Before revision: Whether it is used to convey "absolute" as in "dead ahead," , "dead" in that the object is assumed not to have changed position or course, or reckoning using other objects that are "dead in the water ," is not known.
After revision: Whether it is used to convey "absolute" as in "dead ahead," ," or reckoning properly "you’re dead if you don’t reckon right reckoning using other objects that are "dead in the water ," is not known.