Australia | South Pacific
Sea chests are gratings located underwater on the hull of a ship typically adjacent to the engine room. Sea chests are used to draw in water through them for ballast and engine cooling. They are grated to a certain size to restrict drawing in unwanted foreign materials.
This critical underwater intake area requires constant care and upkeep to ensure a free flow of sea water. Commercial Diving Services has significant experience in cleaning, maintenance and repairs of this area.
CDS offers a wide range of client services when it comes to the up keep of sea chests, whatever the vessels requirement maybe we can assist with, internal inspections, equipped with telescopic cameras, removal of sea gratings, repairs to fastenings and locking wires. Our divers have the equipment and the know how to carry out removal of sea gratings whilst vessel in alongside whether it be for class inspection requirements or just for company maintenance requirements.
Sea chests are a habitat for invasive species and significant marine growth will adhere to the gratings and internal over time, therefore causing an ever increasing restriction to the free flow of suction and cooling water which enters the seas suction gratings. Ultimately if the sea suction gratings are not cleaned free of marine growth the cooling water cannot pass through the gratings as they become blocked and must be cleaned. The cleaning of these sea gratings must take into account the risk of any dislodgement of invasive marine growth and such growth must be carefully removed and disposed of appropriately onshore so as to not contaminate the marine environment.
Commercial Diving Services have been doing extensive development of their HST patented system in regards to bio-security in the case of seas chest which requires cleaning being heavily fouled with invasive species, CDS’s HST system can be placed over the contaminated sea chest suction box for the treatment and killing or the invasive marine organisms using high sea water temperatures of around 90 degrees for extended periods to kill all of the unwanted pests before their removal on onshore disposal. CDS have taken the initiative with this advanced design of HST bio-security treatment in readiness for the ever increasing concern of bio-security and government regulations which are designed to protect our pristine marine environment.