July 2022 Nav Arc 1

Q.2 A ship of L = 150m drawing 5.0m forward and 7.0m aft. Her W = 13,000 t, TPC = 23, LCF = 73.50 m runs aground at a point 20m aft of forward perpendicular. After grounding the drafts are found to be 4.6m forward and 7.0 aft. Find:
(a) Rise in tide required for the vessel to refloat.
(b) Upthrust experienced by the hull due to grounding.

Answer: