Marine Engineering and Naval Architecture

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...

The only meaningful way to rate anchor winch performance is by looking at what it will lift and at what speed. The two things to consider are (a) the maximum pull capability and (b) the working load of the winch. Maximum pull (sometimes referred to as stall load) is the maximum short term or instantaneous pull of the winch. Working load is generally rated at about one third of the maximum pull and is usually considered to be the load that the winch is pulling once the anchor is off the bottom. To determine your required maximum pull capability, complete the calculation below. The most useful way to rate windlass performance is by looking at what it will lift and at what speed. The two things to consider are the working load and the maximum pull capabilities of windlass. Working load is the load that the windlass is pulling once the anchor and rode are off the bottom. Maximum pull (sometimes referred to as stall load) is the maximum short term or instantaneous pull of the windlass. ...