7 Common GMDSS Deficiencies That Can Delay a Vessel During Radio Survey
- 4 days ago
- 2 min read
Introduction
Every year, hundreds of vessels undergo mandatory GMDSS Radio Surveys to comply with SOLAS regulations. While many surveys are completed without issue, recurring equipment deficiencies continue to delay certification, increase repair costs, and disrupt sailing schedules.
Understanding these common problems before the survey can help vessel operators minimize downtime and avoid unnecessary port delays.
1. EPIRB Battery Expiry
One of the most frequent observations during a radio survey is an expired EPIRB battery or overdue servicing.
Recommendation
Check expiry dates before arrival.
Schedule servicing through an approved service provider.
2. Incorrect MMSI Programming
Incorrect or mismatched MMSI numbers between onboard equipment and documentation can lead to survey observations.
Always verify:
EPIRB
DSC Radio
AIS
Inmarsat terminals
3. Poor Antenna Performance
Damaged antennas, corroded connectors, or water ingress can reduce communication performance.
Typical issues include:
High VSWR
Loose RF connectors
Corrosion at antenna bases
Damaged coaxial cables
4. DSC Functional Test Failures
Digital Selective Calling (DSC) remains one of the most important parts of GMDSS testing.
Common failures include:
Incorrect GPS input
Faulty distress button
Configuration errors
Software issues
Routine testing helps identify these issues before inspection.
5. NAVTEX Reception Problems
Poor NAVTEX reception is often caused by:
Damaged antennas
Electrical interference
Incorrect installation
Outdated equipment
A simple operational check before the survey can prevent unnecessary observations.
6. VHF Handheld Battery Issues
Emergency handheld VHF radios frequently fail due to:
Weak batteries
Poor charging practices
Expired battery packs
Emergency equipment should always be checked as part of planned maintenance.
7. Incomplete Radio Documentation
Equipment may be functioning correctly, yet surveys can still be delayed because documentation is incomplete.
Examples include:
Radio License
Safety Radio Certificate
Accounting Authority details
LRIT documentation
Equipment inventory
Keeping documentation current is as important as maintaining the equipment itself.
How Marine Forte Enterprises Can Help
Marine Forte Enterprises provides worldwide technical assistance for:
GMDSS Installation & Maintenance
Radio Surveys
VDR / SVDR Annual Performance Tests
Satellite Communication Systems
Navigation Equipment Repairs
Radar & Gyro Compass Support
Emergency Technical Attendance
With more than 40 years of marine communications experience, our team supports ship owners, ship managers and offshore operators with practical, dependable technical solutions.
Conclusion
Preparing for a GMDSS Radio Survey should not begin on the day of inspection.
Routine maintenance, periodic equipment testing and timely servicing can significantly reduce deficiencies, helping vessels remain compliant while minimizing operational delays.
Whether your vessel requires scheduled maintenance or urgent technical assistance, Marine Forte Enterprises is ready to support your fleet with reliable marine electronics expertise.
Need Professional GMDSS Support?
Whether your vessel requires a routine radio survey, emergency troubleshooting, VDR annual performance testing, or satellite communication support, Marine Forte Enterprises is ready to assist.
✓ Worldwide Technical Attendance
✓ 40+ Years of Marine Communications Experience
✓ Fast Response
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