OSD finds right solution for dredger conversion

Dundee, UK, 15/03/2017 12:00am

Offshore Ship Designers (OSD) has extensive experience in ship conversion. One of the latest conversion projects was a dredger conversion for Kendall Brothers.

OSD was approached by Southampton Marine Services (SMS) on behalf of Kendall Brothers to help in their search for a vessel suitable for converting into an aggregate suction dredger. The main challenge for OSD, which has broad knowledge of dredger design, was finding a vessel with scantlings substantial enough to avoid extensive replacement of main structure. After a review of several secondhand vessels, the Carissa, a Damen-built coaster, was chosen as the most suitable because its double-bottom structure did not require replacement for carrying cargoes with a specific gravity of 2.2.

The OSD-IMT design team in the UK introduced a long, narrow hold to minimise loads on the structure and to provide wide side-decks which incorporated the dredging system on the starboard side and the discharge conveyors on the port side. A conventional grab discharger was mounted on a self-propelled carriage spanning the hold. All steelwork and outfit installation was carried out by SMS from design information prepared by OSD.

The cost-effective conversion is now fully operational and the vessel is landing aggregate cargoes at its home port of Portsmouth.
Karissa suction dredger previously Carissa