1 Vessel Rate of Turn-If Rate of Turn is being received for an AIS vessel, a barb is added to the end of the heading vector, at right angles and pointing in the direction of turn. 2  Vessel Course Over Ground (COG) - COG is calculated from the delta of previous GPS locations and is displayed as a dashed line. The heading is displayed as a line emanating from the bow of the ship. 2  The length of the heading line is not related to vessel speed. 3  Vessel Rate of Turn-If Rate of Turn is being received for an AIS vessel, a barb is added to the end of the heading vector, at right angles and pointing in the direction of turn.
Drug-induced comas are used to protect the brain.They work by minimizing the energy expenditure of brain cells and by minimizing or preventing brain swelling. Therapeutic, medically-induced comas are generally resorted to only after conventional treatment measures fail to keep brain swelling down.
The brain wave activity in a comatose person is very different from that of a sleeping person; you can wake up a sleeping person, you can't wake a person in a coma. A coma usually does not last for more than a few weeks. Many people recover their full physical and mental functioning when they emerge from a coma.omeone in a coma cannot consciously respond to stimulation. Coma can be caused by an underlying illness, or it can result from head trauma. A comatose person is still very much alive, but he or she is not simply asleep.