Marine Engineering and Naval Architecture

The Mooring Lines (or cables) used to secure a ship at a berth. Mooring lines should be arranged as symmetrically as possible about the midship point of the ship. The Calculation of the size of the mooring rope is done same as the anchor size calculation .  The step of Mooring line calculation are as follows  Calculation of the Vessel or ship displacement in fresh water and sea water by the formula available. For formulas click here . Calculation of Equipment Number by formulas.for formulas click here . From Equipment Number, find out the the specification of Mooring rope /chain from the table. For table click here . From the Mooring line calculation, we find out the following:- Mooring Lines Number Length of each mooring ropes (m) Minimum breaking strength (KN)  The Specification from one company are as follows

Mediterranean mooring :  For this type of mooring, a pre-calculated position is determined and approached using engine movements. The bow initially is made to cant towards the berth and the starboard anchor is let go in that positions. After this the engines are run astern and the port anchor is let go at the designated spot. The vessel falls astern and swings to starboard. Thus vessel is held by both the anchors as it approaches the quay. Stern lines are then passed. Moorings are kept tight by using the anchor cables. The positioning of vessel is such that mooring is completed with around four shackles on each anchor. Often tide is used to control drift of the vessel towards quay while positioning it by heaving or paying out on one of the anchors. Running Mooring :  This manoeuvre takes relatively short duration compared to Mediterranean mooring and offers more control of the vessel. The vessel’s starboard anchor is let go at a position approximately...