Updates & Downloads


Astro 320 software version 4.20

as of January 12, 2015

Use Garmin Express to install this file.

(7.45 MB)

View system requirements


Change History

Changes made from version 4.10 to 4.20:

Changes made from version 4.00 to 4.10:

Changes made from version 3.90 to 4.00:

Changes made from version 3.80 to 3.90:

Changes made from version 3.70 to 3.80:

Changes made from version 3.60 to 3.70:

Changes made from version 3.40 to 3.60:

Changes made from version 3.30 to 3.40:

Changes made from version 3.20 to 3.30:

Changes made from version 3.10 to 3.20:

Changes made from version 2.80 to 3.10:

Changes made from version 2.70 to 2.80:

Changes made from version 2.50 to 2.70:

Changes made from version 2.40 to 2.50:

Changes made from version 2.30 to 2.40:

Changes made from version 2.20 to 2.30:

System requirements

  1. IBM-compatible PC running Windows XP or later operating system and an available USB port.