Garmin Astro 320 Review: GPS Dog Tracker


The Garmin Astro 320 is the most simple and has the least features when compared to the Garmin 430 and Alpha 100.

As we point out in this Garmin Astro 320 Review, the 320 is a tracking only handheld, and works best with either the T5 or T5 Mini collar devices.

Also in this review we outline the features, and pros and cons of using this handheld dog tracking GPS system.

Let’s look at it in closer detail!


(NOTE: this is a general information guide only, and is not professional advice, or a substitute for professional advice. A qualified vet or animal expert is the only person qualified to give you expert advice in regards to your pet/s)

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Garmin Astro 320 Review: Dog Tracking & GPS System/Handheld

You can go straight to viewing the Astro 320 here if you like:


Garmin Astro 320: Review


A Garmin handheld device used for tracking only (not training)

View your dog’s position, see dog info pages, see a dog tracking compass + more

Great for sporting dogs

Is best compatible with the T5 or T5 Mini collars

Also compatible with the TT15 collars, but you can’t use the training functions because the Astro 320 is not designed for training

You can track up to 10 dogs at a time from the 320 handheld, which means you can have up to 10 total collar devices connected to it

With the T5 you’ll get 9 miles range from the collar to the handheld, and with the T5 mini you’ll get 4 miles

The physical dimensions of the 320 are 2.4″ x 6.3″ x 1.4″

It weighs 9.2 oz with the batteries

The 320 comes with a preloaded worldwide basemap – there’s also optional BirdsEye Satellite Imagery and TOPO maps

It has a 2.6 inch color display screen (diagonally), with 160 x 240 pixels resolution

The battery life is up to 20 hours using 2 AA batteries (NiMH or Lithium are recommended)

IPX7 Water rating

1.7GB Memory

USB interface

Storage is via a microSD™ card

Ability to have 2000 waypoints

Ability to have 200 routes

10,000 points, 200 saved tracks for the track log

Has a barometric altimeter

Has a tilt-compensated 3-axis compass

Has area calculation

Has automatic routing (turn by turn routing on roads)

Allows geocaching

Allows custom maps

Has hunt/fish calendar, and sun and moon information

Runs of a MURS frequency band – The T 5, T 5 mini, TT™ 15 and TT 15 mini are only compatible with the Astro® 320 and the Alpha™ 100. T 5, T 5 mini, TT 15 and TT 15 mini can be configured for operation with either handheld but cannot be tracked simultaneously by both the Astro 320 and the Alpha 100



A tracking system only – no ability to train or use correction cues with it like static, vibration, and sound

For the price, it’s worth considering the Astro 430, or even the Alpha 100 – both of which have more features




Garmin Astro 320: Buyer’s Guide

What Is The Garmin Astro 320 Designed For?

GPS tracking of up to 10 dogs at a time. It works with the T5 or TT15 Garmin collars, although with the TT15 you can’t use the training functions because the 320 isn’t a training handheld.


Who Might The Garmin Astro 320 Be For?

People looking for a handheld for tracking only (not for training)

People looking for a handheld that works best with the T5 or T5 mini Garmin collars


Who Might The Garmin Astro 320 NOT Be For?

People who think the Astro 430 or the Alpha 100 are better handhelds for them (both have more features and are more advanced than the 320)

People who want a handheld for training, as well as tracking


What Do You Get In The Garmin Astro 320 Kit?

The Astro 320 comes with 3 main kits – the T5 bundle, the T5 mini bundle and the 320 handheld standalone.

As an example, the kit with the T5 looks similar to this:

Astro 320 handheld

T 5 dog device with rechargeable lithium-ion battery

1-inch orange collar strap

5-inch standard and 13-inch extended range antennas (for Astro)

18.5-inch standard and 22.5-inch extended range antennas (for T 5)

Belt clip

Charging clip

USB cable

AC adapter

Vehicle charging adapter



Other Dog GPS Collars & Trackers

You can read more about some of the best dog GPS collars and trackers in this guide.



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