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At 39.3 metres long, she is fitted with a range of high specification survey equipment and to the highest and most modern technical standards. With DP1 dynamic positioning, a service speed of 15 knots and a maximum speed of 17 knots, THV Alert will be deployed primarily to cover the southeast coast where she will be able to respond rapidly to any maritime incident.

Additionally, THV Alert can be utilised as a research platform with her large working deck that can be used for deployment of scientific equipment and sampling work.

Available 24/7 with accommodation for an additional four people, THV Alert is a state of the art vessel that can be utilised for a wide range of projects at very competitive rates including:

  • hydrographic surveys including bathymetry, side scan, sonar and wreck investigations
  • aids to navigation deployment, maintenance, repair and examination
  • research platforms for deployment and recovery of scientific equipment
  • sampling projects
  • marine hazard search and marking
  • lifting, towing and accurate positioning of marine equipment
  • recovery and re-establishment of off-station aids to navigation
  • sea trials of electronic and specialty equipment
  • helicopter support
  • safety boat assignments
  • guard duties for cable and pipe laying projects

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Trinity House’s Rapid Intervention Vessel (RIV), ALERT, has been designed with buoy handling, wreck marking, towing, multibeam and side scan hydrographic surveying capability. With DP1, high specification survey equipment and a maximum speed of 17 knots, ALERT is deployed primarily to cover the southeast coast where she can respond rapidly to any maritime incident. In addition, with her large working deck and 0.6m diameter through hull instrument tube, she is an ideal research platform for deployment of scientific equipment and sampling work.

Available 24/7 with accommodation for an additional 4 people, ALERT can be utilised for a wide range of projects at very competitive rates.


Build Standard

  • Lloyds Register @100 A1 SSC Workboat G4@ Lloyds Machinery Certificate
  • Unmanned Machinery Space Certificate
  • Machinery Condition Maintenance
  • Lloyds Environmental Policy
  • Lifting Appliance and Dynamic Positioning to CM Standard.
  • Complies with requirements for UK MCA Class V111 vessel.

Specification

Port of Registry - London
Year Built - 2005
Call Sign - MLPH9

Tonnage - 302t

Length Overall - 39.3m
Breadth Moulded - 8.0m
Depth Moulded - 4.0m
Draft - 2.7m
Air Draft - 18.0m

Maximum Speed - 17kts
Service Speed - 12kts
Fuel Consumption at 12 kts - 360ltrs/hr

Bunker Capacity - 42t
Fresh Water - 12t

Endurance - 1,500nm @ 15kts; 3,000nm @ 12kts; 5 days working on site

Bollard Pull - 28t

Propulsion - machinery

Main Engines - 2 x Caterpillar Diesel 1492 kW @ 1600 RPM
Auxiliary Generators - 2 Caterpillar C90 Diesel 155 kW @ 1620 RPM
Bow Thruster - HRP 155kW @ 1620 RPM
Propellers - 2 Kamewa variable pitch 50 XF5/4

Dynamic positioning system

Kongsberg C-Pos (IMO DP Class 1)

Workboat

RIB 5.4m 50hp

Cranes
Palfinger knuckle boom – 3.5t @ 10m; 2.2t @ 15m
Winch 3.3t SWL

Chain / towing winch

Chain Capacity - 100m x 38mm
Max pull - 40t

Deck facilities

Main Deck Area - 88m2
2 x ISO 10’ Container Lock Down matrix
Electrical Power - 230V and 400V Supplies
Pressure Wash - 350bar/5000psi
Through Hull Instrument Tube - 0.6m diameter
Hold - Storage & workshop

Accommodation

Single Cabins - 2
Twin Cabins (Bunks) - 4
Crew - 6
Spare Berths - 4
Mess Room -
Changing Room - 1
Showers - 2
Toilets - 3

Hydrographic survey

Multi beam E/S - Kongsberg Simrad EM 3002D
Echo Sounder - Kongsberg Simrad EA 400
PosMV 320 V4
SVP - Valeport Modus (Fixed Unit)
SVP - OSIL Smart AML
Tide Gauge - Kongsberg TD304
Sonar - Simrad SL 30/35
Side Scan - Simrad GeoAcoustics

Communication

GMDSS Area 2
Satcoms - Sat-C H2095C
Iridium - Sailor ST4110
MF/HF SSB - R/T DSC Sailor CU5100
Navtex Rx - Furuno NX700
VHF R/T DSC - 2 x Sailor RT4822
VHF - Sailor RT2048
Internet access - all cabins

Navigation equipment

ECDIS/NAV - F/AIS-R4
Radars - Decca Bridge Master E250 S Band; Decca Bridge Master E250 X Band
Dual-Axis Speed Log - Consilium SAL SD4-2
DGPS - 2 x Litton Marine LMX 420
Gyro Compass - Sperry Navigat Fibre Optic
TMC Magnetic Compass - Sperry Navipol 1
Auto Pilot - Sperry NaviPilot 4000 l
Echo Sounder - Sperry ES 5100-01


Download full specification for THV Alert [PDF]


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