As of November 1st 2022 Marine Rescue Technologies is part of please visit to find out more


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.

Quality assurance guarantee

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

Recertification & Warranty

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 (PLB)

  • 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
Safety certification:

Issue certificate and validate warranty for further 12 months.

Life Jackets

Visual inspection:

Our experts will visually inspect all of the aspects below for any signs of damage, wear and tear:

  • Webbings
  • Stitching
  • Buckles
  • Cover
  • Bladder
  • Pressure Testing

Providing the visual inspection is clear, we will conduct 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 needs to be identified. If the leak is found to be from a changeable part, such as the oral inflation valve, it can be replaced. A further pressure test is then undertaken. If the leak is found to be from the bladder, this is not repairable. It will be deemed as a fail and should be taken out of service.

Rearming and Repacking:

Once the life jacket has been successfully checked and pressure tested, the canisters can be replaced and the life jacket rearmed, repacked and made ready for use. Any parts with an expiry date that falls within the next 12-month period, such as bobbins, will be replaced at this stage.

Base Units

Base Unit Servicing

Tailored to your individual requirements, we can conduct a thorough Base Unit service and inspection.

Please contact us for the options and more information.

Book Your Service Below

Product(s) being serviced Quantity Product options

We’re fully committed to handling personal information you’ve supplied to us in compliance with the latest GDPR laws, and we’ll never share your details. If you wish to unsubscribe, please click here to update your data preferences at any time.

Find Us

Global Headquarters
Marshall House,
Zarya Court, Grovehill Road, Beverley,
East Yorkshire, HU17 0JG, United Kingdom