Garmin GPSMAP 66i vs Suunto A-10 Compass

Weight and specs compared for 2026 — and which one to choose.

Suunto A-10 Compass is the lighter option — 202 g lighter than the Garmin GPSMAP 66i (88% less weight). If grams matter to you, that is the one to beat.

Spec	Garmin GPSMAP 66i	Suunto A-10 Compass
Weight	230 g · 0.230 kg · 0.51 lb	28 g · 0.028 kg · 0.06 lb
Brand	Garmin	Suunto
Category	Navigation	Navigation

Garmin GPSMAP 66i

230 g

Robust handheld GPS with inReach satellite communicator for two-way messaging. Preloaded topographic maps with 100-hour battery life.

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Suunto A-10 Compass

28 g

Classic baseplate compass for map navigation.

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Garmin GPSMAP 66i vs Suunto A-10 Compass: which should you buy?

If saving weight is your priority, the Suunto A-10 Compass wins — at 28 g it is 202 g (88%) lighter than the Garmin GPSMAP 66i (230 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest navigation page, or browse the full gear weight database.

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