From Wikipedia, the free encyclopedia

ROV PHOCA is a remotely operated underwater vehicle of the COMANCHE type. It was built by sub-Atlantic, Aberdeen, Scotland and is owned by the GEOMAR - Helmholtz Centre for Ocean Research Kiel. Its smaller size compared to the ROV KIEL 6000 and therefore its deploy ability from medium-sized research vessels makes it a complement to the QUEST type ROV. It can dive up to 3000m (9842.52 feet) and was designed as a Work-Class- and Intervention-ROV.

It is characterized by these features:

  • 2 manipulators facilitate different sampling procedures
  • Digital video cameras on pan-&-tilt units are used as survey and mapping devices
  • It is fitted with the following auto-functions: depth, heading and altitude
  • The digital telemetry system SubCanTM provides real time data transmission
  • A payload of up to 100 kg allows the integration of different additional scientific equipment
  • ROV PHOCA is deployed in the so-called live-boating mode, i.e. it is directly connected to the respective vessel via a steel armoured optical fiber cable

ROV PHOCA's main employment will be the installation and maintenance of the deep sea observatory MoLab, but also within other multi-disciplinary projects such as projects by the Cluster of Excellence "The Future Ocean".[1]

Technical specifications[edit]

Type: Comanche 21, electric "Workclass" ROV (sub-Atlantic)
Working Depth: up to 3000 m
Measurements: length: 2,1 m, width: 1,3 m, height: 1,35 m
Weight: in air: 1500 kg in water: buoyant
Propulsion: 7 electrical DC propeller SPE-250
Speed: max. 2,5 Knots
Station Keep (dP): ± 0,5 m
Auto Heading: ± 5°
Deep Sea Cable: 2700 m @ 19 mm, 1,3 t/km in air = 3,5 t, 1 t/km in water= 2,7 t in max. water depth; 3 high-voltage conductors @ 4 mm²; 3 LWL (single mode)
Digital Telemetrie: SubCanTM
Scientific Payload: up to 100 kg
Hydraulics: Pump 15 kW with 39 lpm @ 207 bar to power two manipulators.
Transport: 2 1/2 20'-ISO-Container. Total weight 30 t.[2]


  1. ^ Overview ROV PHOCA, GEOMAR - Helmholtz Centre for Ocean Research Kiel, 2012
  2. ^ Technical Specifications (German), GEOMAR - Helmholtz Centre for Ocean Research Kiel, 2012

External links[edit]