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.
Some examples are: 1  Traumatic brain injuries. Traumatic brain injuries, often caused by traffic collisions or acts of violence, are common causes of comas. 2  Stroke. Reduced or interrupted blood supply to the brain (stroke), which may be caused by blocked arteries or a burst blood vessel, can result in a coma. 3  Tumors.