A common occurrence when a vessel is running into shallow water is that __________.

Correct Answer: Option C — "squat" will cause a decrease in bottom clearance and an increase in draft

Squat is a hydrodynamic phenomenon where a moving vessel experiences a pressure drop, causing it to sink deeper and trim differently. This reduces under-keel clearance, increasing the risk of grounding in shallow water. It is a critical consideration for masters when calculating safe passage through restricted or shallow channels.