Why Reliable Comms Are Mission-Critical on the Water
For businesses operating on or near the water, a communication failure is never a minor hiccup. A delayed man-overboard call, a misunderstood instruction in rough seas, or an inability to check on a lone worker can have serious consequences. A failed radio can also halt an entire operation, costing time and revenue through missed tides or delayed logistics.
A professional communication system isn't an expense, it's a fundamental pillar of a safe, productive maritime operation, and it demonstrates a genuine commitment to crew wellbeing and professional standards.
The Core Marine Communication Technologies
VHF Marine Radio
For any vessel operating in NZ coastal waters, VHF is not just a good idea, it's a legal requirement. VHF gives you access to Channel 16, the universal distress frequency monitored around the clock by Maritime Radio and Coastguard New Zealand. As a line-of-sight technology, VHF is typically effective up to 20-30 nautical miles, suiting the vast majority of NZ coastal operations.
UHF/DMR Two-Way Radio
While VHF connects you to the outside world, UHF or DMR is for your internal team. These radios are built for clear, instant, short-range communication in noisy, demanding on-deck environments, coordinating a docking manoeuvre or managing a crew during a loud haul without tying up VHF's public channels.
Satellite Devices
Beyond the reach of coastal VHF, satellite becomes essential. Iridium and Inmarsat offer dependable voice calling for vessels working remotely or travelling between countries, while Starlink Maritime provides high-speed data for weather downloads, crew welfare, and cloud-based software access at sea.
Emergency Beacons: EPIRBs and PLBs
Emergency Position Indicating Radio Beacons (EPIRBs) and Personal Locator Beacons (PLBs) exist for one purpose: signalling for help in grave and imminent danger. When activated, they transmit a 406 MHz distress signal to the Cospas-Sarsat satellite system, relaying your beacon ID and GPS location directly to Rescue Coordination Centre New Zealand (RCCNZ) and triggering a search and rescue response.
An EPIRB is registered to a vessel, while a PLB is registered to a person, making a PLB the better choice for crew who might work away from the main boat.
NZ Licensing and Compliance
Operating a marine VHF radio requires two things: a Maritime VHF Radio Operator Certificate for the person using it, and a ship radio station licence from Radio Spectrum Management (RSM) for the vessel itself, which assigns a unique callsign.
For crew working alone on deck, devices with Man Down sensors and dedicated emergency buttons provide an automated safety net, an important part of meeting your duty of care under the Health and Safety at Work Act 2015.
Getting the Right System in Place
Mobile Systems Limited is 100% New Zealand owned and based in Mount Maunganui, with over 25 years supplying marine-grade communication equipment. We only supply devices with genuine IP67/IP68 durability ratings, since consumer-grade electronics rarely survive salt spray and constant moisture, and we handle licensing coordination alongside professional installation and antenna placement.
