ABSTRACT
When the angle exceeds the safe limit of 120 degrees she is commencing to ride to a tight span. Fig. 2.1 illustrates the parallelogram of forces for an angle of 120 degrees.
Fig. 2.2 shows the successive stages of this manœuvre. The vessel is headed into the anchorage with the wind or current on one bow in order to assist counteraction of lee drift. The weather anchor (or upstream anchor) is let go on the run (1), and headway continued for roughly one-third of the final length of cable. The second anchor is let go and the first one snubbed at the gypsy. As the vessel brings-to on her weather cable, it gradually grows taut to windward, snubbing the bows round (2). If the engines are then worked ahead, using weather helm, so as to keep the cables taut (the second cable is checked soon after the anchor is let go) the bows will develop a rapid swing into the stream or wind. By keeping a little ahead of her anchors (3), so that both cables grow slightly aft, the manœuvre is hastened. When heading into the wind or stream, both cables are veered (the second one only, for a short while) and the vessel brings-to in position (4). The reason for veering the second one by itself while dropping back initially is to middle the ship between her anchors. By laying out one-third of the length between the anchors, each finally lies a point on the bow.
