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

Exam Question

(a) Define TPC. Explain why TPC for a given draught will vary with the density of the water in which the ship floats (6)

(b) The pitch angle, measured at a distance of 2m from the centre of the boss, was found to be 21.5° Calculate the pitch of the propeller (10)

Reference Answer

### Part (a): Tonnes Per Centimetre Immersion (TPC)
#### Definition of TPC
Tonnes Per Centimetre immersion (TPC) is a crucial hydrostatic parameter that quantifies the mass in tonnes required to be loaded or discharged to change the vessel's mean draught by exactly one centimetre.
- It is the weight that must be added to sink the ship by 1 cm at the current waterline.

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