On deep-draft ships, what statement is true concerning high and low sea suctions for machinery space sea water cooling systems?

Correct Answer: Option A — A high sea suction is located near the turn of the bilge and is used primarily in port or when operating in shallow water and a low sea suction is located near the bottom of the ship and is used primarily while underway.

High sea suctions are positioned near the turn of the bilge to avoid ingesting silt or debris when in shallow water or port. Low sea suctions are located near the keel to ensure a continuous supply of cooling water while the vessel is deep-drafted and underway in open water.