Brunton TruArc 15 vs SPOT Gen4 Satellite GPS

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

Brunton TruArc 15 is the lighter option — 109 g lighter than the SPOT Gen4 Satellite GPS (73% less weight). If grams matter to you, that is the one to beat.

Spec	Brunton TruArc 15	SPOT Gen4 Satellite GPS
Weight	40 g · 0.040 kg · 0.09 lb	149 g · 0.149 kg · 0.33 lb
Brand	Brunton	SPOT
Category	Navigation	Navigation

Brunton TruArc 15

40 g

Global needle compass. Works anywhere on Earth.

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SPOT Gen4 Satellite GPS

149 g

One-way satellite tracker with SOS capability.

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Brunton TruArc 15 vs SPOT Gen4 Satellite GPS: which should you buy?

If saving weight is your priority, the Brunton TruArc 15 wins — at 40 g it is 109 g (73%) lighter than the SPOT Gen4 Satellite GPS (149 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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