water-ballast

基本解释

In a water-ballast boat, a chamber in the bottom of the hull fills with water to provide this ballast.
在水壓載的帆船上，船底的一個空間蓄滿水以提供這種負載。
The paper discusses the design of the flow-through BW (i. e. ballast-water) system which is applied on ship.
本論文對船舶“溢流法”壓載水系統設計進行了比較深入的研究。
All galvanization, stainless steel and other non-ferrous metal fittings in water ballast tanks should be protected during sand-blasting. If have damaged, should be renew.
鍍鋅件、不鏽鋼或其它有色金屬材料的舾裝件的保護工作，沖砂中避免損壞。若有損壞，須更換；

Call it the Das Boot effect: With their deep keels and heavy ballast, J-boats push such a mass of water that they tend to hunker down in a breeze, submerging the bow and stern and soaking practically everyone on deck.
FORBES: Magazine Article