Garmin etrex20
10月15日にファームウェアが4.1にアップされていました。
4.0を出してすぐに4.1が出たようです。
不具合でもあったのでしょうか。
eTrex20_30_Webupdater__410.gcd



Changes made from version 4.00 to 4.10:
Fixed possible issue where BirdsEye satellite imagery would be permanently disabled after booting

Changes made from version 3.90 to 4.00:
Improved cartography support (Garmin Hunt View maps)
Improved boot time when a large amount of BirdsEye satellite imagery is present
Improved pairing behavior with cadence sensors (eTrex 30 devices)
Fixed possible issue with waypoint ordering when sorting method is set to 'Nearest'