Why is the off route obstruction altitude (OROCA) 1000 ft (or 2000 ft in mountainous terrain) higher than the maximum elevation figure that is seen on a sectional chart? Group of answer choices Regulations say that a pilot must be 1000 ft higher (or 2000 ft in mountainous terrain) than the maximum elevation figure. To let the pilot know there is an obstacle that extends to 1000 ft (or 2000 ft in mountainous terrain) below the OROCA. In order to maintain a 1000 ft clearance (or 2000 ft clearance in mountainous terrain) between the aircraft and the highest obstacle in that section of the chart