Sub-Bottom Imager™ (SBI™) The evolution of Sub-Seabed visualization

The Sub-Bottom Imager™ uses advanced acoustics to provide a real-time view of the sub-seabed in full 3D in a continuous longitudinal path 5m wide by 5m depth of subsea pen-etration. The SBI integrates with industry standard survey software to delineate discrete objects, stratigraphy and geohazards with decimeter resolution. The SBI can be operated from a surface vessel for shallow water, or from WROV for deep water.

Applications and Capabilities • Pre-Route Engineering and Decommissioning Surveys Identification of boulders and other submerged items along pipeline/cable route, decommissioning area, or excavated drilling center location (Arctic/Ice infested waters) • As-Laid/As-Built Surveys Accurate imaging of pipeline/cable and surrounding seabed to burial depths of 5m Clearly images stealth flowlines and umbilicals Magnetisation and/or tone not required Surveys energized cables • Integrity Surveys Accurate detection of areas along pipeline/cable requiring remedial action

Benefits • Survey planned pipeline/cable routes to identify obstacles • Map buried pipelines and cables to confirm cover, monitor movement and comply with regulations • Find and map objects in the seabed for removal re decommissioning • Locate boulders in complex seabeds prior to dredging operations • Qualify buried magnetometer targets for size and shape prior to excavation and removal

PanGeo Subsea Sub-Bottom Imager™skid mounted to ROV

Deliverables • Depth of cover for pipelines and cables to depths of 5m • High resolution stratigraphy • Discrete geohazards detection: Boulders, UXO, Gassy Soils, Hard Layers

beneath seafloorCable Top of Cable

Along-track stratigraphic view of buried HVDC cable showing 1.5m burial depth reducing to near seafloor and dropping back to 2m depth

Plan view 0.2m below seabed

100 m

2 m1.5 m

Plan view 0.9m below seabedSample Images from HVDC Cable Survey with ROV-Mounted SBI

Item Weight in air (kg)

Weight in water (kg)

Height (m)

Length (m)

Width (m)

SBI Front Frame (incl. Hydrophones/Projectors)

510 135 0.59 1.49 3.54

SBI Subsea electronic bottles and rack (excl. mounting skid)

170 65 0.36 1.63 1.06

SBI Total buoyancy can be added to make the weight in water neutral

680 *200

Typical ROV mounting skid 200 150 0.802 2.66 1.85

Contact Information:PanGeo Subsea Inc. 277 Water Street St. John’s, NL Canada A1C 6L3 Tel +1 709 739 8032 Ext. 224 Fax +1 709 739 8035

PanGeo Subsea Scotland Ltd. 8 Abercrombie Court Prospect Road, Arnhall Business Park Westhill, UK AB32 6FE Tel +44 1224 766180 Fax +44 1224 766181

Email: sales@pangeosubsea.comwww.pangeosubsea.com

SBI™ Payload Package: • 5 x 8 channel hydrophone arrays • 3 x HF chirp projectors: 4 -14 kHz • INS/DVL – IXBLUE PHINS or similar • Folding array for launch/recovery

Operating Specifications• Minimum operating water depth: 3m • Maximum operating water depth: 1,000m • Survey altitude: 3.5m +/- 0.5m above seabed (nominal) • Survey speeds: up to 2 knots

ROV Interface • 115 volts AC, 50/60 Hz, 5 amps • 1000 Base-T 1 Gb Ethernet (or Spare Optical Fibre) • 1 hydraulic JIC4 port @ 2500 spi

Launch & Recovery• ROV: Most ROV LAR systems • Vessel: Trailing Arm Mount

General Specifications for SBI

SBI Mosaic of Ship Wreck: expanded buried debris field showing bronze canons

2.3m

Chirp Transmitters

5 x 8 ChannelHydrophone

SBI Fully Assembled with Shilling ROV Skid

Outer Array Folds for Launch & Recovery

1.8m

3.54m open(2.64m closed)

SBI Front Frame Plan View

SBI™ Current ROV Fitments: • Schilling • Millenium • Supporter • Zeus

3D image of SBI ensonified seabed area along pipeline / cable route

SBI Shallow-water front frame for trailing arm mount on surface vessel