New Guide Aims to Demystify Cargo Ventilation

Wednesday, August 16, 2006
The 'A' rated 65 million GT North of England P&I club has published a new guide for its members and the wider shipping industry on how to avoid problems and disputes arising from incorrect usage of natural and mechanical hold-ventilation systems on cargo ships. According to North of England's risk-management manager Tony Baker, “Even experienced mariners are sometimes uncertain of when to ventilate cargo spaces, and the situation is often further confused by the demands of charterers and shippers. However, the simple act of opening or closing hold ventilators at the wrong time can lead to cargo damage from ship's sweat, cargo sweat, rainwater or sea spray.” Entitled Cargo Ventilation - A Guide to Good Practice, the new 48-page A5 illustrated guide is aimed at masters, ships' officers and others associated with the carriage of dry cargoes. It addresses the key cargo-ventilation questions of why, when, what and how, with particular emphasis on the application and pitfalls of the 'dew-point' and 'three-degree' rules. It also aims to clarify many of the myths surrounding ventilation, such as whether to ventilate at night or in the rain.

The guide works at various levels, starting with a quick reference section on when to ventilate together with types of cargoes which should and should not be ventilated. This is followed by practical sections on the differences between hygroscopic and non-hygroscopic cargoes, measuring the dew point, when to start and stop ventilation, ventilation systems, and stowage and dunnage considerations. A scientific background is also included for those wishing to understand the underlying principles. The text is supported by graphics and photographs, ranging from the analogy of a misted-up bathroom mirror to the effects of a different combination of cargo, sea and air temperature. Illustrations are also provided of Stevenson screens, whirling psychrometers, typical hold ventilators, developments in dunnaging systems and the relationships between saturation vapour and temperature. Co-authored by David Anderson and Daniel Sheard, partners with international marine consultancy Brookes Bell, the guide is being distributed to North of England's 300 member groups and all entered dry cargo vessels.

Maritime Reporter November 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

New Products

Nordic Yards Delivers 'Wind Server'

Nordic Yards officially handed over the offshore service vessel to the Danish company DBB Jack-Up Services A/S. During the handover ceremony, the ship was named ‘WIND SERVER’.

NRL Researchers Demo Ship-to-Shore Data Link

Scientists at the U.S. Naval Research Laboratory (NRL) along with Mercury Continuity (MC) have demonstrated the Tactical Reachback Extended Communications (TREC) system in the port of Miami.

NASSCO Opens Bremerton Repair Facility

General Dynamics NASSCO celebrated the grand opening of its new location in Bremerton, Wash., yesterday. The facility will support the company’s recently-awarded contract to repair and maintain U.

 
 
Maritime Careers / Shipboard Positions Maritime Security Naval Architecture Offshore Oil Pod Propulsion Port Authority Salvage Ship Simulators Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1635 sec (6 req/sec)