At sea, the silence that follows a lost connection has always carried real danger — and for generations, maritime crews have built redundancy into every critical system except, perhaps, the most human one: the ability to simply speak to one another. Seafy's new P2T system, launched in October 2026, addresses that gap by placing a self-contained push-to-talk voice network aboard the vessel itself, running on crew smartphones through the ship's own Wi-Fi with no dependence on the internet or cloud infrastructure. It is a quiet but meaningful restatement of an old maritime principle — that a ship
Seafy Launches Offline Push-to-Talk System for Vessel Crew Communications
A vessel cannot depend on an external connection for its departments to communicate.
Mark
Why does a ship need its own communication server? Can't crews just use regular phones?
Mimi
At sea, there's often no cellular network. Even satellite internet can be unreliable or expensive. If your crew can't talk to each other because you lost external connectivity, you've got a serious safety problem.
Luke
Right, but that's been true for decades. Why is this different from existing maritime radio systems?
Mimi
It's not replacing radio—it's giving crews the option to use smartphones they already carry, through the ship's Wi-Fi, without needing a separate handset for each person.
Mark
So the cost savings come from not buying dedicated radio equipment?
Mimi
Partly that. But also from the licensing model. You pay per vessel, not per user. A ship with 500 crew members pays one fee.
Luke
How do we know the system actually works at sea? This is a press release from the company.
Mimi
Fair point. We have their technical specs—sub-100ms transmission, support for 1,000 users, priority messaging. But real-world testing on actual vessels isn't mentioned here.
Mark
What happens if the onboard server fails?
Mimi
The source doesn't address that. It's a single point of failure for the entire ship's internal communications.
Luke
That's a significant gap. You'd want redundancy on a vessel, especially for safety-critical communications.
Mimi
Absolutely. That's a question worth asking Seafy directly.
Mark
And the activity logging—does that create privacy concerns for crew?
Mimi
The system logs access and channel activity, not conversation content. But yes, crew members would know their communications are being tracked.
The Pulse
- Ships at sea risk total internal communication failure the moment an external satellite or internet link goes down — a vulnerability P2T is designed to eliminate at its root.
- Seafy installs a local server directly aboard the vessel, letting crew on the bridge, in the engine room, and on deck talk through standard smartphones in under 100 milliseconds, with no outside infrastructure involved.
- Priority-level messaging ensures urgent transmissions can cut through routine traffic, while a centralized dashboard gives supervisors a full activity log of channel access without recording voice content.
- When external connectivity does exist, the system automatically extends to link multiple vessels and shore teams — but the offline-first design means that capability is an addition, never a dependency.
- A vessel-based licensing model supporting up to 1,000 users per ship removes per-person cost barriers, giving entire large crews access under a single fee structure.
At sea, the silence that follows a lost connection has always carried real danger — and for generations, maritime crews have built redundancy into every critical system except, perhaps, the most human one: the ability to simply speak to one another. Seafy's new P2T system, launched in October 2026, addresses that gap by placing a self-contained push-to-talk voice network aboard the vessel itself, running on crew smartphones through the ship's own Wi-Fi with no dependence on the internet or cloud infrastructure. It is a quiet but meaningful restatement of an old maritime principle — that a ship must be able to sustain itself, in communication as in all else, wherever the sea takes it.
Seafy has launched P2T, a push-to-talk communication system designed around a principle that maritime operators have long understood: a vessel at sea cannot afford to have its internal communications held hostage by an external connection. The system installs as a server directly aboard the ship, routing voice calls across the vessel's existing Wi-Fi network to crew members using standard iOS or Android smartphones — no specialized radio hardware required.
When a crew member transmits, their voice reaches the onboard server in under 100 milliseconds. The system prevents simultaneous transmissions and supports priority levels, allowing urgent messages to interrupt routine traffic. No voice is recorded; the dashboard logs only channel access and timing, giving supervisors an activity trail without surveillance of content.
When external connectivity is available, P2T expands naturally — linking fleets and connecting crew to shore-based management systems. But that expansion is always the optional layer. The ship's internal network remains the primary system, and the design never assumes the outside world is reachable.
Licensing follows the same vessel-first logic: a single ship license covers up to 1,000 users across three configuration tiers, with roles and permissions managed centrally by the shipping company. Chief Innovation Officer Raffaele Borgese put the philosophy plainly at launch — a vessel cannot depend on external infrastructure for its departments to communicate. P2T translates that constraint directly into architecture, leaving crews connected regardless of what lies beyond the hull.
Seafy has built a communication system that lets ship crews talk to each other through their own phones—no internet required, no cloud dependency, no special radio equipment needed. The system, called P2T, installs as a server directly on the vessel and manages voice calls across the ship's existing Wi-Fi network, connecting crew members working on the bridge, in the engine room, and out on deck through standard iOS or Android apps.
The core problem P2T solves is straightforward: a ship at sea cannot afford to lose internal communications because an external connection fails. Seafy's approach keeps that lifeline entirely self-contained. When a crew member presses to talk, their voice reaches the onboard server in under 100 milliseconds. The system prevents multiple people from transmitting at once and supports priority levels, so urgent messages can interrupt routine traffic when necessary. Nothing is recorded—the system logs only who accessed what channel and when, creating an activity trail that supervisors can review through a management dashboard.
When a vessel does have external connectivity, P2T extends beyond the ship itself. It can link communications between multiple vessels in the same fleet and connect crew members to shore-based teams and management systems. That synchronization happens automatically, so the same system that works offline becomes a bridge to the wider operation when conditions allow. But the design philosophy remains unchanged: the ship's internal network is the primary system, and external connectivity is the optional layer.
The licensing model reflects this vessel-first thinking. Seafy charges by ship, not by user, with three configuration tiers available depending on vessel type and operational needs. A single license supports up to 1,000 users aboard, meaning a large crew can all use the system without per-person fees. User identities, roles, and permissions are managed centrally, so the shipping company maintains full control over who can access which channels and what they're authorized to do.
Raffaele Borgese, Seafy's Chief Innovation Officer, framed the launch around a fundamental maritime reality: "A vessel cannot depend on an external connection for its departments to communicate." That constraint—the impossibility of relying on outside infrastructure—has shaped maritime operations for decades. P2T translates that constraint into a design principle. Crew members get the communication tool they need, the company retains control of the system, and the ship remains operationally independent regardless of whether it has a satellite link or not.
Notable Quotes
A vessel cannot depend on an external connection for its departments to communicate. With P2T, crew members can communicate from their smartphones, on board and without internet access, while the shipping company retains full control of the system.— Raffaele Borgese, Chief Innovation Officer at Seafy
Want the full story?
Read the original at Smart Maritime Network ↗
Technology