PLB Comparison Chart NZ: McMurdo vs Ocean Signal vs GME (2026)

Three solid PLBs, one honest comparison. Here's how the McMurdo FastFind 220, Ocean Signal RescueMe PLB1 and GME MT610G actually stack up, spec for spec.

Every PLB on the market does the same core job: send a distress signal with your location to search and rescue. So what actually separates a $539 personal locator beacon from a $599 one? Not much on the surface, and that's exactly why a proper side-by-side comparison matters more than any single spec sheet read in isolation.

We stock three genuinely solid PLBs, and rather than tell you one is simply "the best," here's how the McMurdo FastFind 220, Ocean Signal RescueMe PLB1 and GME MT610G actually stack up against each other, so you can weigh the real trade-offs yourself.

// Key Takeaways

All three PLBs transmit on 406MHz to the Cospas-Sarsat network with a minimum 24-hour operating life, no subscription fees, and free registration with RCCNZ.
The Ocean Signal RescueMe PLB1 is the lightest at 116g, but needs a flotation pouch attached to float, which is mandatory under NZ and Australian regulations for this model.
The GME MT610G is inherently buoyant on its own, no separate pouch required, and combines that with IP68 waterproofing and dual GPS/Galileo positioning.
The McMurdo FastFind 220 also uses dual GPS/Galileo positioning and sits in the middle on both weight and price.
Battery life and warranty period are near-identical across the range, so the real decision usually comes down to weight, buoyancy, and how you'll actually carry it.

// Contents

The Comparison Chart
What the Numbers Actually Mean
Which PLB Suits You
Don't Forget Registration
Frequently Asked Questions

01 · The Chart

The Comparison Chart

Spec	McMurdo FastFind 220	Ocean Signal RescueMe PLB1	GME MT610G
Price	$598.00 NZD	$599.00 NZD	$539.00 NZD
Weight	~152g	116g	~160g
Positioning	GPS + Galileo	GPS (66-channel)	GPS + Galileo (72-channel)
Waterproof Rating	10m	15m	IP68
Buoyancy	Needs flotation pouch	Needs flotation pouch (mandatory NZ/AU)	Inherently buoyant, no pouch needed
Minimum Operating Life	24 hours	24+ hours	24+ hours
Battery / Warranty	6-year storage life	7-year battery & warranty	7-year battery, 6-year warranty
Subscription	None	None	None

All figures are drawn from manufacturer specifications for the exact models we stock. Weight and waterproofing figures can vary slightly between sources depending on measurement method, so treat these as a reliable guide rather than a certified test result.

02 · The Detail

What the Numbers Actually Mean

Positioning: GPS vs GPS + Galileo

All three use GPS. The FastFind 220 and MT610G add Galileo, the European satellite system, giving a faster initial fix and better reliability in tricky terrain like gorges or dense bush. The RescueMe PLB1 relies on GPS alone. In practice this narrows the gap between the beacons a little rather than closing it entirely, since Cospas-Sarsat's satellite-only detection still backs up every beacon regardless of GNSS system.

Buoyancy: The Genuinely Practical Difference

This is where the three separate out most clearly. The GME MT610G floats on its own, nothing extra to attach or remember. The RescueMe PLB1 and FastFind 220 both need a flotation pouch to float, and for the RescueMe PLB1 specifically, that pouch is a mandatory permanent fitting under NZ and Australian regulations because of the unit's small size. If you're prone to losing small attachments, or want one less thing to check before heading out, that's a real practical factor, not just a spec sheet line.

Weight vs Waterproofing

The RescueMe PLB1's 116g makes it the lightest by a meaningful margin, genuinely noticeable clipped to a lifejacket or pack strap over a full day. It also carries the deepest waterproof rating at 15 metres. The MT610G and FastFind 220 both sit heavier, though the difference is modest, roughly 30-45 grams either way.

03 · Making the Call

Which PLB Suits You

Best for Boaties Wanting No Extra Steps

GME MT610G

$539.00 NZD

View product →

Best for Minimal Weight and Bulk

Ocean Signal RescueMe PLB1

$599.00 NZD

View product →

Best for Backcountry and Tricky Terrain

McMurdo FastFind 220

$598.00 NZD

View product →

If you want the fuller write-up on the FastFind 220 specifically, including how its dual GNSS positioning works, we've covered that in our McMurdo FastFind 220 guide. For the broader EPIRB versus PLB decision, our EPIRB and PLB buyers guide covers that ground.

04 · Registration

Don't Forget Registration

Whichever of these you choose, it needs to be registered with Rescue Coordination Centre New Zealand before you rely on it. Registration is free, takes a few minutes, and is what lets rescuers confirm a genuine emergency and respond quickly, rather than working from an anonymous signal. It's also a legal requirement for 406MHz beacons in New Zealand, not an optional step.

Frequently Asked Questions

Common questions comparing these PLBs

The Ocean Signal RescueMe PLB1 is the lightest at 116g, a meaningful margin over the McMurdo FastFind 220 (approximately 152g) and the GME MT610G (approximately 160g). If minimising weight and bulk on a lifejacket or pack strap is your priority, the RescueMe PLB1 has the clearest edge.

No. The GME MT610G is inherently buoyant and floats without any additional attachment. The McMurdo FastFind 220 and Ocean Signal RescueMe PLB1 both need a flotation pouch to float, and for the RescueMe PLB1 specifically, that pouch is a mandatory permanent fitting under NZ and Australian regulations due to the unit's compact size.

It gives a faster initial position fix and more reliable positioning in challenging terrain such as gorges or dense bush, compared to relying on GPS alone. Both the McMurdo FastFind 220 and GME MT610G use dual GPS/Galileo positioning, while the Ocean Signal RescueMe PLB1 uses GPS only. All three still benefit from Cospas-Sarsat's satellite-based detection as a backup regardless of GNSS system.

No. All three transmit directly to the government-funded Cospas-Sarsat search and rescue network, which has no subscription, monthly fee, or airtime charge for any of these devices. The only ongoing cost across the range is periodic battery replacement, typically covered by the multi-year warranty period.

Not really, the price difference between these three models is modest and doesn't map neatly onto quality. The GME MT610G is actually the least expensive of the three while offering inherent buoyancy and dual GNSS, features the pricier options don't all match. The right choice comes down to which trade-offs, weight, buoyancy, or positioning technology, matter most for how you'll use it.

Yes. Our team can talk through how you'll actually use the beacon, boating, tramping, hunting, or general backcountry use, and help you weigh the real trade-offs between these three rather than just pointing you at the most expensive option.

Still Deciding Between These Three?

Mobile Systems Limited has supplied emergency beacons and satellite safety equipment from Mount Maunganui for over 25 years, with brand-independent advice and nationwide equipment supply.

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