Guide, Rev. A, May, 2009  |  Download
6. DA brugervejledning, Rev. A, Jun, 2009  |  Download
7. DA Installationsvejledning, Rev. A, Jun, 2009  |  Download
8. DA lynvejledning, Rev. A, Jun, 2009  |  Download
9. DE Benutzerhandbuch, Rev. A, Jun, 2009  |  Download
10. DE Installationsanweisungen, Rev. A, Jun, 2009  |  Download
11. DE Kurzanleitung, Rev. A, Jun, 2009  |  Download
12. EL Owner's Manual (Greek), Rev. A, Jun, 2009  |  Download
13. EL Quick Reference Guide (Greek), Rev. A, Jun, 2009  |  Download
14. ES guia de referencia rapida, Rev. A, Jun, 2009  |  Download
15. ES Instrucciones de instalacion, Rev. A, Jun, 2009  |  Download
16. ES manual del usuario, Rev. A, Jun, 2009  |  Download
17. FI kayttoopas, Rev. A, Jun, 2009  |  Download
18. FI pikaopas, Rev. A, Jun, 2009  |  Download
19. FR Guide de reference, Rev. A, Jun, 2009  |  Download
20. FR Instructions d installation, Rev. A, Jun, 2009  |  Download
21. FR Manuel d utilisation, Rev. A, Jun, 2009  |  Download
22. HR korisnicki prirucnik, Rev. A, Jun, 2009  |  Download
23. HR kratke upute, Rev. A, Jun, 2009  |  Download
24. IT guida di riferimento rapido, Rev. A, Jun, 2009  |  Download
25. IT Istruzioni di installazione, Rev. A, Jun, 2009  |  Download
26. IT Manuale Utente, Rev. A, Jun, 2009  |  Download
27. NL gebruikershandleiding, Rev. A, Jun, 2009  |  Download
28. NL verkorte handleiding, Rev. A, Jun, 2009  |  Download
29. NO brukerveiledning, Rev. A, Jun, 2009  |  Download
30. NO hurtigveiledning, Rev. A, Jun, 2009  |  Download
31. NO Installeringsinstruksjoner, Rev. A, Jun, 2009  |  Download
32. PT manual de referencia rapida, Rev. A, Jun, 2009  |  Download
33. PT manual do utilizador, Rev. A, Jun, 2009  |  Download
34. PT manual do utilizador, Rev. A, Jun, 2009  |  Download
35. RU Owner's Manual (Russian), Rev. A, Jun, 2009  |  Download
36. RU Quick Reference Manual (Russian), Rev. A, Jun, 2009  |  Download
37. SV Anvandarhandbok, Rev. A, Jun, 2009  |  Download
38. SV Installationsinstruktioner, Rev. A, Jun, 2009  |  Download
39. SV Snabbreferenshandbok, Rev. A, Jun, 2009  |  Download