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

Exam Question

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

(b) A vessel of 10,000 t displacement consumes 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 11000t (12)

Reference Answer

### (a) Metric Length of One Shackle of Anchor Chain
A shackle is a standard unit of length for anchor cables. For a full-marks answer, the following points must be stated:
* **Standard Metric Length**: One shackle of an anchor chain is standardized to **27.5 meters** in length.
* **Imperial Equivalents**: This metric length is equivalent to **15 fathoms** or approximately **90 feet**.

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