Cargo working gear consists of shackles, cranes, derricks and their associated equipment, masts and Sampson posts and the wires/ropes used to connect them all together. Shackles. Types: Shackles are named according to their different shapes, ie “D” or “Straight backed”, “Bow” or “Harp” shackles. One other type which is not…
Until now we have been looking at the loading and discharge of what is known as General Cargo. There has been a large shift away from general cargo vessels with the introduction of containers. Containers are very large steel boxes with lockable doors at one end. Thr idea is that…
The loading and discharging of cargo is greatly eased with the help of the proper equipment for its handling. In this chapter we will be discussing the various items of equipment and their uses. Rope slings. Rope slings are constructed by joining the ends of a piece of 25 to…
Whilst currents/tidal streams have the greatest effect on the movement of vessels, the wind can also affect their movement. The effect of the wind on vessel movement is two fold: Firstly, it will cause an increase or decrease of the speed through the water depending on whether the wind is…
The following example is used to explain the procedure to follow: Problem: A vessel steaming at 10 knots wishes to make good a course of 110° (T) from its 1200 position. Find the course to steer allowing for a current setting 170° (T) at 2 knots. Solution: Plot the 1200…
The following example is used to explain the procedure to follow: Problem: From an observed position at 1200 a vessel steers 110° (T) at 10 knots. The current is setting 350° (T) at 2 knots. Determine the estimated position for 1330. Solution: Plot the true course from the 1200 position.…
