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   Osprey Explorer i Hawk Explorer      Bos Atlantic       Virak

THE SIGNIFICANT PROJECTS

M/V "OSPREY EXPLORER" and "HAWK EXPLORER"
The seismic-research vessels

1. M/V "Osprey Explorer" (ex Gepard)

The vessel was built in 1985 in Poland in Gdansk Shipyard, as supply vessel. She had a superstructure with navigation deck located on bow section and the engine room located at the midship. Vessel was equipped in towing winches and deck davit. Gepard's deck was equipped in two powerful foam generators, couple water-foam guns and sea water suction pump diesel engine driven, changing ship into rescue vessel. In 2006 she has been converted in SHIPREPAIR YARD "NAUTA" S.A. in Gdynia. After conversion "Osprey Explorer" became seismic-research vessel.

The main dimensions:
Length o.a	81,16 m
Length b.p	71,45 m
Draught	7,20 m
Breadth	15,96 m

Conversion consisted in vessel adaptation for new tasks set by the Owner. In aft section deck hangar structure with heli-deck was added. Structure according to Vik & Sandvik design was build according DNV regulations and rules. Vessel obtained DNV +1A1 ICE-1C HELI class. During conversion into seismic-research vessel, three high pressure air compressors with driving units, have been installed on deck. Additional, streamer winch with handling system, umbilical winches and seismic equipment handling winches have been installed on hangar-deck. Also superstructure was rebuilt extending her capacity over 6 new accommodation compartments, new instrument room, for seismic equipment, and stores. During conversion 200 tones of new steel was used. Assumption scope of work increased over twice and also took up vessel common systems.

Additional the scope of conversion included:

• vessel adaptation fulfilling SOLAS regulations,
• rebuilding existing piping system as needed,
• rebuilding electric installation,
• connecting new electric generator to Diesel engine, previously driving sea water suction pump,
• assembling computer network and intercom system,
• increasing accommodation/office area and instrument room by superstructure rebuilding,
• accommodation compartments renewal;
• navigation deck upgrading,
• fitting of new fire detection, foam and CO₂ system,
• fitting of high pressure air system,
• assembling cranes and FRC davit.

For the conversion the ships steel of A grade was used and works were carried out under supervision of the Classification Society Det Norske Veritas (DNV). Conversion's technical drawings and technological documentation have been prepared by the Projects Technical Service Department of Shiprepair Yard "NAUTA" S.A. in Gdynia.

2. M/V "Hawk Explorer"

The vessel was built in 1984 in Norway in accordance with the rules and regulations of DNV. She was build as a shrimp trawler with a large work-deck, two reefer holds and factory plant. The engine room is all located at the stern section and accommodation area has been located at the bow section, plus the superstructure at the midship. In 2006 she converted in SHIPREPAIR YARD "NAUTA" S.A. in Gdynia. After conversion "Hawk Explorer" became seismic - research vessel.

The main dimensions:
Length o.a	66 m
Breadth moulded	14,4 m
Draught	8,25 m
GT	2273
NT	884

Conversion consisted in vessel adaptation for new tasks set by the Owner. In aft section deck hangar structure with heli-deck was added. Structure according to Vik & Sandvik design was build with DNV regulations and rules. Vessel obtain DNV +1A1 ICE-1C HELI class. During conversion into seismic-research vessel, two high pressure air compressors with drive units, have been installed on deck. Additional, streamer winch with handling system, umbilical winches and seismic equipment handling winches have been installed on hangar-deck and inside of new built streamer well. Also new instrument room, for seismic equipment was build in rebuild superstructure. Assumed scope of work increased twice and also took up vessel common systems.

Additional the scope of conversion included:

• vessel adaptation for SOLAS regulations,
• rebuilding existing piping system as needed,
• rebuilding electric installation,
• assembling computer network and intercom and surveillance system,
• increasing accommodation/office area and instrument room by superstructure rebuilding,
• accommodation compartments renewal;
• navigation deck upgrading,
• fitting of new fire detection, FM-200, Flexi Fog and CO₂ local protection system,
• fitting of high pressure air system,
• assembling cranes and FRC davit,
• fitting of azimuth propeller, as a second independent propulsion system for vessel.

For the conversion the ships steel of A class was used and works were carried out under supervision of the Classification Society Det Norske Veritas (DNV). Technical drawings and technological documentation of conversion have been prepared by the Projects Technical Service Department of Shiprepair Yard "NAUTA" S.A. in Gdynia.

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