IP67 Dual Channel AIS MOB Rescue Device With VHF Voice Alert Maritime Alert Solution

Dual-channel AIS MOB Rescue Device With VHF Voice Alert. IP67 Waterproof, Long Battery Life, And No Base Station Required — A Reliable Personal Maritime Alert Solution.

Why rely on one signal, when you can trigger two?

AIS + VHF — Because one signal isn’t enough

Instant Alerts, Smarter Rescue. When seconds matter, the TB520 transmits both AIS and DSC distress signals automatically, enabling rapid discovery and response from nearby vessels. With dual-channel activation, it's not just an alarm — it’s a lifeline that speaks clearly, even when you can’t.

KEY ADVANTAGES

• AIS + DSC Dual Alarm: Sends automatic distress calls via both AIS and VHF DSC when submerged.
• Automatic Water Activation: No manual trigger needed. Activates within seconds of water immersion.
• DSC Group Call Messaging: Communicates distress via MMSI-coded DSC alert to nearby vessels.
• Precise GNSS Positioning: Uses BDS + GPS for accurate location tracking.
• Compact & Lightweight: Easily attachable to lifejackets, belts, or wearable gear.
• Long Battery Life: Operates for 8+ hours continuously after activation.
• Waterproof & Rugged: Rated IP67 for marine reliability.

TECHNICAL DATA

Drawings

What the TB520 Does in the Field?

When activated (automatically upon immersion or manually), the TB520 AIS MOB Rescue Device performs multiple life-saving actions simultaneously:

• Sends AIS MOB alert
  Transmits an AIS distress signal with GPS location to nearby vessels with chartplotters and AIS receivers.
• Broadcasts VHF voice alarm
  Repeated voice loop calling “Man Overboard” on VHF Channel 16, ensuring immediate human recognition even without digital devices.
• Accurate GNSS Positioning
  Integrated GPS or BeiDou module provides precise location for faster rescue coordination.
• Continuous Transmission
  Up to 8+ hours of distress broadcasting, with a flashing strobe light visible in low-light or rough sea conditions.
• Waterproof & Buoyant
  IP67-rated housing keeps the beacon afloat and functioning in all weather and wave conditions.

How It Works

Certified to International Standards

Our TB520 device meets or references the following maritime safety standards:

• IEC 61097-14 — AIS Search and Rescue Transmitters (AIS-SART)
• ITU-R M.1371 — Technical Characteristics for AIS
• IMO MSC.246(83) — Performance standards for AIS MOB devices
• IEC 60945 — Maritime navigation and radiocommunication equipment – General requirements
• IEC 61108-1 — GNSS receiver for GPS
• ITU-R M.493-14 — VHF DSC Distress Alert

All certifications and conformity documents are available upon request for procurement tenders and port authority registrations.

Dexonmarine, a brand of Chengdu Dixin Technology Co., Ltd., is a certified IALA industrial member specializing in marine buoys, AIS lanterns, navigation lights, and smart maritime systems.
Our company was founded in 2013 and officially registered in 2018. Our headquarters is based in Chengdu, China. With decades of experience serving the China Navigation Safety Center and major lighthouse bureaus nationwide, we are now bringing our proven marine solutions to the global market.