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.
Methods to wake comatose patients include reversing the cause of the coma (i.e., glucose shock if low sugar), giving medication to stop brain swelling, or inducing hypothermia. Inducing hypothermia on comatose patients provides one of the main treatments for patients after suffering from cardiac arrest.