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A deep-penetrating anchor (DPA) is conceptually similar to a torpedo anchor: it features a dart-shaped, thick-walled, steel cylinder with flukes attached to the upper section of the anchor. A full-scale DPA is approximately 15 metres (49 ft) in length, 1.2 metres (4 ft) in diameter, and weighs on the order of 50–100 tonnes (49–98 long tons ...
Length between perpendiculars – The distance between where the forward part cuts the waterline and the rudder post of the ship. Length Overall (LOA) – The maximum length of the ship between the ship's extreme points; important for berthing purposes. Length at Waterline (LWL) – The ship's length measured at the waterline.
The three ropes are so tightly wound counter to the weave of the constituent ropes that the fibers are compressed and the individual weaves stressed, sealing out the water and resulting in a length of about 180 metres (100 fathoms), the UK traditional definition of cable length. Using a cable, the raising of the anchor, or any activity ...
Day shapes are black in color and their sizes are determined by the ColRegs; for example, the size of the ball is not less than 0.6 metres (2.0 ft). The vertical distance between shapes is at least 1.5 metres (4.9 ft). Vessels of less than 20 metres (66 ft) length may use shapes of smaller size commensurate with the size of the vessel. [2]
The ratio of the length of rode to the water depth is known as the scope. Holding ground is the area of sea floor that holds an anchor, and thus the attached ship or boat. [4] Different types of anchor are designed to hold in different types of holding ground. [5]
In terms of disadvantages, the stockless anchor is shown to perform poorly in soft cohesive bottoms such as soil or sand compared to other anchor types made specifically for that type of bottom. [6] Also, the Navy Stockless Anchor has an efficiency rate of 4–6, compared to other types of anchors with efficiency rates ranging from 15 to 55. [7]