Class 4 (4th Engineer) SC&S 📅 Feb 2025

Exam Question

(a) What is the metric length of one shackle of an anchor chain? (4)

(b) A vessel of 10000 t displacement burns 25 t of fuel per day when her speed is 12 knots. Calculate the probable consumption of fuel over a voyage of 3000 nautical miles at a speed of 11 knots with a displacement of 11000 t. (12)

Reference Answer

### (a) Metric Length of One Shackle of Anchor Chain (4 Marks)
A shackle is a standard unit of length for an anchor cable. The standard metric length of one shackle is **27.5 meters**.
For a comprehensive understanding, the equivalent lengths in other units are:
* **Imperial:** 90 feet

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