Marine Engineering and Naval Architecture

The mooring refers to any permanent structure to which a vessel/ship may be secured. Examples include quays, wharfs, jetties, piers, anchor buoys, and mooring buoys. A ship is secured to a mooring to forestall free movement of the ship on the water. An anchor mooring fixes a vessel's position relative to a point on the bottom of a waterway without connecting the vessel to shore. As a verb, mooring refers to the act of attaching a vessel to a mooring. Mooring is often accomplished using thick ropes called mooring lines or hawsers. The lines are fixed to deck fittings on the vessel at one end and to fittings such as bollards, rings, and cleats on the other end. Mooring requires cooperation between people on a pier and on a vessel. Heavy mooring lines are often passed from larger vessels to people on a mooring by smaller, weighted heaving lines. Once a mooring line is attached to a bollard, it is pulled tight. Large ships generally tighten their mooring lines using heavy machin...

Locker space plays an important role in deciding whether to install a vertical or horizontal windlass. Estimating or measuring the depth of fall of the rode into the anchor locker may dictate which type of windlass is most suitable for your vessel. Fall is the distance between the bottom of your windlass (horizontal) or windlass motor (vertical) and the top of the rode when the anchor is stowed. The length of chain and/or rope, along with the type of rope (8-plait or 3-strand), must also be taken into account. 8-plait line is better suited for small lockers and the design of the line helps prevent hockling. The depth of fall is the same for chain only rodes and rope/chain rodes. The minimum recommended fall for anchor rodes is 12 inches. The windlass does not stow the rode in the locker, gravity does.

1. General 1.     Windlass of sufficient power and suitable for the size of chain cable is to be fitted. Where wire ropes are proposed and approved in lieu of chain cables, suitable winches capable of controlling wire rope at all times are to be fitted. 2.     Windlass is to have one cable lifter for each anchor required to be kept ready for use. The cable lifter is normally to be connected to the driving shaft by release coupling and provided with brake. 3.      For each chain cable, a chain stopper is normally to be arranged between the windlass and hawse pipe. The chain cables are to reach the hawse pipe through the cable lifter only. 4.      Electrically driven windlasses are to have a torque limiting device(slip clutch). Electric motors are to comply with the requirements. 5.      The windlass is to be capable of exerting, for a period of 30 minutes, a contin...