Final answer:
In the U.S., the altimeter should be set to 29.92 inHg at or above the transition level of 18,000 feet. For a climb to FL130, the setting should only be changed if the local altimeter setting differs.
Step-by-step explanation:
The question pertains to the standard altimeter setting in aviation during a climb to a specified flight level. In the United States and other regions following similar rules, 29.92 inches of mercury (Hg) or 1013.25 millibars/hPa is set on the altimeter when passing through a certain altitude known as the transition altitude. The transition altitude varies by country and can range from 3,000 feet to 18,000 feet. In the U.S., the transition altitude is 18,000 feet, therefore at or above this altitude, commonly called the transition level, you will set your altimeter to 29.92 inches of mercury. When climbing to Flight Level 130 (FL130), which is 13,000 feet, there is no need to change the altimeter setting to 29.92 if you depart from an airport in the standard pressure region unless the reported altimeter setting is different. It is essential to note that altimeter settings are crucial for ensuring the accurate indication of altitude and maintaining vertical separation between aircraft.