July 2024 AM Nav Arc 1

Q.3 A vessel displacing 14000 tonnes enters dry-dock with a clearance of 0.50m over the blocks. Drafts while entering dry-dock are 5.35 forward, 6.77m aft, MCTC 120, TPC 22 tonne, LCF 4.00 m aft of mid-ships, length 150m, KG 6.25M, KM 6.40m. Assume the hydrostatic data to remain constant.
Determine:
a) The drop in water level required before the vessel takes the blocks forward and aft.
b) The GM at the instant of taking the blocks. c) The further drop in water before the GM reduces to zero.

Answer: