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.
Blood sugar : In people with diabetes, coma can occur when blood sugar levels stay very high. That's a condition known as hyperglycemia. Hypoglycemia, or blood sugar that's too low, can also lead to a coma. This type of coma is usually reversible once the blood sugar is corrected. Oxygen deprivation: Oxygen is essential for brain function. Cardiac arrest causes a sudden cutoff of blood flow and oxygen to the brain, called hypoxia or anoxia.