The flagging tape are used in Wildland fire suppression as a navigational aid and to mark the trees. The markings on the tree shows the direction to the site and the way back. They used two special flagging tapes marked with 'spot fire' or 'escape route.'

Flagging tape is available in most hardware stores. If you based in the U.S. it will be at Home Depot, Ace Hardware, or Sears. One of the most popular online sites for packing, paper, and tape is Uline.com which does stock flagging tape as well.

U.S. stores which sell flagging tape include most hardware retailers such as Home Depot, ACE, Sears, Lowes, and others. Online, you can buy flagging tape from the popular paper products retailer Uline at Uline.com.

They tried flagging him to slow down.

The police began flagging me to pull over.

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Someone is flagging us down.

There's someone in the road, flagging us down.