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Brazilian yard building Incat Crowther dive duo

Written by Nick Blenkey
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JULY 17, 2015 — A pair of 43 m Incat Crowther design monohull dive support vessels currently under construction at Brazil’s Arpoadar Engenharia shipyard have been ordered by Oceanica Offshore for service with Petrobras.

The design is an innovative concept combining the latest ideas from designer, builder, and operator and has been developed to meet RINA class requirements for special service, diving, and dynamic positioning.

The aft main deck features a large working deck that will house the hyperbaric chamber, dive bell crane, portside deck crane, and ROV crane. Inside the main deck house are functional areas including a dive operations office, a workshop, two toilet spaces, laundry room, TV room, lunch room, galley featuring space for large walk-in cooler and freezer, pantry, and dining/meeting room.

On the mid deck are a davit crane for a rescue / work boat, a waste storage area and anchor winch. Inside the cabin, are crew quarters which accompany 12 crew members. Each stateroom features bunks, desk, lockers and ensuite bathrooms.

The spacious wheelhouse on the upper deck has forward and aft facing vessel control stations and a desk wrapping around the stairwell for workspace. In addition to from perimiter windows providing 360 degree visibility, overhead windows both forward and aft give increased visibility around offshore structures.

Below decks are accommodations for the remaining 24 crew members with six four-berth cabins al featuring feature bunks, desks, lockers and ensuite bathrooms.

Amidships are a large machinery space housing compressors, pumps, main switchboard, and other diving support equipment. A sizable engine room and a waterjet compartment are located aft.

Four Cummins QSK-19 main engines, each producing 492 kW, will power each vessel with propulsion provided by four Hamilton HM-521 jets.

Waterjet propulsion was selected to reduce diver risk.

Electrical power will be provided by three Cummins QSM 11, 300 ekW gensets plus one Cummins 6BT5.9, 92 ekW emergency genset. Two Rodriquez 15 kWtunnel thrusters provide maneuvering and station keeping power.
The vessels will have a service speed of 12.5 knots.

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