down bubble

短语

释义与例句

adj.
  1. 1.

    Having a downward trim (of a submarine); usually follows the number of degrees.

    航海 交通

    Dissatisfied with Sailfin's sluggish response, he turned the iron wheel a bit more until the bubble rode backward, indicating that the submarine's stern had lifted relative to the dipping bow. A glance at the calibrations etched into the brass plate behind the liquid-filled glass tubing told him that Sailfin's nose has dipped the required amount. "We have ten degrees down bubble, sir."

词源

From the bubble of air in the glass tube of the inclinometer, a gauge that indicates the submarine's vertical trim.

来源：wiktionary