STANDARD HORIZON HX400IS Handheld VHF with Voice Scrambler – Rugged, Reliable Marine Communication
The STANDARD HORIZON HX400IS handheld VHF radio is a top choice for professional mariners and offshore workers. Designed with safety and durability in mind, this intrinsically safe (IS) device is approved for use in hazardous environments. It includes a built-in voice scrambler for secure communications, making it an essential tool for secure, clear communication at sea or onshore.

HX400IS – Designed for Hazardous Marine Environments
When you’re working in flammable or potentially explosive environments, you need a radio that is both safe and effective. The HX400IS is intrinsically safe and compliant with ATEX standards. In addition, the built-in scrambler feature ensures your communications stay private, which is crucial in sensitive or competitive operations.
Top Features of the HX400IS VHF Radio
- Intrinsically Safe (IS) certified for hazardous environments
- 700mW loud audio for noisy areas
- Built-in voice scrambler for secure communication
- 5/1 Watt selectable power output
- Large display with clear channel information
- Programmable scanning and dual/triple watch functions
- Long-lasting Lithium-Ion battery (2300mAh)
Why Choose SEANAV for HX400IS Supply & Service?
At SEANAV, we specialize in providing high-quality marine communication systems. We supply, configure, and service the STANDARD HORIZON HX400IS for ships, oil rigs, and offshore platforms. Moreover, our team ensures every unit is certified and tested for optimal performance. Whether you’re looking for replacements or full fleet deployment, SEANAV is your trusted marine electronics partner.

Frequently Asked Questions (FAQ)
1. Is the HX400IS suitable for use in explosive areas?
Yes. It is intrinsically safe (IS) and certified for hazardous locations.
2. What does “voice scrambler” mean?
It means the radio can secure transmissions so only authorized radios can decode them.
3. How loud is the HX400IS audio?
It provides 700mW of loud audio, perfect for noisy maritime environments.
4. What kind of battery does it use?
The radio includes a 2300mAh Lithium-Ion battery for extended use.
5. Can I scan multiple channels?
Yes. It supports programmable scanning, dual, and triple watch modes.
6. Is it waterproof?
Yes, the HX400IS is waterproof and submersible to IPX8 standards.
7. Can SEANAV provide programming services?
Absolutely. We program, test, and deliver ready-to-use units.
8. Does this radio support private communication?
Yes. The scrambler ensures your voice transmissions are encrypted.
9. Is the radio lightweight?
Despite its rugged build, it’s compact and lightweight, ideal for handheld use.
10. Can I use it for ship-to-ship communication?
Yes. It’s fully VHF compliant for marine use including ship-to-ship and ship-to-shore calls.
11. Where can I purchase it?
You can order directly from SEANAV with full support and configuration options.
Conclusion
If you’re operating in a high-risk environment and require reliable communication, the STANDARD HORIZON HX400IS is your best choice. With voice scrambler capability and SEANAV’s expert support, you’re equipped with secure and powerful VHF connectivity. Contact us today to order your HX400IS units and upgrade your team’s communication.