Cargo VesselsPast and PresentPilot TenderTrinity House Pilot Vessels

THV Alert – Past and Present

IMO Number: 9338618

THV Alert

© Simonwp

© Simonwp (Harwich, 26/04/2023)

Steel twin screw motor vessel built in 2006 by Nordwerft, Gdansk Stoez, Remontowa, Gdansk (Yard No 841) as a Rapid Intervention Vessel.

Technical Data

  • Length: 39.3 m (overall) 34.2 m (between perpendiculars)
  • Breadth: 8.0 m
  • Depth: 4.0 m
  • Draught: 2.7 m
  • Tonnage: 3672 gross/1101 net/1233t deadweight
  • Engines: 2 x Caterpillar Diesel
  • Power: 2984 kW/4057 HP
  • Speed: 12 knots (service) 17 knots (max)
  • Crew: 6 + 4
  • Bollard Pull: 28t
  • Cranes: Palfinger Knuckle Boom – 3.5t @ 10m 2.2t @ 15m Winch 3.3t SWL
  • Call Sign: MLPH9
  • MMSI Number: 235010690
  • IMO Number: 9338618
  • Registry: London/UK 🇬🇧

Current AIS Location

Please note that this specific vessels AIS position data may be over an hour old and that the vessels position will only be displayed when it is within range of the VesselFinder AIS system. The AIS transponder/ship position data featured on this page is intended for information purposes only and it is in no way related to the 'Safety of Navigation at Sea'. All the AIS ship position data featured within this article is provided by VesselFinder and we are therefore not responsible for its content or its accuracy.


The ALERT’s arrival represented the completion of the first stage of an investment of £38 million on three new vessels by the General Lighthouse Authorities (GLAs) of the United Kingdom and Ireland.

October 11th 2005: Launched.

April 10th 2006: Taken over by Trinity House. Registered owner: Williams & Glyn’s Leasing, The Promenade, Cheltenham UK. Ship manager: Trinity House, Tower Hill, London UK.

April 13th 2006: Arrived in Harwich to complete her final trials before entering service with Trinity House.

The ship is stationed on the south-east coast of England in order to be able to react immediately to shipping accidents in the English Channel and the Strait of Dover.

© Dover Strait Shipping © Dover Strait Shipping © Dover Strait Shipping © Dover Strait Shipping

© Dover Strait Shipping (All)

© Chris Hunsicker

© Chris Hunsicker (Gunwharf, Portsmouth harbour, 29/07/2006)

© John Pegden

© John Pegden (Dover, 12/08/2020)


All information is believed to be correct and no responsibility is accepted for any errors or omissions. All items included in this article are subject to © copyright. We would like to take this opportunity of thanking: Dover Strait Shipping, Chris Hunsicker, John Pegden and Simonwp for their assistance in producing this feature.

Article © Nigel Thornton and Ray Goodfellow (Dover Ferry Photos Group)

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