All of these units are 12 channel parallel receivers with similar
sounding specs for lock times. The new Magellan 310 is a blazer with a
computer/dgps interface. There are many differences between the other
units. Here is a table based primarily on published specs and a brief
review in a showroom.
|feature||Blazer 12 and 310||Garmin 12||Garmin ETREX||Garmin Geko 101||Notes|
|routes||1||20||1||0||Etrex can use tracklogs like routes|
|pos average||no||yes||no||no||only on saving a waypoint|
|mob||no||yes||no||no||man over board waypoint|
|batteries||2 AA||4 AA||2 AA||2 AAA|
|batt life||20||24 w/ battery save||22 w/ battery save||12 w/ battery save||hours|
|tracklog||no||1024||1536 plus 10 saved logs of 125 each||3000||points|
|trackback||no||yes||yes - any of the 10 saved logs||Yes|
|grids||7||12||14||12||Garmin can format lat/lon 3 ways.|
|datums||11||107 + user||> 100 + user||38 + user|
Other Similar GPS receivers:
These single and dual channel scanning receivers have significantly inferior receiver operation as compared to the 12 channel Blazer, the etex and the G-12 but could be compared to each other.
The Magellan Pioneer also known as gps 300 is a sequential scan receiver that is otherwise similar to the blazer. Battery life is 24 hours.
Garmin GPS 38 is an obsolete Garmin model. It is a sequential scan receiver that is otherwise similar to the Garmin12. Battery life is 12-17 hours, waypoints 256, tracklog 768 points, 1 backlight level, a speed limit of 99 knots, and no position averaging. (used models are often available at good prices.)