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Can a CGM keep seafarers with diabetes safe at sea?

NCT ID NCT07251257

Knowledge-focused Sponsor: University of Surrey Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at whether continuous glucose monitors (CGMs) can help seafarers who need insulin manage their diabetes while working at sea. Fifty insulin-dependent seafarers will wear a CGM for 12 months and track their glucose levels during work and rest. The goal is to see if CGMs are accurate and practical enough to replace finger-prick tests, which could lead to fairer maritime rules.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
continuous glucose monitoring (CGM) system
What this could lead to
If successful, this could show that CGMs are reliable enough for seafarers with diabetes, potentially leading to updated safety rules that allow them to work more freely at sea.
What could go wrong
This is a small, early feasibility study with only 50 participants, so results may not apply to all seafarers. The CGM accuracy in harsh sea conditions is still unproven.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 50 people

The number the study aims to enrol. It can still change while the study runs.

Started

Nov 2025

Expected to finish

Apr 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Seafarers requiring insulin replacement therapy, and holding a valid ML5 or ENG1 certificate

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria:• * Any ethnicity * Seafarers requiring insulin replacement therapy, * Holding a valid ML5 or ENG1 certificate * Able and willing to wear a Continuous Glucose Monitoring system (GCMS) for 12 months * Able and willing to document out of range glucose values and activities in Fishers Watch App a while at sea Exclusion Criteria: * Outside of the stated age range. * Not able to use using a CGM glucose monitoring system for monitoring the glucose levels.

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Conditions

The condition(s) this trial relates to.

type 1 diabetes mellitus

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Insulin dependent diabetes

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of Surrey FHMS Nutritional Sciences

    RECRUITING

    Guildford, Surrey, GU2 7WG, United Kingdom

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