Eartec EVADE Marine Full Duplex Headsets NZ: Hands-Free Crew Communication

Why Push-to-Talk Radios Fall Short on the Water

A traditional two-way radio is a half-duplex system. Think of it as a single-lane bridge: only one person can cross at a time. Press the button, say your piece, release, and wait for the reply. It works fine for simple, spaced-out calls. It works badly when a crew needs constant back-and-forth under pressure.

Now put that radio on a working boat. Engine noise, wind, and wave slap already make speech hard to hear. Add in the half-second delay of keying a radio, plus the discipline of waiting your turn, and simple jobs like mooring or bringing in gear turn into a shouting match. Miss a word during a tight berthing manoeuvre or a crane lift and the outcome isn't just frustration. It's damaged gear, a blown schedule, or a genuinely dangerous moment.

The Cost of a Broken Communication Loop

On a crowded marina approach or during a heavy-gear deployment in a swell, every crew member needs to hear instructions the instant they're given, not a beat later. A skipper coordinating a docking manoeuvre, or a crane operator working with a spotter, doesn't have time for "say again."

This is exactly the gap full duplex headsets are built to close. Instead of a single-lane bridge, picture a motorway with lanes running both ways at once. Everyone talks. Everyone hears. Nobody waits.

How Eartec EVADE Full Duplex Technology Works

Full duplex simply means a system that sends and receives audio at the same time, the same way a phone call works. Nobody keys a button. Nobody waits for a gap. Everyone on the system can speak and be heard continuously, which is what makes a fast-moving job feel like a normal conversation instead of a series of radio calls.

Frequency Hopping, Not a Fixed Channel

Eartec EVADE headsets operate in the licence-free 2.4GHz band using frequency-hopping technology. The compact transceiver built into each earcup constantly scans the environment and jumps to whichever channel is clearest at that moment, rather than sitting on one fixed frequency the way older UHF or VHF systems do.

That matters on a busy worksite or a marina packed with other wireless gear. Because the system is actively dodging interference rather than fighting for space on a single channel, the audio stays clear even when Wi-Fi, other radios, or nearby vessels are all competing for the same airwaves. No radio licence is required to operate an EVADE system in this configuration.

Built Around a Main and Remote Headsets

A standard EVADE system is built around one Main headset, which acts as the hub, and up to eight Remote headsets that link to it wirelessly. Every Remote headset can talk and listen to the Main and to every other Remote at the same time, giving a working crew of up to nine people a genuine open-mic conversation.

Need more than nine users, or a longer range? Eartec's CMod conference module can extend a system to 16 users, and a pair of CMod modules can link two channels into a combined system supporting up to around 30 users, all still in full duplex.

Eartec EVADE Hardware: What You Actually Get

Specs on a page are one thing. What matters is whether the gear survives a real shift on a working boat or site. Here's what the EVADE series genuinely delivers, without the exaggeration that sometimes creeps into product marketing.

Weather Sealing, Honestly Explained

EVADE headsets use a sealed silicone membrane over the buttons and a moisture-resistant speaker and mic assembly, designed to shrug off rain, sea spray, and everyday outdoor use. That's genuinely useful on an open deck or a wet worksite.

What it isn't is a certified IP67 or submersion-rated product. If a headset goes overboard or gets a full hose-down, treat that as a real risk to the electronics, not a design feature to rely on. We'd rather tell you that plainly now than have it be a surprise later.

Battery Life for a Full Shift

Each headset runs on a field-replaceable lithium battery, giving roughly 6 to 8 hours of continuous talk time per charge depending on the specific model. Because the batteries pop out and swap in seconds, keeping a set charging in a multi-port charger means a crew can rotate onto fresh batteries partway through a long shift with no downtime.

Range and Clarity

A standard nine-user EVADE system carries a genuine line-of-sight range of around 400 yards (roughly 365 metres). Steel bulkheads, engine rooms, and solid structures will shorten that in practice, as they do with any wireless system, but for the vast majority of vessels and worksites that's comfortably enough to keep a crew connected bow to stern.

Every EVADE headset also carries noise-cancelling microphones designed to isolate a voice from background engine and wind noise, which is where a lot of the day-to-day value shows up. It's less about the headline range figure and more about every word actually landing clearly the first time.

System Components at a Glance

• Main headset: the hub of the system. Only one Main per system, relaying signals to and from every Remote headset.
• Remote headsets: up to eight per standard system, each able to talk and listen to everyone else at once.
• CMod conference module: an optional add-on that extends a system beyond nine users, up to around 16, or up to roughly 30 when two CMod-equipped systems are linked.

Setup itself is genuinely simple. There's no base station to install and no channels to programme. Charge the batteries, switch the headsets on, and the crew is talking within minutes.

Choosing the Right Eartec System for Your Crew

EVADE is one part of a wider Eartec range, and the right choice comes down to your crew size, your environment, and whether you need to talk to people on an existing two-way radio network.

A look at Eartec's UltraLITE hands-free headset range, useful context if you're weighing up EVADE against Eartec's smaller portable systems.

EVADE for Marine and Heavy Industrial Work

EVADE is the pick for crews of up to nine (or more, with a CMod) working in genuinely rough conditions: fishing vessels, construction sites, search and rescue teams, and anyone who needs a system built to take a knock and keep working.

UltraLITE for Small, Mobile Teams

For teams of two to four people who value portability over ruggedness, Eartec's UltraLITE range is a lighter, fully self-contained alternative with no base station at all. It suits event production, small film crews, coaching, and similar light-duty jobs.

ProLine for Integrating with Existing Two-Way Radios

Many New Zealand sites already run two-way radio networks from Tait, Motorola, or Hytera. Eartec's ProLine headsets plug directly into that existing radio gear, letting hands-free headset users and handheld radio users share a single unified communication network rather than running two separate systems side by side.

If you're not sure which of these fits, that's exactly the conversation to have with MSL before you buy. Getting the wrong system for your crew size wastes money either way.

Eartec EVADE in New Zealand Marine and Industrial Settings

Picture a commercial fishing crew hauling gear in a rolling swell. The engine's droning, the wind's up, and getting the net in cleanly depends on the skipper's calls landing instantly. With EVADE, that's a calm, continuous conversation instead of a shouting match across the deck.

On Construction Sites and in Emergency Response

On a construction site, a crane operator and a ground spotter working through a full duplex headset get the same benefit: constant, natural back-and-forth with none of the pauses that come from push-to-talk radios. That reduces genuine risk during lifts and heavy manoeuvres. Search and rescue teams working out of sight of one another in rugged terrain rely on the same hands-free, always-on link to keep search patterns coordinated.

Beyond Marine and Construction

• Event and film production: coordinating camera, lighting, and security crews silently during a live shoot or event.
• Convoy and off-road work: vehicle-to-vehicle coordination on remote tracks, even where there's no cell coverage at all.
• Agriculture and viticulture: coordinating harvest or irrigation teams across a large property.

Across every one of these settings, the value is the same. Every instruction gets heard the first time, which is what actually keeps a job moving and a crew safe.

Getting Set Up with Mobile Systems Limited

Mobile Systems Limited has supplied and supported New Zealand's marine, industrial and commercial communications sector for over 25 years, and we're a certified New Zealand distributor for Eartec's full range, including EVADE, UltraLITE, ProLine and wired intercom systems.

We supply Eartec gear nationwide, and our team can talk you through exactly which configuration, headset style, and system size actually fits your crew, rather than just selling you a box off a shelf.

Why Work with MSL on Your Eartec System