Class 4 (4th Engineer) SC&S 📅 Dec 2024

Exam Question

(a) Define angle of loll.

(b) A box barge 60 m long and 10m wide floats at an even keel draught of 4 m. It has a compartment amidships 12 m long.

Calculate the new draught if this compartment is laid open to the sea when:

(i) µ is 100%

(ii) µ is 85%

(iii) µ is 60%

Reference Answer

### (a) Angle of Loll
**1. Definition:**
Angle of loll is the angle to which a vessel, that is initially unstable in the upright condition (negative initial metacentric height, GM), will heel to port or starboard to attain a state of stable equilibrium. It is a permanent angle of heel caused by inherent instability, not by external forces like wind or wave action.
**2. Conditions for Occurrence:**

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