Anchors The specific requirements for anchoring equipment in ships are laid down by the Classification Societies and is determined as per each ship's displacement, her wind area down to the summer load line. These requirements are the weight of anchor, number of anchors, length of chain cable and breaking strength.Requirements also specify that the cable must be secured in the chain locker by an arrangement whose breaking strength is greater than 15% and less than 30% of the tensile proof stress of the chain (Norske Veritas). Also, the breaker of the windlass must be able to withstand a … [Read more...]
IALA Buoyage System
The International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) is a non-profit organization founded in 1957 to collect and provide nautical expertise and advice.• Lateral marks indicate the edges of a channel.• Cardinal marks indicate the direction of safe water at a dangerous spot.• Safe water marks indicate the deep water and open end of a channel.• Special marks indicate administrative areas, such as speed restrictions or water skiing areas.• Isolated danger marks indicate a hazard to shipping. Lateral MarksRegion A Region A comprises … [Read more...]