# FAQ: What Does +500 On A Aviation Sectional Mean?

## What is MEF on sectional chart?

On VFR sectional charts the Maximum Elevation Fig- ure ( MEF ) gives pilots an obstruction-free altitude. The MEF is determined by rounding the highest elevation (or obstruction height) within the quadrangles of lati- tude and longitude to the next 100-foot level.

## What are the big numbers on a sectional chart?

The Maximum Elevation Figure shows up on a sectional chart as a large number with a slightly smaller number next to it as illustrated in the image above with the red circle. These numbers have two digits dropped off of the end, so [ large ] 2 [small] 6 is 2,600 feet.

## What does ++ mean in the IFR supplement?

The ++ symbol next to the times means that during periods of daylight savings time the hours will be one hour earlier than shown.

## How do you know if an airport has fuel on a sectional chart?

The current practice is to use tick marks around the airport symbol to indicate that fuel is available and the field attended Monday through Friday from 10h00 to 16h00, local time. Today, many airports have self-service fuel so there is no longer a need for an attendant to be present.

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## Are sectional charts in MSL or AGL?

Sectional charts normally show both mean sea level ( MSL ) and above ground level ( AGL ) heights for towers. Next to the tower, you’ll see two numbers. The top number is the height in MSL and the bottom number — in parentheses — is the height of the tower in AGL.

## How do you read a TAF?

The date and time are formatted using two sets of four digits each with the first two digits representing the day of the month and the second two the 24-hour time in hours only (no minutes since TAFS are issued on the hour). The first set of digits is the start date/time and the second is the end date/time.

## How do I know if my MOA is active?

The best way to figure out if a MOA is active is to call Flight Service or Center. They can let you know if there is scheduled activity, or if there are aircraft actively operating in a MOA. How do you ask? Just call up Center or Flight Service on their frequency, and ask if the MOA you’re near is active. 6

## What does yellow on a sectional chart mean?

Yellow areas indicate that, while flying at night, you will be able to easily identify the area as Richmond (or anywhere else) on a sectional chart.

## What is the difference between a magenta airport and a blue airport when found on a sectional chart?

You can tell it’s an uncontrolled airport due to the magenta color of the runway outlines. The difference this airport just has the runways outlined versus a circle around the entire airport. That means one runway is greater than 1,500ft in length. If it is controlled airport, the lines are blue.

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## What is a Mon airport?

The VOR MON Concept of Operations includes the use of “Safe Landing Airports ” now referred to as “ MON Airports ” where ILS or VOR instrument approach procedures will be retained to provide a safe recovery for aircraft in the event of a GPS outage event.

## What is DOD flip?

Flight Information Publications and Flight Information Products ( FLIP ) are sensitive flight critical mapping and charting type items produced by the National Geospatial-Intelligence Agency (NGA), foreign governments and commercial vendors that are distributed by Defense Distribution Mapping and varied civilian