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Sentinel Ocean Systems

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Trading as SENTINEL OCEAN SYSTEMS LTD, registered at Companies House number 13600869.

What we have checked

Every brand here has to clear one test before it is listed at all: the company is a UK legal entity with real activity here. That is a question about the business, and it is deliberately not the same question as where any individual product is made.

• uk registered entity: Companies House record resolves, status active. This maker publishes no company number, so the record was matched on its registered postcode appearing at https://sentineloceansystems.com/contact/. Inferred by us (§3.3), not stated by the company. Source, checked 2026-08-29.
• uk hq: Registered office is a UK address: 63-65 Heworth Road, York, YO31 0AA. This is the registered office, which is not necessarily where the company operates. Source, checked 2026-08-29.

We have only checked company registration so far. Evidence of UK employment or a UK site is the next thing we intend to gather, and until we have it we say so on every product rather than implying it.

What they make

4 products listed. 4 don't say where they are made, so neither do we.

• 
  LJL901 AIS Lifejacket LightSentinel Ocean Systems£42.09♥Save
• 
  MRB901 AIS MOB BeaconSentinel Ocean Systems£56.84♥Save
• 
  HJ9018 AIS/DSC MOB BeaconSentinel Ocean Systems£168.42♥Save
• 
  Freedom8 Shark DeterrentSentinel Ocean Systems£599♥Save