In line with SOLAS safety standards, with respect to critical life saving equipment, MRT has introduced an annual service and recertification program to ensure that all sMRT Alerting units remain certified and fit for purpose, for the expected life of the product.

To ensure the highest standards are maintained, all service activities are carried out by an approved MRT “Service Centre of Excellence”.

By performing the servicing & recertification of all sMRT equipment in this manner, we ensure that dedicated, fully trained personnel perform all service activities in a consistent, professional and expedient manner. All test activities are undertaken utilising specialised custom built equipment that is supplied and regularly calibrated by MRT. Approved MRT Service Providers worldwide adhere to the same strict quality assurance standards as the service technicians at our headquarters in the United Kingdom.


We maintain detailed records of all servicing activities; log the results of all tests, parts replaced, serial & MMSI numbers, unit usage data and customer details. These are available upon request for the operational life of all of our units.

A recertification certificate is issued after each service and the equipment then has an additional 12-month warranty 

“MRT will provide a customised annual recertification schedule that fits your business needs”


The Annual Service and Recertification procedure includes the following -

Personal Locator Beacons

• Visual inspection & clean

• Battery consumption analysis & replacement

• Seal replacement if required

• O ring & Base cap seal replacement

• Switch replacement

• Continuous quality improvements:-Implement ECN's as required

• Water activation circuit test


Software Analysis:

• Upgrade software version

• Upgrade firmware if required

• Service Requirement Indicator (SRI) reset

• Capture usage data

• Profile Check


AIS Tests:

• GPS acquisition and accuracy check

• AIS 1 & 2 carrier frequency accuracy check

• AIS 1 & 2 carrier frequency power level check

• AIS 1,2 & 14 message transmission and reception test • Self test check

• AIS test function test


VHF DSC Functional Test:

• Power Level check

• Frequency accuracy and drift

• VHF DSC Receiver check


Transmitter Tests:

• 121.5 MHz transmitter full output power check

• 121.5 MHz transmitter test function power check

• 121.5 MHz transmitter carrier frequency accuracy check

• 121.5 MHz transmitter modulation depth check


Certificate issued and warranty valid for a further 12 months.

Base Units

Please contact us for more information on base unit service options.

Life Jackets

Visual inspection

The first stage of a life jacket service is a visual inspection. We visually inspect the below aspects of the life jacket for any signs of damage, wear and tear;

  • Webbings
  • Stitching
  • Buckles
  • Cover
  • Bladder

Pressure Testing

Providing the visual inspection is clear, the next stage of the process is a pressure test. The life jacket is inflated and then left, monitoring the millibar levels over a set time to ensure there is no more than a 2mb drop in pressure.

Finding Leaks

If a life jacket fails a pressure test, the leak then needs to be identified. If the leak is found to be from a changeable part such as the oral inflation valve, the part can be replaced and a further pressure test undertaken. However, if the leak is found to be from the bladder of the life jacket, this is not repairable, deemed as a fail and should be subsequently taken out of service.

Rearming and Repacking

Once the life jacket has successfully been visually checked and pressure tested, the canisters can be replaced and the life jacket rearmed, repacked and made ready for use. Any parts, such as bobbins, will be replaced at this stage if the expiry date falls within the following 12 months.

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  • Videos
  • Tech Sheets
  • Guides and Manuals

To request an RMA number or find out more about service and recertification, please use the contact form below